C Primer Plus (第六版)中文版 6.16编程练习
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c + + p r i me r p l u s (第六版)课后编程练习答案〃ex2.1--display your n ame and address #in clude<iostream>int main(v oid){using n amespace std;cout<<"My n ame is liao chu ngua ng and I live in hunan che nzhou.\”〃ex2.2--convert the furlong units to yard uints扌把浪单位换位码单位#include<iostream>double fur2yd(double);int main(){using n amespace std;cout<<"e nter the dista nee measured by furl ong un its:"; double fur;cin»fur;cout<<"c onvert the furlo ng to yard"<<e ndl;double yd;yd=fur2yd(fur);coutvvfurvv" furlong is "<<yd<<" yard"<<e ndl;return 0;}double fur2yd(double t){return 220*t;}〃ex2.3-每个函数都被调用两次#in clude<iostream>void mice();void see();using n amespace std;int main(){mice();mice();see();see();return 0;}void mice(){cout«"three bli nd mice"«e ndl;}void see(){cout<<"see how they run"<<en dl;}〃ex2.4#in clude<iostream>int mai n(){using n amespace std;cout<<"E nter your age:";int age;cin> >age;in t mon th;mon th=age*12;coutvvagevv" years is "<<mon th<<" mon ths"<<e ndl;return 0;}〃ex2.5---convert the Celsius valve to Fahre nheit value#in clude<iostream>double C2F(double);int main(){using n amespace std;cout«"please en ter a Celsius value:";double C;cin> >C;double F;F=C2F(C);coutvvCvv" degrees Celsius is "<<F<<" degrees Fahre nheit."«e ndl; return 0; }double C2F(double t){return 1.8*t+32;}〃ex2.6---convert the light years valve to astronomical units-把光年转换为天文单位#in clude<iostream>double conv ert(double);//函数原型int main(){using n amespace std;cout<<"E nter the nu mber of light years:";double light_years;cin> >light_years;double astro_ un its;astro_ un its=co nv ert(light_years);cout<<light_years<<" light_years = "<<astro_u ni ts<<" astr ono mical un its."v<e ndl; return 0;}double conv ert(double t){return 63240*t;//1 光年=63240 天文单位}〃ex2.7--显示用户输入的小时数和分钟数#in clude<iostream>void show();mai n(){using n amespace std;show();return 0;}void show(){using n amespace std;int h,m;cout<<"e nter the nu mber of hours:"; cin> >h;cout<<"e nter the nu mber of minu tes:";cin>>m; coutvv"Time:"v<hvv":"vvmvve ndl;〃ex3.1—将身高用英尺(feet)和英寸(inch)表示#in clude<iostream> const int in ch_per_feet=12;〃cons常量--1feet=12i nches--1 英尺=12 英寸int main() {using n amespace std;cout<<"please en ter your height in inches: __ \b\b\b";〃\b表示为退格字符intht_in ch;cin> >ht_i nch;int ht_feet=ht_i nch/i nch_per_feet;//取商int rm_i nch=ht_i nch%i nch_per_feet;〃取余cout<<"your height is "<<ht_feet<<" feet,a nd " <<rm_i nch<< "in ches\n";return 0;}//ex3.2--计算相应的body mass index (体重指数)#in clude<iostream>const int in ch_per_feet=12;const double meter_per_i nch=0.0254;const double poun d_per_kilogram=2.2;int main(){using n amespace std;cout<<"Please en ter your height:"<<e ndl;cout«"First,enter your height of feet part (输入你身高的英尺部分):_\b";int ht_feet;cin> >ht_feet;cout«"Seco nd,e nter your height of inch part (输入你身高的英寸部分):_\b";int ht_in ch;cin> >ht_i nch;cout«"Now,please en ter your weight in pound: __ \b\b\b";double wt_po und;cin> >wt_po und;int in ch;in ch=ht_feet*i nch_per_feet+ht_i nch;double ht_meter;ht_meter=i nch*meter_per_i nch;double wt_kilogram;wt_kilogram=wt_po un d/po un d_per_kilogram; cout«e ndl;cout<<"Your pensonal body in formatio n as follows:"<<e ndl;cout«"身高:"<<inch<<"(英尺inch)\n"<<"身高:"<<ht_meter<<"(米meter)\n"<<"体重:"<<wt_kilogram<<"(千克kilogram八n";double BMI;BMI=wt_kilogram/(ht_meter*ht_meter);cout<<"your Body Mass In dex(体重指数)is "<<BMI<<e ndl;return 0;}〃ex3.3以度,分,秒输入,以度输出#in clude<iostream>const int minu tes_per_degree=60;const int sec on ds_per_m inu te=60;int main(){using n amespace std;cout<<"E nter a latitude in degrees, minu tes,a nd sec on ds:\n"; cout<<"First,e nter the degrees:";int degree;cin> >degree;cout<<"Next,e nter the minu tes of arc:";int min ute;cin»minu te;cout«"Fia nlly,e nter the sec onds of arc:";int sec ond;cin> >sec ond;double show_i n_degree;show_in_degree=(double)degree+(double)mi nute/mi nutes_per_degree+(doubl e)seco nd/mi nu tes_per_degree/sec on ds_per_mi nu te;cout<<degree<<" degrees,"<< minu te<<" minu tes,"<<sec on d<<"sec onds ="<<show_i n_degree<<" degrees\n";return 0;}//ex3.4#in clude<iostream>const int hours_per_day=24;const int minu tes_per_hour=60;const int sec on ds_per_m inu te=60;int main(){using n amespace std;cout<<"E nter the nu mber of sec on ds:";long sec on ds;cin> >sec on ds;int Day,Hour,M inu te,Sec ond;Day=sec on ds/sec on ds_per_mi nute/mi nu tes_per_hour/hours_per_day;Hour=sec on ds/sec on ds_per_mi nute/mi nu tes_per_hour%hours_per_day;Min ute=seco nds/seco nds_per_mi nute%mi nu tes_per_hour;Secon d=sec on ds%sec on ds_per_m inu te;cout«sec on ds<<"sec onds = "<<Day<<" days,"<<Hour<<"hours,"<< Minu te<<" minu tes,"<<Sec on d<<" sec onds\n";return 0;}〃ex3.5#in clude<iostream>int mai n(){using n amespace std;cout<<"E nter the world populati on:";long long world_populati on;cin> >world_populati on;cout<<"E nter the populati on of the US:";long long US_populati on;cin»U S_populati on;double perce ntage;perce ntage=(double)US_populati on/world_populati on *100;cout<<"The population of the US is "<<percentage<<"% of the world population.\n"; return 0;}〃ex3.6汽车耗油量-美国(mpg)or欧洲风格(L/100Km)#in clude<iostream> int main(){using n amespace std;cout«"E nter the miles of dista nee you have drive n:";double m_dista nee;cin>> m_dista nee;cout<<"E nter the gallo ns of gasoli ne you have used:";double m_gasoli ne;cin>> m_gasoli ne;cout<<"Your car can run "<<m_dista nce/m_gasoli ne<<" miles per gallo n\n";cout«"Computi ng by Europea n style:\n";cout<<"Enter the distance in kilometers:";double k_dista nce;cin>> k_dista nce;cout<<"E nter the petrol in liters:";double k_gasoli ne;cin>> k_gasoli ne;cout<<"I n Europea n style:"«"your can used "<<100*k_gasoli ne/k_dista nce<<" liters of petrol per 100 kilometers\n";return 0;}//ex3.7 automobile gaso line con sumption 耗油量--欧洲风格(L/100Km)转换成美国风格(mpg)#in clude<iostream>int main(){using n amespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"Europea n style(liters per 100 kilometers):";double Euro_style;cin> >Euro_style;cout<<"C onv erts to U.S. style(miles per gallo n):"«e ndl;coutv<Euro_stylevv" L/100Km = "v<62.14*3.875/Euro_style<v" mpg\n"; return 0; }// Note that 100 kilometers is 62.14 miles, and 1 gallon is 3.875 liters.//Thus, 19 mpg is about 12.4 L/100Km, and 27 mpg is about 8.7 L/100Km.Enter the automobile gasoline consumption figure inEuropean style(liters per 100 kilometers):12.4Conv erts to U.S. style(miles per gallo n):12.4 L/100Km = 19.4187 mpgPress any key to con ti nue // ex3.7 automobile gasol ine con sumption耗油量--美国风格(mpg )转换成欧洲风格(L/100Km)#in clude<iostream>int main(){using n amespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"U.S. style(miles per gallo n):";double US_style;cin >>US_style;cout<<"C onv erts to Europea n style(miles per gall on ):"<<e ndl;cout<<US_style<<" mpg = "<< 62.14*3.875/US_style<<"L/100Km\n"; return 0; }// Enter the automobile gasoline consumption figure inU.S. style(miles per gallo n) :19Conv erts to Europea n style(miles per gallo n):19 mpg = 12.6733L/100KmPress any key to con ti nue//ex4.1 display the information of student #in clude<iostream>const int Asize=20;using n amespace std;struct stude nt/定义结构描述{char first name[Asize]; char last name[Asize]; char grade;int age;};void display(stude nt);〃函数原型放在结构描述后int main(){cout«"what is your first n ame?"<<e ndl;stude nt leg;//创建结构变量(结构数据对象)cin .getli ne(lcg.first name,Asize); cout<<"what is your last n ame?"<<e ndl;cin .getli ne(lcg .l ast name,Asize);cout<<"what letter grade do you deserve?"<<e ndl;cin> >lcg.grade;cout<<"what is your age?"<<e ndl;cin> >lcg.age;display(lcg);return 0;}void display(stude nt n ame){cout«"Name: " <<n ame.first name<<","< <n ame .l ast name«e ndl;cout<v"Grade:"vvchar( name.grade+1)«e ndl;cout<<"Age:"< <n ame.age<<e ndl;} //ex4.2 use the stri ng-class in stead of char-array #in clude<iostream>#in clude<stri ng>int main(){using n amespace std;stri ng n ame,dessert;cout<<"E nter your n ame: \n";getl in e(ci n,n ame);cout<<"E nter your favorite dessert: \n"; getli ne(ci n, dessert);cout<<"I have some delicious "<<dessert; cout«" for you, "< <n ame<<".\n";return 0;〃有时候会遇到需要按下两次回车键才能正确的显示结果,这是VC++6.0的一个BUG,更改如下:else if (_Tr::eq((_E)_C, _D)){_Chg = true;_I .rdbuf()->sbumpc(); 〃修改后的break; }ex4.3输入其名和姓,并组合显示#in clude<iostream>#in clude<cstri ng>const int Asize=20;int main(){using n amespace std;char fn ame[Asize];char In ame[Asize];char full name[2*Asize+1];cout<<"Enter your first name:";//输入名字,存储在fname[]数组中cin .getli ne(fname,Asize);cout<<"Enter your last name:";//输入姓,存储在Iname[]数组中cin .getli ne(l name,Asize);strncpy(full name,l name,Asize);〃把姓ln ame 复制到full name 空数组中strcat(full name,",");// 把“,”附加到上述full name 尾部strn cat(full name,fname,Asize);//把fname 名字附加至U 上述full name 尾部fullname[2*Asize ]='\0';//为防止字符型数组溢出,在数组结尾添加结束符cout<<"Here's the information in a single string:"<<fullname<<endl;//显示组合结果return 0;} //ex4.4使用string对象存储、显示组合结果#in clude<iostream>#in cludevstri ng>int main(){using n amespace std;stri ng fname ,ln ame,attach,full name; cout<<"E nter your first n ame:";getline(cin,fname);//note将一行输入读取到string类对象中使用的是getli ne(ci n, str)//它没有使用句点表示法,所以不是类方法cout<<"E nter your last n ame:";getli ne(ci n,ln ame);attach=",";full name=In ame+attach+f name;cout<<"Here's the information in a single string:"<<fullname<<endl; return 0;}〃ex4.5 declare a struct and in itialize it 声明结果并创建一个变量#in clude<iostream> const int Asize=20; struct Can dyBar{char bran d[Asize];double weight;int calory;};int main(){using n amespace std;Ca ndyBar sn ack={"Mocha Mun ch",2.3,350}; cout<<"Here's the information of snack:\n"; cout<<"bra nd:"<<s nack.bra nd<<e ndl; 8山<<妝6:9“:"<<$ nack.weight<<e ndl; coutvv"calory:"vvs nack.calory<<e ndl; return 0; } //ex4.6结构数组的声明及初始化#in clude<iostream> const int Asize=20;struct Can dyBar{char bran d[Asize];double weight;int calory;};int main(){using n amespace std;Ca ndyBar sn ack[3]={ {"Mocha Mun ch",2.3,350}, {"XuFuJi",1.1,300},{"Alps",0.4,100}};for(int i=0;i<3;i++)〃利用for循环来显示snack变量的内容{cout«s nack[i].bra nd<<e ndl<<s nack[i].weight<<e ndl<<s nack[i].calory«e ndl«e ndl;}return 0;}〃ex4.7 pizza 披萨饼#in clude<iostream> #in clude<stri ng> const int Size=20;struct pizza//声明结构{char compa ny [Size]; double diameter; double weight;};int main(){using n amespace std;pizza pie;//创建一个名为pie的结构变量cout<<"What's the n ame of pizzacompa ny:"; cin. getl in e(pa ny ,Size); cout«"What's the diameter ofpizza:";cin> >pie.diameter; cout<<"What's the weight of pizza:";cin> >pie.weight;cout<<"compa ny:"«pa ny«en dl; cout<v"diameter:"vvpie.diameter<v"i nches"«e ndl; cout<v"weight:"vvpie.weight<v"o un ches"<<e ndl; return 0;}〃ex4.8 pizza pie披萨饼使用new创建动态结构#in clude<iostream>#in clude<stri ng>const int Size=20;struct pizza//声明结构{char compa ny [Size];double diameter;double weight;};int main(){using n amespace std;pizza *pie=new pizza;//使用new 仓U建动态结构cout<<"What's the diameter of pizza:";cin> >pie->diameter;cin. get();//读取下一个字符cout<<"What's the n ame of pizza compa ny:";cin .get(pie->compa ny,Size); cout<<"What's the weight of pizza:";cin> >pie->weight; cout<v"diameter:"vvpie->diameter< <" in ches"<<e ndl;cout<<"compa ny:"«pie->compa ny«en dl; cout<v"weight:"vvpie->weight<v" oun ches"<<e ndl;delete pie;//delete释放内存return 0;〃ex.4.9使用new动态分配数组一方法1#in clude<iostream>#in clude<stri ng>using n amespace std;struct Can dyBar{stri ng brand;double weight;int calory;};int main(){Can dyBar *sn ack= new Can dyBar[3];snack[0].brand="A";〃单个初始化由new动态分配的内存sn ack[0].weight=1.1; sn ack[0].calory=200; sn ack[1].bra nd="B";sn ack[1].weight=2.2; sn ack[1].calory=400; sn ack[2].bra nd="C";sn ack[2].weight=4.4;sn ack[2].calory=500;for(int i=0;i<3;i++){cout << " bran d: " << sn ack[i].bra nd << en dl;cout << " weight: " << sn ack[i].weight << en dl;cout << " calorie: " << sn ack[i].calory << en dl<<e ndl; }delete [] sn ack;return 0;} //ex.4.10数组一方法1#i nclude <iostream> int main(){using n amespace std;const int Size = 3;int success[Size];cout<<"E nter your success of the three times 40 meters runnin g:\n"; cin >> success[0]»success[1]»success[2];cout<v"success1:"v<success[0]vve ndl;cout<v"success2:"vvsuccess[1]v<e ndl;cout<v"success3:"v<success[2]vve ndl;double average=(success[0]+success[1]+success[2])/3;cout<<"average:"<<average<<e ndl;return 0;}//ex.4.10 array—方法2#i nclude <iostream>#in clude <array>int main(){using n amespace std;array<double,4>ad={0};cout<<"E nter your success of the three times 40 meters runnin g:\n"; cin >> ad[0]»ad[1]»ad[2];cout<v"success1:"v<ad[0]vve ndl;cout<v"success2:"vvad[1]v<e ndl;cout<v"success3:"v<ad[2]vve ndl;ad[3]=(ad[0]+ad[1]+ad[2])/3;cout<<"average:"<<ad[3]<<e ndl;return 0;}//ex.5.1#in clude <iostream> int mai n(){using n amespace std;cout<<"Please en ter two in tegers:" int n um1, num2;cin»n um1> >n um2;int sum=O;for(i nt temp=n um1;temp<=n um2;++temp)//or temp++sum+=temp;cout<<"The sum from "<<n um1<<" to "<<n um2<<" is "<<sum<<e ndl; return 0; }//ex.5.2#in clude <iostream>#in clude<array>int mai n(){using n amespace std;array vlong double,101>ad={0};ad[1]=ad[0]=1L;for(int i=2;i<101;i++)ad[i]=i*ad[i-1];for(int i=0;i<101;i++)coutvvivv"! = "v<ad[i]v<e ndl;return 0;}〃ex.5.3#in clude <iostream>int mai n(){using n amespace std;cout<<"Please en ter an in teger:";int sum=0,n um;while((ci n»num)&&n um!=0){sum+=n um;cout<<"So far, the sum is "v<sumv<e ndl; cout<<"Please en ter an in teger:";}return 0;}//ex.5.4 #in clude <iostream>int main(){using n amespace std;double sum1,sum2;sum仁sum2=0.0;int year=0;while(sum2<=sum1){++year;sum1+=10;sum2=(100+sum2)*0.05+sum2;}coutvv"经过"vvyearvv"年后,Cleo的投资价值才能超过Daphne的投资价值。
Chapter 2 Programming ExercisesPE 2-‐1/* Programming Exercise 2-1 */#include <stdio.h> intmain(void){ printf("Gustav Mahler\n");printf("Gustav\nMahler\n");printf("Gustav ");printf("Mahler\n"); return 0;}PE 2-‐3/* Programming Exercise 2-3 */#include <stdio.h> intmain(void){ int ageyears; /* age in years */int agedays; /* age in days *//* large ages may require the long type */ageyears = 101; agedays = 365 * ageyears;printf("An age of %d years is %d days.\n", ageyears, agedays); return 0; }PE 2-‐4/* Programming Exercise 2-4 */#include <stdio.h> voidjolly(void); voiddeny(void); intmain(void){ jolly();jolly();jolly();deny();return 0; }void jolly(void){printf("For he's a jolly good fellow!\n");}void deny(void){printf("Which nobody can deny!\n");}PE 2-‐6/* Programming Exercise 2-6 */#include <stdio.h> intmain(void){ int toes;toes = 10;printf("toes = %d\n", toes);printf("Twice toes = %d\n", 2 * toes); printf("toessquared = %d\n", toes * toes); return 0;}/* or create two more variables, set them to 2 * toes and toes * toes */PE 2-‐8/* Programming Exercise 2-8 */#include <stdio.h> voidone_three(void); voidtwo(void); int main(void){printf("starting now:\n");one_three(); printf("done!\n");return 0;}void one_three(void){printf("one\n"); two();printf("three\n");}void two(void){printf("two\n");}Chapter 3 Programming ExercisesPE 3-‐2/* Programming Exercise 3-2 */#include <stdio.h> intmain(void){int ascii;printf("Enter an ASCII code: "); scanf("%d",&ascii);printf("%d is the ASCII code for %c.\n", ascii, ascii); return 0; }PE 3-‐4/* Programming Exercise 3-4 */#include <stdio.h> intmain(void){ float num;printf("Enter a floating-point value: "); scanf("%f", &num);printf("fixed-point notation: %f\n", num);printf("exponential notation: %e\n", num);printf("p notation: %a\n", num); return 0;PE 3-‐6/* Programming Exercise 3-6 */#include <stdio.h> intmain(void){float mass_mol = 3.0e-23; /* mass of water molecule in grams */ floatmass_qt = 950; /* mass of quart of water in grams */ float quarts;float molecules;printf("Enter the number of quarts of water: "); scanf("%f",&quarts);molecules = quarts * mass_qt / mass_mol;printf("%f quarts of water contain %e molecules.\n", quarts, molecules); return 0; }Chapter 4 Programming ExercisesPE 4-‐1/* Programming Exercise 4-1 */#include <stdio.h> intmain(void){ char fname[40];char lname[40];printf("Enter your first name: ");scanf("%s", fname); printf("Enter yourlast name: "); scanf("%s", lname);printf("%s, %s\n", lname, fname); return0;}PE 4-‐4/* Programming Exercise 4-4 */#include <stdio.h> intmain(void){ float height;char name[40];printf("Enter your height in inches: ");scanf("%f", &height); printf("Enter your name:"); scanf("%s", name);printf("%s, you are %.3f feet tall\n", name, height / 12.0);return0;}PE 4-‐7/* Programming Exercise 4-7 */#include <stdio.h>#include <float.h> intmain(void){ float ot_f = 1.0 / 3.0;double ot_d = 1.0 / 3.0;printf(" float values: ");printf("%.4f %.12f %.16f\n", ot_f, ot_f, ot_f); printf("double values: ");printf("%.4f %.12f %.16f\n", ot_d, ot_d, ot_d);printf("FLT_DIG: %d\n", FLT_DIG); printf("DBL_DIG: %d\n",DBL_DIG); return 0;}Chapter 5 Programming ExercisesPE 5-‐1/* Programming Exercise 5-1 */#include <stdio.h> intmain(void){ const int minperhour = 60;int minutes, hours, mins;printf("Enter the number of minutes to convert: ");scanf("%d", &minutes); while (minutes > 0 ){ hours = minutes / minperhour;mins = minutes % minperhour;printf("%d minutes = %d hours, %d minutes\n", minutes, hours, mins); printf("Enter next minutes value (0 to quit): "); scanf("%d", &minutes);}printf("Bye\n");return0;}PE 5-‐3/* Programming Exercise 5-3 */#include <stdio.h> intmain(void){ const int daysperweek = 7;int days, weeks, day_rem;printf("Enter the number of days: ");scanf("%d", &days); while (days > 0){ weeks = days / daysperweek;day_rem = days % daysperweek;printf("%d days are %d weeks and %d days.\n",days, weeks, day_rem);printf("Enter the number of days (0 or less to end): "); scanf("%d", &days);}printf("Done!\n"); return0;}PE 5-‐5/* Programming Exercise 5-5 */ #include<stdio.h>int main(void) /* finds sum of first n integers */{int count, sum;int n;printf("Enter the upper limit: ");scanf("%d", &n); count = 0;sum = 0; while (count++< n) sum = sum + count; printf("sum= %d\n", sum); return 0;}PE 5-‐7/* Programming Exercise 5-7 */#include <stdio.h> voidshowCube(double x);int main(void) /* finds cube of entered number */{ double val;printf("Enter a floating-point value: ");scanf("%lf", &val); showCube(val);return 0; }void showCube(double x){printf("The cube of %e is %e.\n", x, x*x*x );}Chapter 6 Programming ExercisesPE 6-‐1/* pe6-1.c *//* this implementation assumes the character codes *//* are sequential, as they are in ASCII. */#include <stdio.h> #define SIZE 26int main( void ) { charlcase[SIZE]; int i; for(i = 0; i < SIZE; i++)lcase[i] = 'a' + i; for (i = 0; i< SIZE; i++) printf("%c",lcase[i]); printf("\n");return 0;}PE 6-‐3/* pe6-3.c *//* this implementation assumes the character codes *//* are sequential, as they are in ASCII. */#include <stdio.h> intmain( void ){ char let = 'F';char start; charend;for (end = let; end >= 'A'; end--){for (start = let; start >= end; start--) printf("%c", start); printf("\n");}return 0;}PE 6-‐6/* pe6-6.c */ #include<stdio.h> int main( void ){ int lower, upper, index;int square, cube;printf("Enter starting integer: ");scanf("%d", &lower); printf("Enter endinginteger: "); scanf("%d", &upper);printf("%5s %10s %15s\n", "num", "square", "cube"); for (index = lower; index <= upper; index++){ square = index * index;cube = index * square;printf("%5d %10d %15d\n", index, square, cube);}return 0;}PE 6-‐8/* pe6-8.c */ #include<stdio.h> int main( void ){ double n, m;double res;printf("Enter a pair of numbers: ");while (scanf("%lf %lf", &n, &m) == 2){res = (n - m) / (n * m);printf("(%.3g - %.3g)/(%.3g*%.3g) = %.5g\n", n, m, n, m, res);printf("Enter next pair (non-numeric to quit): ");}return 0;}PE 6-‐11/* pe6-11.c */#include <stdio.h>#define SIZE 8 intmain( void ){ int vals[SIZE];int i;printf("Please enter %d integers.\n", SIZE); for(i = 0; i < SIZE; i++) scanf("%d", &vals[i]);printf("Here, in reverse order, are the values you entered:\n"); for (i =SIZE - 1; i >= 0; i--) printf("%d ", vals[i]); printf("\n"); return 0;}PE 6-‐13/* pe6-13.c *//* This version starts with the 0 power */#include <stdio.h>#define SIZE 8 intmain( void ){int twopows[SIZE]; inti;int value = 1; /* 2 to the 0 */for (i = 0; i < SIZE; i++){ twopows[i] = value;value *= 2;}i = 0;do {printf("%d ", twopows[i]);i++; } while (i < SIZE);printf("\n");return 0;}PE 6-‐14/* pe-14.c *//* Programming Exercise 6-14 */#include <stdio.h>#define SIZE 8 intmain(void){ double arr[SIZE];double arr_cumul[SIZE]; inti;printf("Enter %d numbers:\n", SIZE);for (i = 0; i < SIZE; i++){printf("value #%d: ", i + 1);scanf("%lf", &arr[i]); /* or scanf("%lf",arr + i); */}arr_cumul[0] = arr[0]; /* set first element */ for (i = 1;i < SIZE; i++)arr_cumul[i] = arr_cumul[i-1] + arr[i];for (i = 0; i < SIZE; i++)printf("%8g ", arr[i]); printf("\n");for (i = 0; i < SIZE; i++)printf("%8g ", arr_cumul[i]);printf("\n");return 0;}PE 6-‐16/* pe6-16.c */#include <stdio.h>#define RATE_SIMP 0.10#define RATE_COMP 0.05 #defineINIT_AMT 100.0 int main( void ){double daphne = INIT_AMT;double deidre = INIT_AMT; intyears = 0;while (deidre <= daphne){ daphne += RATE_SIMP * INIT_AMT;deidre += RATE_COMP * deidre;++years; }printf("Investment values after %d years:\n", years);printf("Daphne: $%.2f\n", daphne); printf("Deidre: $%.2f\n", deidre); return 0;}Chapter 7 Programming ExercisesPE 7-‐1/* Programming Exercise 7-1 */#include <stdio.h> int main(void){ char ch;int sp_ct = 0;int nl_ct = 0;int other = 0;while ((ch =getchar()) != '#'){if (ch == ' ')sp_ct++; else if (ch =='\n') nl_ct++;else other++;}printf("spaces: %d, newlines: %d, others: %d\n", sp_ct, nl_ct, other);return 0;}PE 7-‐3/* Programming Exercise 7-3 */#include <stdio.h> intmain(void){ int n; doublesumeven = 0.0; int ct_even= 0; double sumodd = 0.0;int ct_odd = 0;while (scanf("%d", &n) == 1 && n != 0){if (n % 2 == 0){sumeven += n;++ct_even;}else // n % 2 is either 1 or -1{sumodd += n;++ct_odd;}}printf("Number of evens: %d", ct_even); if(ct_even > 0)printf(" average: %g", sumeven / ct_even);putchar('\n');printf("Number of odds: %d", ct_odd); if(ct_odd > 0)printf(" average: %g", sumodd / ct_odd);putchar('\n'); printf("\ndone\n");return 0;}PE 7-‐5/* Programming Exercise 7-5 */#include <stdio.h> intmain(void){ char ch;int ct1 = 0;int ct2 = 0;while ((ch =getchar()) != '#'){switch(ch){case '.' : putchar('!');++ct1; break;case '!' : putchar('!');putchar('!'); ++ct2; break; default : putchar(ch);}}printf("%d replacement(s) of . with !\n", ct1); printf("%d replacement(s) of ! with !!\n", ct2);return 0;}PE 7-‐7// Programming Exercise 7-7#include <stdio.h>#define BASEPAY 10 // $10 per hour#define BASEHRS 40 // hours at basepay#define OVERTIME 1.5 // 1.5 time#define AMT1 300 // 1st rate tier#define AMT2 150 // 2st rate tier#define RATE1 0.15 // rate for 1st tier#define RATE2 0.20 // rate for 2nd tier #define RATE30.25 // rate for 3rd tier int main(void){double hours;double gross; doublenet; double taxes;printf("Enter the number of hours worked this week: ");scanf("%lf", &hours); if (hours <= BASEHRS) gross = hours* BASEPAY; elsegross = BASEHRS * BASEPAY + (hours - BASEHRS) * BASEPAY * OVERTIME; if (gross<= AMT1) taxes = gross * RATE1; else if (gross <= AMT1 + AMT2)taxes = AMT1 * RATE1 + (gross - AMT1) * RATE2; elsetaxes = AMT1 * RATE1 + AMT2 * RATE2 + (gross - AMT1 - AMT2) * RATE3; net = gross - taxes;printf("gross: $%.2f; taxes: $%.2f; net: $%.2f\n", gross, taxes, net);return 0;}PE 7-‐9/* Programming Exercise 7-9 */#include <stdio.h> #include<stdbool.h> int main(void){int limit;int num; intdiv;bool numIsPrime; // use int if stdbool.h not availableprintf("Enter a positive integer: "); while(scanf("%d", &limit) == 1 && limit > 0){if (limit > 1)printf("Here are the prime numbers up through %d\n", limit); elseprintf("No primes.\n"); for(num = 2; num <= limit; num++){for (div = 2, numIsPrime = true; (div * div) <= num; div++)if (num % div == 0) numIsPrime = false; if (numIsPrime)printf("%d is prime.\n", num);}printf("Enter a positive integer (q to quit): ");}printf("Done!\n");return 0;}PE 7-‐11/* pe7-11.c *//* Programming Exercise 7-11 */#include <stdio.h>#include <ctype.h> intmain(void){const double price_artichokes = 2.05;const double price_beets = 1.15; constdouble price_carrots = 1.09; const doubleDISCOUNT_RATE = 0.05; const double under5 =6.50; const double under20 = 14.00; constdouble base20 = 14.00; const double extralb= 0.50;char ch;double lb_artichokes = 0;double lb_beets = 0; doublelb_carrots = 0; double lb_temp;double lb_total;double cost_artichokes;double cost_beets; doublecost_carrots; doublecost_total; doublefinal_total; double discount;double shipping;printf("Enter a to buy artichokes, b for beets, ");printf("c for carrots, q to quit: "); while ((ch =getchar()) != 'q' && ch != 'Q'){ if (ch == '\n')continue; while (getchar() !='\n') continue; ch =tolower(ch); switch (ch){case 'a' : printf("Enter pounds of artichokes: ");scanf("%lf", &lb_temp); lb_artichokes += lb_temp; break;case 'b' : printf("Enter pounds of beets: ");scanf("%lf", &lb_temp); lb_beets += lb_temp; break;case 'c' : printf("Enter pounds of carrots: ");scanf("%lf", &lb_temp); lb_carrots += lb_temp; break;default : printf("%c is not a valid choice.\n", ch);}printf("Enter a to buy artichokes, b for beets, "); printf("c forcarrots, q to quit: ");}cost_artichokes = price_artichokes * lb_artichokes; cost_beets =price_beets * lb_beets; cost_carrots = price_carrots * lb_carrots;cost_total = cost_artichokes + cost_beets + cost_carrots; lb_total =lb_artichokes + lb_beets + lb_carrots; if (lb_total <= 0)shipping = 0.0; else if (lb_total < 5.0) shipping = under5;else if (lb_total < 20) shipping = under20; elseshipping = base20 + extralb * lb_total; if(cost_total > 100.0)discount = DISCOUNT_RATE * cost_total; elsediscount = 0.0;final_total = cost_total + shipping - discount; printf("Yourorder:\n");printf("%.2f lbs of artichokes at $%.2f per pound:$ %.2f\n",lb_artichokes, price_artichokes, cost_artichokes); printf("%.2f lbs ofbeets at $%.2f per pound: $%.2f\n", lb_beets, price_beets,cost_beets); printf("%.2f lbs of carrots at $%.2f per pound: $%.2f\n",lb_carrots, price_carrots, cost_carrots); printf("Total cost of vegetables: $%.2f\n", cost_total); if (cost_total > 100)printf("Volume discount: $%.2f\n", discount);printf("Shipping: $%.2f\n", shipping); printf("Totalcharges: $%.2f\n", final_total); return 0; }Chapter 8 Programming ExercisesPE 8-‐1/* Programming Exercise 8-1 */#include <stdio.h>int main(void) { int ch; int ct =0; while ((ch = getchar()) != EOF)ct++;printf("%d characters read\n", ct);return0;}PE 8-‐3/* Programming Exercise 8-3 *//* Using ctype.h eliminates need to assume consecutive coding */#include <stdio.h> #include<ctype.h> int main(void){ int ch; unsigned longuct = 0; unsigned long lct= 0; unsigned long oct = 0;while ((ch = getchar()) != EOF)if (isupper(ch)) uct++;else if (islower(ch)) lct++;else oct++;printf("%lu uppercase characters read\n", uct); printf("%lu lowercase characters read\n", lct); printf("%lu other characters read\n", oct);return0;}/* or you could use if (ch >='A' && ch <= 'Z') uct++;else if (ch >= 'a' && ch <= 'z')lct++; else oct++;*/PE 8-‐5/* Programming Exercise 8-5 *//* binaryguess.c -- an improved number-guesser *//* but relies upon truthful, correct responses */#include <stdio.h> #include <ctype.h>int main(void) { int high = 100;int low = 1; int guess = (high +low) / 2; char response;printf("Pick an integer from 1 to 100. I will try to guess "); printf("it.\nRespond with a y if my guess is right, with"); printf("\na h if it is high, and with an l if it is low.\n"); printf("Uh...is your number %d?\n", guess);while ((response = getchar()) != 'y') /* get response */{if (response == '\n')continue;if (response != 'h' && response != 'l'){printf("I don't understand that response. Please enter h for\n"); printf("high, l for low, or y for correct.\n"); continue;}if (response == 'h')high = guess - 1; else if(response == 'l') low =guess + 1; guess = (high + low)/ 2;printf("Well, then, is it %d?\n", guess);}printf("I knew I could do it!\n"); return 0;}PE 8-‐7/* Programming Exercise 8-7 */#include <stdio.h>#include <ctype.h>#include <stdio.h>#define BASEPAY1 8.75 // $8.75 per hour#define BASEPAY2 9.33 // $9.33 per hour#define BASEPAY3 10.00 // $10.00 per hour#define BASEPAY4 11.20 // $11.20 per hour#define BASEHRS 40 // hours at basepay#define OVERTIME 1.5 // 1.5 time#define AMT1 300 // 1st rate tier#define AMT2 150 // 2st rate tier#define RATE1 0.15 // rate for 1st tier#define RATE2 0.20 // rate for 2nd tier #defineRATE3 0.25 // rate for 3rd tier intgetfirst(void); void menu(void); int main(void){ double hours;double gross;double net;double taxes;double pay; charresponse;menu();while ((response = getfirst()) != 'q'){if (response == '\n') /* skip over newlines */ continue;response = tolower(response); /* accept A as a, etc. */ switch(response){case 'a': pay = BASEPAY1; break;case 'b': pay = BASEPAY2; break; case 'c':pay = BASEPAY3; break; case 'd': pay = BASEPAY4;break;default : printf("Please enter a, b, c, d, or q.\n");menu();continue; // go to beginning of loop}printf("Enter the number of hours worked this week: ");scanf("%lf", &hours); if (hours <= BASEHRS) gross =hours * pay; elsegross = BASEHRS * pay + (hours - BASEHRS) * pay * OVERTIME; if(gross <= AMT1) taxes = gross * RATE1; else if (gross <= AMT1 +AMT2)taxes = AMT1 * RATE1 + (gross - AMT1) * RATE2; elsetaxes = AMT1 * RATE1 + AMT2 * RATE2 + (gross - AMT1 - AMT2) * RATE3; net = gross - taxes;printf("gross: $%.2f; taxes: $%.2f; net: $%.2f\n", gross, taxes,net); menu(); }printf("Done.\n");return 0;}void menu(void){printf("********************************************************""*********\n");printf("Enter the letter corresponding to the desired pay rate"" or action:\n");printf("a) $%4.2f/hr b) $%4.2f/hr\n", BASEPAY1,BASEPAY2);printf("c) $%5.2f/hr d) $%5.2f/hr\n", BASEPAY3,BASEPAY4); printf("q) quit\n");printf("********************************************************""*********\n");}int getfirst(void){ int ch;ch = getchar(); while(isspace(ch)) ch =getchar(); while(getchar() != '\n')continue; return ch;}Chapter 9 Programming ExercisesPE 9-‐1/* Programming Exercise 9-1 */#include <stdio.h>double min(double, double); intmain(void){double x, y; printf("Enter two numbers (qto quit): "); while (scanf("%lf %lf", &x, &y) == 2){ printf("The smaller number is %f.\n", min(x,y)); printf("Next two values (q to quit): ");}printf("Bye!\n");return 0;}double min(double a, double b){return a < b ? a : b;}/* alternative implementation doublemin(double a, double b){ if (a < b)return a; elsereturn b;}*/PE 9-‐3/* Programming Exercise 9-3 */#include <stdio.h>void chLineRow(char ch, int c, int r); intmain(void){ char ch; int col, row; printf("Entera character (# to quit): "); while ( (ch =getchar()) != '#'){ if (ch =='\n') continue;printf("Enter number of columns and number of rows: "); if (scanf("%d %d", &col, &row) != 2) break; chLineRow(ch, col, row);printf("\nEnter next character (# to quit): ");}printf("Bye!\n");return 0;}// start rows and cols at 0 voidchLineRow(char ch, int c, int r){int col, row;for (row = 0; row < r ; row++){for (col = 0; col < c; col++)putchar(ch); putchar('\n');}return;}PE 9-‐5/* Programming Exercise 9-5 */#include <stdio.h>void larger_of(double *p1, double *p2); intmain(void){double x, y; printf("Enter two numbers (qto quit): "); while (scanf("%lf %lf", &x, &y) == 2){larger_of(&x, &y);printf("The modified values are %f and %f.\n", x, y); printf("Next two values (q to quit): ");}printf("Bye!\n");return 0;}void larger_of(double *p1, double *p2){ if (*p1 > *p2)*p2 = *p1; else*p1 = *p2;}// alternatively:/*void larger_of(double *p1, double *p2){*p1= *p2 = *p1 > *p2 ? *p1 : *p2;}*/PE 9-‐8/* Programming Exercise 9-8 */ #include<stdio.h>double power(double a, int b); /* ANSI prototype */ int main(void){ double x, xpow; int n; printf("Enter a number and theinteger power"); printf(" to which\nthe number will be raised.Enter q"); printf(" to quit.\n"); while (scanf("%lf%d", &x, &n)== 2){ xpow = power(x,n); /* function call */printf("%.3g to the power %d is %.5g\n", x, n, xpow);printf("Enter next pair of numbers or q to quit.\n");} printf("Hope you enjoyed this power trip -- bye!\n");return 0;} double power(double a, int b) /* function definition */{ double pow = 1;int i; if (b ==0) { if (a== 0)printf("0 to the 0 undefined; using 1 as the value\n"); pow =1.0; } else if (a == 0) pow = 0.0; else if (b > 0) for(i = 1;i <= b; i++) pow *= a; else /* b < 0 */ pow = 1.0 / power(a, - b);return pow; /* return the value of pow */}PE 9-‐10/* Programming Exercise 9-10 */ #include <stdio.h>void to_base_n(int x, int base); int main(void){ int number; int b; int count;printf("Enter an integer (q to quit):\n"); while(scanf("%d", &number) == 1){ printf("Enter number base (2-10): ");while ((count = scanf("%d", &b))== 1&& (b < 2 || b > 10)){printf("base should be in the range 2-10: ");} if (count !=1) break;printf("Base %d equivalent: ", b);to_base_n(number, b); putchar('\n');printf("Enter an integer (q to quit):\n");} printf("Done.\n");return 0;}void to_base_n(int x, int base) /* recursive function */{ int r; r = x % base; if(x >= base) to_base_n(x / base,base); putchar('0' + r); return;}Chapter 10 Programming ExercisesPE 10-‐1/* Programming Exercise 10-1 */#include <stdio.h>#define MONTHS 12 // number of months in a year #defineYRS 5 // number of years of data int main(void){// initializing rainfall data for 2010 - 2014 const floatrain[YRS][MONTHS] = {{4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.2,0.4,2.4,3.5,6.6},{8.5,8.2,1.2,1.6,2.4,0.0,5.2,0.9,0.3,0.9,1.4,7.3},{9.1,8.5,6.7,4.3,2.1,0.8,0.2,0.2,1.1,2.3,6.1,8.4},{7.2,9.9,8.4,3.3,1.2,0.8,0.4,0.0,0.6,1.7,4.3,6.2},{7.6,5.6,3.8,2.8,3.8,0.2,0.0,0.0,0.0,1.3,2.6,5.2}}; int year, month;float subtot, total;printf(" YEAR RAINFALL (inches)\n"); for(year = 0, total = 0; year < YRS; year++){ /* for each year, sum rainfall for each month */ for (month = 0, subtot = 0; month < MONTHS; month++) subtot += *(*(rain+ year) + month); printf("%5d %15.1f\n", 2010 + year, subtot);total += subtot; /* total for all years */}printf("\nThe yearly average is %.1f inches.\n\n", total/YRS); printf("MONTHLY AVERAGES:\n\n");printf(" Jan Feb Mar Apr May Jun Jul Aug Sep Oct "); printf(" Nov Dec\n");for (month = 0; month < MONTHS; month++){ /* for each month, sum rainfall over years */ for(year = 0, subtot =0; year < YRS; year++) subtot += *(*(rain +year) + month); printf("%4.1f ", subtot/YRS);} printf("\n");return 0;}PE 10-‐3/* Programming Exercise 10-3 */#include <stdio.h>#define LEN 10int max_arr(const int ar[], int n); voidshow_arr(const int ar[], int n);int main(void){int orig[LEN] = {1,2,3,4,12,6,7,8,9,10}; int max;show_arr(orig, LEN); max = max_arr(orig,LEN); printf("%d = largest value\n", max);return0;}int max_arr(const int ar[], int n){ int i; int max= ar[0];/* don't use 0 as initial max value -- fails if all array values are neg */for (i = 1; i < n; i++)if (max < ar[i]) max= ar[i]; return max;}void show_arr(const int ar[], int n){ int i; for (i = 0;i < n; i++) printf("%d ",ar[i]); putchar('\n');}PE 10-‐5/* Programming Exercise 10-5 */#include <stdio.h>#define LEN 10double max_diff(const double ar[], int n); voidshow_arr(const double ar[], int n);int main(void){double orig[LEN] = {1.1,2,3,4,12,61.3,7,8,9,10}; double max;show_arr(orig, LEN);max = max_diff(orig, LEN);printf("%g = maximum difference\n", max);return0;}double max_diff(const double ar[], int n){ int i; double max= ar[0]; double min =ar[0];for (i = 1; i < n; i++){if (max < ar[i])max = ar[i]; else if (min >ar[i]) min = ar[i];}return max - min;}void show_arr(const double ar[], int n)。
Chapter 2 Programming Exercises欧阳学文PE 2‐1/* Programming Exercise 21 */#include<stdio.h> intmain(void){ printf("GustavMahler\n");printf("Gustav\nMahler\n");printf("Gustav ");printf("Mahler\n");return 0;}PE 2‐3/* Programming Exercise 23 */#include<stdio.h> intmain(void){ int ageyears; /* age inyears */ int agedays; /*age in days *//* large ages may require the longtype */ ageyears = 101; agedays = 365 * ageyears;printf("An age of %d years is %d days.\n", ageyears, agedays); return 0;}PE 2‐4/* Programming Exercise 24 */#include<stdio.h>voidjolly(void);voiddeny(void);intmain(void){ jolly();jolly();jolly();deny();return0; }void jolly(void){printf("For he's a jolly good fellow!\n"); }void deny(void){printf("Which nobody can deny!\n"); }PE 2‐6/* Programming Exercise 26 */#include<stdio.h> intmain(void){ inttoes;toes =10;printf("toes = %d\n", toes);printf("Twice toes = %d\n", 2 * toes);printf("toes squared = %d\n", toes * toes);return 0;}/* or create two more variables, set them to 2 * toes and toes * toes */PE 2‐8/* Programming Exercise 28 */#include<stdio.h>voidone_three(void); voidtwo(void); intmain(void){printf("startingnow:\n");one_three();printf("done!\n");return 0;}void one_three(void){printf("one\n");two();printf("three\n");}void two(void){printf("two\n");}Chapter 3 Programming Exercises PE 3‐2/* Programming Exercise 32 */#include<stdio.h> intmain(void){intascii;printf("Enter an ASCII code: "); scanf("%d", &ascii);printf("%d is the ASCII code for %c.\n", ascii, ascii); return 0;}PE 3‐4/* Programming Exercise 34 */#include<stdio.h> intmain(void){ float num;printf("Enter a floatingpoint value: "); scanf("%f", &num);printf("fixedpointnotation: %f\n", num);printf("exponentialnotation: %e\n", num); printf("p notation: %a\n", num); return 0;}PE 3‐6/* Programming Exercise 36 */#include<stdio.h> intmain(void){float mass_mol = 3.0e23; /* mass of watermolecule in grams */ float mass_qt = 950; /*mass of quart of water in grams */ float quarts;float molecules;printf("Enter the number of quarts of water: ");scanf("%f", &quarts);molecules = quarts * mass_qt / mass_mol;printf("%f quarts of water contain %e molecules.\n", quarts, molecules); return 0;}Chapter 4 Programming ExercisesPE 4‐1/* Programming Exercise 41 */#include<stdio.h> intmain(void){ charfname[40];charlname[40];printf("Enter your first name: "); scanf("%s", fname); printf("Enteryour last name: ");scanf("%s", lname);printf("%s, %s\n", lname, fname); return 0;}PE 4‐4/* Programming Exercise 44 */ #include<stdio.h> intmain(void){ floatheight;charname[40];printf("Enter your height in inches: "); scanf("%f",&height); printf("Enter yourname: "); scanf("%s", name);printf("%s, you are %.3f feet tall\n", name, height / 12.0);return0;}PE 4‐7/* Programming Exercise 47 */#include<stdio.h>#include<float.h> intmain(void){ float ot_f = 1.0/ 3.0; doubleot_d = 1.0 / 3.0;printf(" float values:");printf("%.4f %.12f %.16f\n", ot_f, ot_f, ot_f); printf("double values: ");printf("%.4f %.12f %.16f\n", ot_d,ot_d, ot_d);printf("FLT_DIG: %d\n", FLT_DIG); printf("DBL_DIG: %d\n",DBL_DIG); return 0;}Chapter 5 Programming Exercises PE 5‐1/* Programming Exercise 51 */#include<stdio.h> intmain(void){ const intminperhour = 60;int minutes, hours,mins;printf("Enter the number of minutes to convert: "); scanf("%d", &minutes); while (minutes > 0 ){ hours = minutes/ minperhour; mins =minutes % minperhour;printf("%d minutes = %d hours, %d minutes\n", minutes, hours, mins); printf("Enter next minutes value (0 to quit): "); scanf("%d", &minutes);}printf("Bye\n");return0;}PE 5‐3/* Programming Exercise 53 */#include<stdio.h> intmain(void){ const intdaysperweek = 7;int days, weeks,day_rem;printf("Enter the number ofdays: "); scanf("%d", &days);while (days > 0){ weeks = days /daysperweek; day_rem= days % daysperweek;printf("%d days are %d weeks and %ddays.\n", days, weeks, day_rem);printf("Enter the number of days (0 or less to end): "); scanf("%d", &days);}printf("Done!\n");return 0;}PE 5‐5/* Programming Exercise 55*/ #include <stdio.h>int main(void) /* finds sum of first n integers */{int count,sum;int n;printf("Enter the upperlimit: "); scanf("%d", &n);count = 0;sum = 0;while (count++ < n)sum = sum + count;printf("sum = %d\n",sum); return 0;}PE 5‐7/* ProgrammingExercise 57 */#include <stdio.h>voidshowCube(double x);int main(void) /* finds cube of entered number */ { double val;printf("Enter a floatingpointvalue: "); scanf("%lf", &val);showCube(val); return 0; }void showCube(double x){printf("The cube of %e is %e.\n", x, x*x*x );}Chapter 6 Programming ExercisesPE 6‐1/* pe61.c *//* this implementation assumes the character codes */ /* are sequential, as they are in ASCII. */#include <stdio.h>#define SIZE 26 intmain( void ) { charlcase[SIZE]; int i;for (i = 0; i < SIZE;i++) lcase[i] = 'a'+ i; for (i = 0; i <SIZE; i++)printf("%c", lcase[i]);printf("\n");return 0;}PE 6‐3/* pe63.c *//* this implementation assumes the character codes */ /* are sequential, as they are in ASCII. */#include<stdio.h> intmain( void ){ char let= 'F';char start;char end;for (end = let; end >= 'A'; end) {for (start = let; start >= end; start) printf("%c", start); printf("\n");}return0;}PE 6‐6/* pe66.c */#include<stdio.h> intmain( void ){ int lower,upper, index; intsquare, cube;printf("Enter startinginteger: "); scanf("%d",&lower); printf("Enterending integer: ");scanf("%d", &upper);printf("%5s %10s %15s\n", "num", "square", "cube"); for (index = lower;index <= upper; index++){ square =index * index;cube = index * square;printf("%5d %10d %15d\n", index, square, cube); }return0;}PE 6‐8/* pe68.c */#include<stdio.h> intmain( void ){ double n, m;doubleres;printf("Enter a pair of numbers: ");while (scanf("%lf %lf", &n, &m) == 2){res = (n m) / (n * m);printf("(%.3g %.3g)/(%.3g*%.3g) = %.5g\n", n, m, n, m, res); printf("Enter next pair (nonnumeric to quit): ");}return 0;}PE 6‐11/* pe611.c */#include<stdio.h>#defineSIZE 8 intmain( void ){ intvals[SIZE];int i;printf("Please enter %dintegers.\n", SIZE); for (i = 0; i <SIZE; i++) scanf("%d",&vals[i]);printf("Here, in reverse order, are the values you entered:\n"); for (i = SIZE 1; i >= 0; i) printf("%d ", vals[i]); printf("\n"); return 0;}PE 6‐13/* pe613.c *//* This version starts with the 0 power */#include<stdio.h>#defineSIZE 8 intmain( void ){inttwopows[SIZE];int i;int value = 1; /* 2 to the 0 */for (i = 0; i < SIZE; i++){ twopows[i]= value; value*= 2;}i =0;do{printf("%d ",twopows[i]);i++; } while (i <SIZE); printf("\n"); return 0;}PE 6‐14/* pe14.c *//* Programming Exercise 614 */ #include<stdio.h>#defineSIZE 8 intmain(void){ doublearr[SIZE];doublearr_cumul[SIZE];int i;printf("Enter %d numbers:\n", SIZE);for (i = 0; i < SIZE; i++){printf("value #%d: ", i+ 1); scanf("%lf",&arr[i]); /* or scanf("%lf", arr + i); */}arr_cumul[0] = arr[0]; /* set first element */ for (i = 1; i < SIZE; i++) arr_cumul[i] = arr_cumul[i1] + arr[i]; for (i = 0; i < SIZE;i++) printf("%8g ",arr[i]); printf("\n");for (i = 0; i < SIZE; i++)printf("%8g ", arr_cumul[i]);printf("\n");return 0;}PE 6‐16/* pe616.c */#include <stdio.h>#define RATE_SIMP 0.10#defineRATE_COMP0.05 #defineINIT_AMT 100.0int main( void ){double daphne =INIT_AMT;double deidre =INIT_AMT; intyears = 0;while (deidre <= daphne){ daphne +=RATE_SIMP * INIT_AMT; deidre += RATE_COMP * deidre;++years;}printf("Investment values after %d years:\n", years); printf("Daphne: $%.2f\n", daphne); printf("Deidre: $%.2f\n", deidre); return 0;}Chapter 7 Programming Exercises PE 7‐1/* ProgrammingExercise 71 */#include <stdio.h>int main(void){ charch; intsp_ct = 0;int nl_ct =0; intother = 0;while ((ch =getchar()) != '#'){if (ch == ' ')sp_ct++; elseif (ch == '\n')nl_ct++; elseother++;}printf("spaces: %d, newlines: %d, others: %d\n", sp_ct, nl_ct, other);return0;}PE 7‐3/* Programming Exercise 73 */#include<stdio.h> intmain(void){ int n;double sumeven= 0.0; intct_even = 0;double sumodd =0.0; int ct_odd= 0;while (scanf("%d", &n) == 1 && n != 0){if (n % 2 == 0){sumeven += n;++ct_even;}else // n % 2 is either 1 or 1{sumodd += n;++ct_odd;} }printf("Number of evens: %d",ct_even); if (ct_even > 0)printf(" average: %g", sumeven / ct_even); putchar('\n');printf("Number of odds: %d",ct_odd); if (ct_odd > 0)printf(" average: %g", sumodd / ct_odd); putchar('\n');printf("\ndone\n");return0;}PE 7‐5/* Programming Exercise 75 */#include<stdio.h> intmain(void){ charch; intct1 = 0;int ct2 =0;while ((ch=getchar())!= '#'){switch(ch){case '.' : putchar('!'); ++ct1;break; case '!' :putchar('!');putchar('!');++ct2;break; default :putchar(ch);} }printf("%d replacement(s) of . with !\n", ct1); printf("%d replacement(s) of ! with !!\n", ct2);return0;}PE 7‐7// Programming Exercise 77#include <stdio.h>#define BASEPAY 10 // $10 per hour#define BASEHRS 40 // hours at basepay #define OVERTIME 1.5 // 1.5 time#define AMT1 300 // 1st rate tier#define AMT2 150 // 2st rate tier#define RATE1 0.15 // rate for 1st tier#define RATE2 0.20 // rate for2nd tier #define RATE3 0.25 //rate for 3rd tier int main(void){doublehours;double gross;double net;double taxes;printf("Enter the number of hours workedthis week: "); scanf("%lf", &hours); if(hours <= BASEHRS) gross = hours *BASEPAY; elsegross = BASEHRS * BASEPAY + (hours BASEHRS)* BASEPAY * OVERTIME; if (gross <= AMT1)taxes = gross * RATE1; else if (gross <= AMT1 + AMT2)taxes = AMT1 * RATE1 + (gross AMT1)* RATE2; elsetaxes = AMT1 * RATE1 + AMT2 * RATE2 + (grossAMT1 AMT2) * RATE3; net = gross taxes;printf("gross: $%.2f; taxes: $%.2f; net: $%.2f\n", gross, taxes, net);return0;}PE 7‐9/* Programming Exercise 79 */#include<stdio.h>#include<stdbool.h> intmain(void){intlimit;int num;int div;bool numIsPrime; // use int if stdbool.h not available printf("Enter a positive integer: ");while (scanf("%d", &limit) == 1 &&limit > 0){if (limit > 1)printf("Here are the prime numbers upthrough %d\n", limit); elseprintf("No primes.\n");for (num = 2; num <= limit;num++){for (div = 2, numIsPrime = true; (div * div) <= num; div++) if (num % div == 0) numIsPrime = false; if (numIsPrime)printf("%d is prime.\n", num);}printf("Enter a positive integer (q to quit): ");}printf("Done!\n");return 0;}PE 7‐11/* pe711.c *//* Programming Exercise 711 */#include<stdio.h>#include<ctype.h> intmain(void){const doubleprice_artichokes = 2.05; const double price_beets = 1.15; const doubleprice_carrots = 1.09; const double DISCOUNT_RATE = 0.05; const double under5 = 6.50; const double under20 = 14.00; const double base20 = 14.00; const double extralb = 0.50;charch;doublelb_artichokes = 0;double lb_beets =0; doublelb_carrots = 0;double lb_temp;double lb_total;doublecost_artichokes;doublecost_beets;doublecost_carrots;double cost_total;doublefinal_total;double discount;double shipping;printf("Enter a to buy artichokes, b for beets, "); printf("c for carrots, q to quit: "); while ((ch = getchar()) != 'q' && ch != 'Q'){ if (ch == '\n') continue; while(getchar() != '\n')continue; ch =tolower(ch);switch (ch) {case 'a' : printf("Enter pounds of artichokes: "); scanf("%lf",&lb_temp); lb_artichokes +=lb_temp; break;case 'b' : printf("Enter pounds ofbeets: "); scanf("%lf",&lb_temp); lb_beets +=lb_temp; break;case 'c' : printf("Enter pounds of carrots: "); scanf("%lf",&lb_temp); lb_carrots +=lb_temp; break;default : printf("%c is not a valid choice.\n", ch);}printf("Enter a to buy artichokes, b for beets, "); printf("c for carrots, q to quit: ");}cost_artichokes = price_artichokes *lb_artichokes; cost_beets = price_beets *lb_beets; cost_carrots = price_carrots *lb_carrots; cost_total = cost_artichokes + cost_beets + cost_carrots; lb_total =lb_artichokes + lb_beets + lb_carrots; if (lb_total <= 0) shipping = 0.0; else if (lb_total < 5.0) shipping = under5; else if (lb_total < 20) shipping = under20; else shipping = base20 + extralb *lb_total; if (cost_total > 100.0)discount =DISCOUNT_RATE * cost_total;else discount = 0.0;final_total = cost_total + shipping discount; printf("Your order:\n");printf("%.2f lbs of artichokes at $%.2f per pound:$ %.2f\n", lb_artichokes, price_artichokes, cost_artichokes);printf("%.2f lbs of beets at $%.2f per pound: $%.2f\n", lb_beets, price_beets,cost_beets); printf("%.2f lbs of carrots at $%.2f per pound: $%.2f\n", lb_carrots, price_carrots, cost_carrots); printf("Total cost of vegetables: $%.2f\n", cost_total); if (cost_total > 100)printf("Volume discount: $%.2f\n", discount); printf("Shipping: $%.2f\n", shipping); printf("Total charges:$%.2f\n", final_total); return 0; } Chapter 8 Programming Exercises PE 8‐1/* Programming Exercise 81 */#include <stdio.h>int main(void) { int ch;int ct = 0; while((ch = getchar()) != EOF)ct++;printf("%d characters read\n", ct);return0;}PE 8‐3/* Programming Exercise 83 *//* Using ctype.h eliminates need to assume consecutive coding */#include<stdio.h>#include<ctype.h> intmain(void){ int ch;unsigned long uct= 0; unsignedlong lct = 0;unsigned long oct= 0;while ((ch =getchar()) != EOF)if (isupper(ch))uct++; else if(islower(ch))lct++; elseoct++;printf("%lu uppercase characters read\n", uct); printf("%lu lowercase characters read\n", lct); printf("%lu other characters read\n", oct);return0;}/* or you coulduse if (ch >= 'A'&& ch <= 'Z')uct++;else if (ch >= 'a' && ch<= 'z') lct++; elseoct++;*/PE 8‐5/* Programming Exercise 85 *//* binaryguess.c an improved numberguesser */ /* but relies upon truthful, correct responses */#include <stdio.h>#include <ctype.h>int main(void) { inthigh = 100; int low= 1; int guess =(high + low) / 2;char response;printf("Pick an integer from 1 to 100. I will try to guess "); printf("it.\nRespond with a y if my guess is right, with");printf("\na h if it is high, and with an l if it is low.\n");printf("Uh...is your number %d?\n", guess);while ((response = getchar()) != 'y') /* get response */{if (response == '\n')continue;if (response != 'h' && response != 'l'){printf("I don't understand that response. Please enterh for\n"); printf("high, l for low, or y for correct.\n"); continue;}if (response == 'h')high = guess 1;else if (response == 'l')low = guess + 1;guess = (high + low)/ 2;printf("Well, then, is it %d?\n", guess);}printf("I knew I could doit!\n"); return 0;}PE 8‐7/* Programming Exercise 87 */#include <stdio.h>#include <ctype.h>#include <stdio.h>#define BASEPAY1 8.75 // $8.75 per hour #define BASEPAY2 9.33 // $9.33 per hour #define BASEPAY3 10.00 // $10.00 per hour #define BASEPAY4 11.20 // $11.20 per hour #define BASEHRS 40 // hours at basepay #define OVERTIME 1.5 // 1.5 time#define AMT1 300 // 1st rate tier#define AMT2 150 // 2st rate tier#define RATE1 0.15 // rate for 1st tier #define RATE2 0.20 // ratefor 2nd tier #define RATE3 0.25// rate for 3rd tier int getfirst(void);void menu(void); int main(void){ doublehours;doublegross;double net;doubletaxes;double pay;charresponse;menu();while ((response = getfirst()) != 'q'){if (response == '\n') /* skip over newlines */ continue;response = tolower(response); /* accept A as a, etc.*/ switch (response){case 'a': pay = BASEPAY1;break; case 'b': pay =BASEPAY2; break; case 'c':pay = BASEPAY3; break; case'd': pay = BASEPAY4; break;default : printf("Please enter a, b, c, d, or q.\n"); menu();continue; // go to beginning of loop}printf("Enter the number of hours workedthis week: "); scanf("%lf", &hours); if(hours <= BASEHRS) gross = hours *pay; elsegross = BASEHRS * pay + (hours BASEHRS) *pay * OVERTIME; if (gross <= AMT1)taxes = gross * RATE1; else if (gross <= AMT1 +AMT2)taxes = AMT1 * RATE1 + (gross AMT1)* RATE2; elsetaxes = AMT1 * RATE1 + AMT2 * RATE2 + (gross AMT1 AMT2) * RATE3; net = gross taxes;printf("gross: $%.2f; taxes: $%.2f; net: $%.2f\n", gross, taxes, net); menu(); }printf("Done.\n");return0;}void menu(void){printf("********************************************************""*********\n");printf("Enter the letter corresponding to the desired pay rate"" or action:\n");printf("a) $%4.2f/hr b) $%4.2f/hr\n", BASEPAY1, BASEPAY2);printf("c) $%5.2f/hr d) $%5.2f/hr\n", BASEPAY3, BASEPAY4); printf("q)quit\n");printf("*********************************************** *********""*********\n");}int getfirst(void){intch;ch = getchar();while (isspace(ch))ch = getchar();while (getchar() !='\n') continue;return ch;}Chapter 9 Programming ExercisesPE 9‐1/* Programming Exercise 91 */#include <stdio.h>double min(double,double); int main(void){double x, y; printf("Entertwo numbers (q to quit): ");while (scanf("%lf %lf", &x, &y) ==2){ printf("The smaller numberis %f.\n", min(x,y)); printf("Next two values (q to quit): ");}printf("Bye!\n");return0;}double min(double a, double b){return a < b ? a : b;}/* alternative implementation doublemin(double a, double b){ if (a< b)return a;elsereturn b;}*/PE 9‐3/* Programming Exercise 93 */#include <stdio.h>void chLineRow(char ch, int c,int r); int main(void){ char ch; int col, row; printf("Enter a character (# to quit): "); while ( (ch = getchar()) != '#') { if (ch== '\n')continue;printf("Enter number of columns and number of rows: "); if (scanf("%d %d", &col, &row) != 2) break; chLineRow(ch, col, row);printf("\nEnter next character (# to quit): "); }printf("Bye!\n");return0;}// start rows and cols at 0void chLineRow(char ch,int c, int r){int col, row;for (row = 0; row < r ; row++){for (col = 0; col < c;col++) putchar(ch);putchar('\n');}return;}PE 9‐5/* Programming Exercise 95 */#include <stdio.h>void larger_of(double *p1,double *p2); int main(void){double x, y; printf("Entertwo numbers (q to quit): ");while (scanf("%lf %lf", &x, &y) ==2){larger_of(&x, &y);printf("The modified values are %f and %f.\n", x, y); printf("Next two values (q to quit): ");}printf("Bye!\n");return0;}void larger_of(double *p1, double *p2) { if(*p1 > *p2)*p2 = *p1;else*p1 = *p2;}// alternatively:/*void larger_of(double *p1, double *p2) {*p1= *p2 = *p1 > *p2 ? *p1 : *p2; }*/PE 9‐8/* Programming Exercise 98*/ #include <stdio.h>double power(double a, int b); /* ANSI prototype */ int main(void) { double x,xpow; int n; printf("Enter a number andthe integer power"); printf(" to which\nthe number will be raised. Enter q"); printf(" toquit.\n"); while (scanf("%lf%d", &x, &n)== 2){ xpow = power(x,n); /* function call */ printf("%.3g to the power %dis %.5g\n", x, n, xpow); printf("Enter nextpair of numbers or q to quit.\n");} printf("Hope you enjoyed this powertrip bye!\n"); return 0;} double power(double a, int b) /* function definition */{ doublepow = 1;int i; if(b == 0){ if (a== 0)printf("0 to the 0 undefined; using 1 as thevalue\n"); pow = 1.0; } else if (a == 0) pow = 0.0; else if (b > 0) for(i = 1; i <= b;i++) pow *= a; else /* b < 0 */ pow = 1.0 / power(a, b);return pow; /* return the value of pow */ }PE 9‐10/* Programming Exercise 910 */#include <stdio.h> voidto_base_n(int x, int base); intmain(void) { int number; int b;int count; printf("Enter aninteger (q to quit):\n"); while(scanf("%d", &number) == 1){ printf("Enter numberbase (210): "); while ((count= scanf("%d", &b))== 1&& (b < 2 || b > 10)){printf("base should be in the range 210: ");} if(count != 1)break;。
1、//Reverse.cpp#include <iostream>#include <string>using namespace std;boolisReverse(const string &s1, const string &s2);int main(){string words;cout<< "Enter a string (quit to quit): \n";while (cin>> words&&words != "quit"){stringrwords(words.rbegin(), words.rend());cout<< "words: " << words <<endl;if (isReverse(rwords, words))cout<< words << " is reverse words.\n";elsecout<< words << " is not reverse words.\n";cout<< "Enter a next words (quit to quit): \n";}system("pause");return 0;}boolisReverse(const string &s1, const string &s2){if (pare(s2))return false;elsereturn true;}2、//Reverse.cpp#include <iostream>#include <string>#include <cctype>using namespace std;boolisReverse(const string &s1, const string &s2); voidToLower(string &s1);int main(){string words;cout<< "Enter a string (quit to quit): \n";getline(cin, words);while (words != "quit"){ToLower(words);stringrwords(words.rbegin(), words.rend());cout<< "words: " << words <<endl;if (isReverse(rwords, words))cout<< words << " is reverse words.\n";elsecout<< words << " is not reverse words.\n";cout<< "Enter a next words (quit to quit): \n";getline(cin, words);}system("pause");return 0;}boolisReverse(const string &s1, const string &s2){if (pare(s2))return false;elsereturn true;}voidToLower(string &s1){unsignedinti = 0;while (i< s1.length()){if (isalpha(s1[i])){s1[i] = tolower(s1[i]);i++;}elses1.replace(i, s1.size(), s1, i + 1, s1.size());}}3、//hangman.cpp#include <iostream>#include <string>#include <cstdlib>#include <ctime>#include <cctype>#include <fstream>#include <vector>using namespace std;vector<string> wordlist;voidFillWord();int main(){srand(time(0));char play;cout<< "Will you play a word game? <y/n> ";cin>> play;play = tolower(play);FillWord();while (play == 'y'){string target = wordlist[rand() % wordlist.size()];int length = target.length();string attempt(length, '-');stringbadchars;int guesses = 6;cout<< "Guess my secret word. It has " << length<< " letters, and you guess\n"<< "one letter at a time. You get " << guesses<<" wrong guesses.\n";cout<< "Your word: " << attempt <<endl;while (guesses > 0 && attempt != target){char letter;cout<< "Guess a letter: ";cin>> letter;if (badchars.find(letter) != string::npos|| attempt.find(letter) != string::npos){cout<< "You already guessed that. Try again.\n";continue;}intloc = target.find(letter);if (loc == string::npos){cout<< "Oh,bad guess!\n";--guesses;badchars += letter;}else{cout<< "Good guess!\n";attempt[loc] = letter;loc - target.find(letter, loc + 1);while (loc != string::npos){attempt[loc] = letter;loc = target.find(letter, loc + 1);}}cout<< "Your word: " << attempt <<endl;if (attempt != target){if (badchars.length() > 0)cout<< "Bad choices: " <<badchars<<endl;cout<< guesses << " bad guesses left\n";}}if (guesses > 0)cout<< "That's right!\n";elsecout<< "Sorry, the word is " << target << ".\n";cout<< "Will you play another? <y/n> ";cin>> play;play = tolower(play);}cout<< "Bye\n";system("pause");return 0;}voidFillWord(){ifstream fin;string letter;fin.open("letters.txt");if (fin.is_open() == false){cerr<< "Can't open file. Bye.\n";exit(EXIT_FAILURE);}while (fin){fin>> letter;wordlist.push_back(letter);}fin.close();}//letters.txtapiary beetle cereal danger ensign florid garage healthinsult jackal keeper loaner manage nonce onset plaidquilt remote stolid train useful valid whence xenon yearn zippy4、//Reduce.cpp#include <iostream>#include <list>#include <algorithm>using namespace std;int reduce(long ar[], int n);voidoutlong(int n){ cout<< n << " "; }int main(){long a[10] = { 1, 3, 2, 4, 7, 6, 3, 4, 8, 10 };intnums = reduce(a, 10);cout<< "Numbers after reduce: " <<nums<<endl;system("pause");return 0;}int reduce(long ar[], int n){list<long>arr;arr.insert(arr.begin(), ar, ar + n);arr.sort();arr.unique();for_each(arr.begin(), arr.end(), outlong);cout<<endl;returnarr.size();}5、//Reduce.cpp#include <iostream>#include <list>#include <algorithm>#include <string>using namespace std;template<class T>int reduce(T ar[], int n);template<class T>voidoutlong(T n){ cout<< n << " "; }int main(){long a[10] = { 1, 3, 2, 4, 7, 6, 3, 4, 8, 10 };int nums1 = reduce(a, 10);cout<< "Numbers after reduce: " << nums1 <<endl;string b[10] = { "qwe", "qwe", "ret", "tyu", "dfg", "jkl", "iok", "kjl", "ads", "def" };int nums2 = reduce(b, 10);cout<< "Numbers after reduce: " << nums2 <<endl;system("pause");return 0;}template<class T>int reduce(T ar[], int n){list<T>arr;arr.insert(arr.begin(), ar, ar + n);arr.sort();arr.unique();for_each(arr.begin(), arr.end(), outlong<T>);cout<<endl;returnarr.size();}6、//bank.cpp#include <iostream>#include <cstdlib>#include <queue>#include <ctime>using namespace std;class Customer{private:long arrive;intprocesstime;public:Customer(){ arrive = processtime = 0; }void set(long when){processtime = rand() % 3 + 1;arrive = when;}long when()const{ return arrive; }intptime()const{ return processtime; }};typedef Customer Item;constint MIN_PER_HR = 60;boolnewcustomer(double x);int main(){srand(time(0));cout<< "Case Study: Bank of Heather Automatic Teller\n";cout<< "Enter maximum size of queue: ";intqs;cin>>qs;queue<Item> line;cout<< "Enter the number of simulation hours: ";int hours;cin>> hours;longcyclelimit = MIN_PER_HR*hours;cout<< "Enter the average number of customers per hour: ";doubleperhour;cin>>perhour;doublemin_per_cust;min_per_cust = MIN_PER_HR / perhour;Item temp;longturnaways = 0;long customers = 0;long served = 0;longsum_line = 0;intwait_time = 0;longline_wait = 0;for (int cycle = 0; cycle <cyclelimit; cycle++){if (newcustomer(min_per_cust)){if (line.size() == qs)turnaways++;else{customers++;temp.set(cycle);line.push(temp);}}if (wait_time<= 0 && !line.empty()){line.pop();wait_time = temp.ptime();line_wait += cycle - temp.when();served++;}if (wait_time> 0)wait_time--;sum_line += line.size();}if (customers > 0){cout<< "customers accepted: " << customers <<endl;cout<< " customers served: " << served <<endl;cout<< " turnaways: " <<turnaways<<endl;cout<< "average queue size: ";cout.precision(2);cout.setf(ios_base::fixed, ios_base::floatfield);cout<< (double)sum_line / cyclelimit<<endl;cout<< " average wait time: "<< (double)line_wait / served << " minutes\n"; }elsecout<< "No customers!\n";cout<< "Done!\n";system("pause");return 0;}boolnewcustomer(double x){return (rand()*x / RAND_MAX < 1);}7、//Lotto.cpp#include <vector>#include <iostream>#include <iterator>#include <algorithm>#include <ctime>using namespace std;vector<int> Lotto(int l1, int l2);void Show(int n);int main(){vector<int> winners;winners = Lotto(51, 6);for_each(winners.begin(), winners.end(), Show);system("pause");return 0;}vector<int> Lotto(int l1, int l2){vector<int>nums;vector<int> nums2;srand(time(0));for (inti = 0; i< l1; i++)nums.push_back(i);random_shuffle(nums.begin(), nums.end());for (inti = 0; i< l2; i++)nums2.push_back(nums[rand() % l1 + 1]);return nums2;}void Show(int n){cout<< "The winner is " << n <<endl;}8、//name.cpp#include <iostream>#include <string>#include <set>#include <algorithm>#include <iterator>int main(){using namespace std;ostream_iterator<string, char>out(cout, " ");string fname1;set<string> A;cout<< "Enter Mat's friends(quit to quit): \n";getline(cin, fname1);while (fname1 != "quit"){A.insert(fname1);getline(cin, fname1);}cout<< "Mat's friends: \n";copy(A.begin(), A.end(), out);cout<<endl;string fname2;set<string> B;cout<< "Enter Pat's friends(quit to quit): \n";getline(cin, fname1);while (fname1 != "quit"){B.insert(fname1);getline(cin, fname1);}cout<< "Pat's friends: \n";copy(B.begin(), B.end(), out);cout<<endl;cout<< "Union of Mat and Pat's friends: ";set_union(A.begin(), A.end(), B.begin(), B.end(), out);cout<<endl;system("pause");return 0;}9、//sorttime.cpp#include <iostream>#include <vector>#include <list>#include <ctime>#include <iterator>#include <algorithm>using namespace std;constint Size = 10000;int main(){clock_t start, end;vector<int> vi0(Size);list<int> li(Size);srand(time(0));for (inti = 0; i< Size; i++){vi0[i] = rand() % Size;}copy(vi0.begin(), vi0.end(), back_inserter(li));vector<int> vi(vi0);start = clock();sort(vi.begin(), vi.end());end = clock();cout<< "Time of Sort Vector:" << (double)(end - start) / CLOCKS_PER_SEC <<endl;start = clock();li.sort();end = clock();cout<< "Time of Sort List:" << (double)(end - start) / CLOCKS_PER_SEC <<endl;copy(vi0.begin(), vi0.end(), back_inserter(li));start = clock();copy(li.begin(), li.end(), back_inserter(vi));sort(vi.begin(), vi.end());copy(vi.begin(), vi.end(), back_inserter(li));end = clock();cout<< "Time of Sort List2:" << (double)(end - start) / CLOCKS_PER_SEC <<endl;system("pause");return 0;}10、//vect.cpp#include <iostream>#include <string>#include <vector>#include <algorithm>#include <memory>#include <cstdlib>using namespace std;struct Review{string title;int rating;double price;};bool operator<(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2); boolworseThan(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2); boolbetterThan(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2); boolworseThanP(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2); boolbetterThanP(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2); boolFillReview(shared_ptr<Review>&rr);shared_ptr<Review>make_Review();voidShowReview(shared_ptr<Review>&rr);int main(){vector<shared_ptr<Review>> books;shared_ptr<Review>temp(new Review);while (FillReview(temp)){books.push_back(temp);temp = make_Review();}if (books.size() > 0){vector<shared_ptr<Review>>sbook(books);cout<< "Thank you. You entered the following:\n"<<books.size() << " ratings:\n" << "Rating\tBook\tPrice\n";for_each(books.begin(), books.end(), ShowReview);charch;cout<< "Enter measures of sort:\no to old";cout<< "t to title, r to down rating,\nR to up rating""p to down price,P to up price, f(F) to shuffle,\nq to quit:";cin>>ch;while (tolower(ch) != 'q'){switch (ch){case'o':cout<< "Not Sort:\nRating\tBook\tPrice\n";for_each(books.begin(), books.end(), ShowReview);break;case't':sort(sbook.begin(), sbook.end());cout<< "Sorted by title:\nRating\tBook\tPrice\n";for_each(sbook.begin(), sbook.end(), ShowReview);break;case'r':sort(sbook.begin(), sbook.end(), worseThan);cout<< "Sorted by down rating:\nRating\tBook\tPrice\n";for_each(sbook.begin(), sbook.end(), ShowReview);break;case'R':sort(sbook.begin(), sbook.end(), betterThan);cout<< "Sorted by up rating:\nRating\tBook\tPrice\n";for_each(sbook.begin(), sbook.end(), ShowReview);break;case'p':sort(sbook.begin(), sbook.end(), worseThanP);cout<< "Sorted by down price:\nRating\tBook\tPrice\n";for_each(sbook.begin(), sbook.end(), ShowReview);break;case'P':sort(sbook.begin(), sbook.end(), betterThanP);cout<< "Sorted by up price:\nRating\tBook\tPrice\n";for_each(sbook.begin(), sbook.end(), ShowReview);break;case'F':case'f':random_shuffle(sbook.begin(), sbook.end());cout<< "After shuffling:\nRating\tBook\n";for_each(sbook.begin(), sbook.end(), ShowReview);break;default:cout<< "Error input!Input again!";break;}cout<< "Enter the next measures:\no to old";cout<< "t to title, r to down rating,\nR to up rating""p to down price,P to up price, q to quit:";cin>>ch;}}elsecout<< "No entries. ";cout<< "Bye.\n";system("pause");return 0;}bool operator<(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2) {if (r1->title < r2->title)return true;else if (r1->title == r2->title&&r1->rating < r2->rating)return true;elsereturn false;}boolworseThan(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2) {if (r1->rating < r2->rating)return true;elsereturn false;}boolbetterThan(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2) {if (r1->rating > r2->rating)return true;elsereturn false;}boolworseThanP(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2) {if (r1->price < r2->price)return true;elsereturn false;}boolbetterThanP(constshared_ptr<Review>&r1, constshared_ptr<Review>&r2) {if (r1->price > r2->price)return true;elsereturn false;}shared_ptr<Review>make_Review(){returnshared_ptr<Review>(new Review);}boolFillReview(shared_ptr<Review>&rr){cout<< "Enter book title (quit to quit): ";getline(cin, rr->title);if (rr->title == "quit")return false;cout<< "Enter book rating: ";cin>>rr->rating;cout<< "Enter book price: ";cin>>rr->price;if (!cin)return false;while (cin.get() != '\n')continue;return true;}voidShowReview(shared_ptr<Review>&rr){cout<<rr->rating << "\t" <<rr->title << "\t" <<rr->price <<endl;}。
第二章:开始学习C++n”;}<<endl;return 0;}double C2F(double t){return *t+32;}<<endl;return 0;}double convert(double t){return 63240*t;n";return 0;}style(miles per gallon):"<<endl;cout<<Euro_style<<" L/100Km = "<<*Euro_style<<" mpg\n";return 0;}Enter the automobile gasoline consumption figure inEuropean style(liters per 100 kilometers):Converts to . style(miles per gallon):L/100Km = mpgPress any key to continuestyle(miles per gallon):";double US_style;cin>>US_style;cout<<"Converts to European style(miles per gallon):"<<endl;cout<<US_style<<" mpg = "<< *US_style<<"L/100Km\n";return 0;}style(miles per gallon):19Converts to European style(miles per gallon):19 mpg = 100KmPress any key to continue第四章复合类型n";return 0;}rand<<endl<<snack[i].weight<<endl<<snack[i].calory<<endl<<endl;}return 0;}rand="A";eight=;snack[0].calory=200;snack[1].brand="B";snack[1].weight=;snack[1].calory=400;snack[2].brand="C";snack[2].weight=;snack[2].calory=500;for(int i=0;i<3;i++){cout << " brand: " << snack[i].brand << endl;cout << " weight: " << snack[i].weight << endl;cout << " calorie: " << snack[i].calory << endl<<endl;}delete [] snack;return 0;}et();car* ps=new car[num];for(int i=0;i<num;++i){cout<<"Car #"<<i+1<<":\n";cout<<"Please enter the make: ";getline(cin,ps[i].name);cout<<"Please enter the year made: ";(cin>>ps[i].year).get();}cout<<"Here is your collection:\n";for(int i=0;i<num;++i)cout<<ps[i].year<<" "<<ps[i].name<<endl;delete [] ps;return 0;}n";return 0;}n";return 0;};for(int k=0;k<=i;++k) cout<<"*";cout<<endl;}return 0;}。
Chapter 2 Programming ExercisesPE 2-‐1/* Programming Exercise 2-1 */#include <stdio.h> intmain(void){ printf("Gustav Mahler\n");printf("Gustav\nMahler\n");printf("Gustav ");printf("Mahler\n"); return 0;}PE 2-‐3/* Programming Exercise 2-3 */#include <stdio.h> intmain(void){ int ageyears; /* age in years */int agedays; /* age in days *//* large ages may require the long type */ageyears = 101; agedays = 365 * ageyears;printf("An age of %d years is %d days.\n", ageyears, agedays); return 0;}PE 2-‐4/* Programming Exercise 2-4 */#include <stdio.h>void jolly(void); voiddeny(void); intmain(void){ jolly(); jolly();jolly();deny();return 0; }void jolly(void){printf("For he's a jolly good fellow!\n");}void deny(void){printf("Which nobody can deny!\n");}PE 2-‐6/* Programming Exercise 2-6 */#include <stdio.h> intmain(void){ inttoes;toes = 10;printf("toes = %d\n", toes);printf("Twice toes = %d\n", 2 * toes); printf("toessquared = %d\n", toes * toes); return 0;}/* or create two more variables, set them to 2 * toes and toes * toes */PE 2-‐8/* Programming Exercise 2-8 */#include <stdio.h>void one_three(void);void two(void); intmain(void){printf("starting now:\n");one_three(); printf("done!\n");return 0;}void one_three(void){printf("one\n");two();printf("three\n");}void two(void){printf("two\n");}Chapter 3 Programming ExercisesPE 3-‐2/* Programming Exercise 3-2 */#include <stdio.h> intmain(void){int ascii;printf("Enter an ASCII code: "); scanf("%d",&ascii);printf("%d is the ASCII code for %c.\n", ascii, ascii); return 0;}PE 3-‐4/* Programming Exercise 3-4 */#include <stdio.h> intmain(void){ floatnum;printf("Enter a floating-point value: "); scanf("%f",&num);printf("fixed-point notation: %f\n", num);printf("exponential notation: %e\n", num);printf("p notation: %a\n", num); return 0;}PE 3-‐6/* Programming Exercise 3-6 */#include <stdio.h> intmain(void){float mass_mol = 3.0e-23; /* mass of water molecule in grams */ floatmass_qt = 950; /* mass of quart of water in grams */ float quarts;float molecules;printf("Enter the number of quarts of water: "); scanf("%f",&quarts);molecules = quarts * mass_qt / mass_mol;printf("%f quarts of water contain %e molecules.\n", quarts, molecules); return 0;}Chapter 4 Programming ExercisesPE 4-‐1/* Programming Exercise 4-1 */#include <stdio.h> intmain(void){ charfname[40]; charlname[40];printf("Enter your first name: ");scanf("%s", fname); printf("Enter yourlast name: "); scanf("%s", lname);printf("%s, %s\n", lname, fname); return0;}PE 4-‐4/* Programming Exercise 4-4 */#include <stdio.h> intmain(void){ floatheight; charname[40];printf("Enter your height in inches: ");scanf("%f", &height); printf("Enter your name:"); scanf("%s", name);printf("%s, you are %.3f feet tall\n", name, height / 12.0);return 0;}PE 4-‐7/* Programming Exercise 4-7 */#include <stdio.h>#include <float.h> intmain(void){ float ot_f = 1.0 / 3.0;double ot_d = 1.0 / 3.0;printf(" float values: ");printf("%.4f %.12f %.16f\n", ot_f, ot_f, ot_f); printf("doublevalues: ");printf("%.4f %.12f %.16f\n", ot_d, ot_d, ot_d);printf("FLT_DIG: %d\n", FLT_DIG); printf("DBL_DIG: %d\n",DBL_DIG); return 0;}Chapter 5 Programming ExercisesPE 5-‐1/* Programming Exercise 5-1 */#include <stdio.h> intmain(void){ const int minperhour = 60;int minutes, hours, mins;printf("Enter the number of minutes to convert: ");scanf("%d", &minutes); while (minutes > 0 ){ hours = minutes /minperhour; mins = minutes %minperhour;printf("%d minutes = %d hours, %d minutes\n", minutes, hours, mins); printf("Enter next minutes value (0 to quit): "); scanf("%d", &minutes);}printf("Bye\n");return 0;}PE 5-‐3/* Programming Exercise 5-3 */#include <stdio.h> intmain(void){ const int daysperweek = 7;int days, weeks, day_rem;printf("Enter the number of days: ");scanf("%d", &days); while (days > 0){ weeks = days / daysperweek;day_rem = days % daysperweek;printf("%d days are %d weeks and %d days.\n",days, weeks, day_rem);printf("Enter the number of days (0 or less to end): "); scanf("%d", &days);}printf("Done!\n");return 0;}PE 5-‐5/* Programming Exercise 5-5 */ #include<stdio.h>int main(void) /* finds sum of first n integers */{int count, sum;int n;printf("Enter the upper limit: ");scanf("%d", &n); count = 0;sum = 0; while (count++< n) sum = sum + count; printf("sum= %d\n", sum); return 0;}PE 5-‐7/* Programming Exercise 5-7 */#include <stdio.h> voidshowCube(double x);int main(void) /* finds cube of entered number */{ doubleval;printf("Enter a floating-point value: ");scanf("%lf", &val); showCube(val);return 0; }void showCube(double x){printf("The cube of %e is %e.\n", x, x*x*x );}Chapter 6 Programming ExercisesPE 6-‐1/* pe6-1.c *//* this implementation assumes the character codes *//* are sequential, as they are in ASCII. */#include <stdio.h> #define SIZE26 int main( void ) { charlcase[SIZE]; int i; for(i = 0; i < SIZE; i++)lcase[i] = 'a' + i; for (i = 0; i< SIZE; i++) printf("%c",lcase[i]); printf("\n");return 0;}PE 6-‐3/* pe6-3.c *//* this implementation assumes the character codes *//* are sequential, as they are in ASCII. */#include <stdio.h> intmain( void ){ char let ='F'; char start;char end;for (end = let; end >= 'A'; end--){for (start = let; start >= end; start--) printf("%c", start); printf("\n");}return 0;}PE 6-‐6/* pe6-6.c */ #include<stdio.h> int main( void ){ int lower, upper, index;int square, cube;printf("Enter starting integer: ");scanf("%d", &lower); printf("Enter endinginteger: "); scanf("%d", &upper);printf("%5s %10s %15s\n", "num", "square", "cube"); for (index = lower; index <= upper; index++){ square = index *index; cube = index * square;printf("%5d %10d %15d\n", index, square, cube);}return 0;}PE 6-‐8/* pe6-8.c */ #include<stdio.h> int main( void ){ double n,m; double res;printf("Enter a pair of numbers: ");while (scanf("%lf %lf", &n, &m) == 2){res = (n - m) / (n * m);printf("(%.3g - %.3g)/(%.3g*%.3g) = %.5g\n", n, m, n, m, res);printf("Enter next pair (non-numeric to quit): ");}return 0;}PE 6-‐11/* pe6-11.c */#include<stdio.h> #defineSIZE 8 intmain( void ){ intvals[SIZE]; int i;printf("Please enter %d integers.\n", SIZE);for (i = 0; i < SIZE; i++) scanf("%d", &vals[i]);printf("Here, in reverse order, are the values you entered:\n"); for(i = SIZE - 1; i >= 0; i--) printf("%d ", vals[i]); printf("\n"); return 0;}PE 6-‐13/* pe6-13.c *//* This version starts with the 0 power */#include<stdio.h> #defineSIZE 8 intmain( void ){int twopows[SIZE];int i;int value = 1; /* 2 to the 0 */for (i = 0; i < SIZE; i++){ twopows[i] =value; value *= 2;}i = 0;do {printf("%d ", twopows[i]);i++; } while (i < SIZE);printf("\n");return 0;}PE 6-‐14/* pe-14.c *//* Programming Exercise 6-14 */#include<stdio.h> #defineSIZE 8 int main(void){ double arr[SIZE];double arr_cumul[SIZE]; inti;printf("Enter %d numbers:\n", SIZE);for (i = 0; i < SIZE; i++){printf("value #%d: ", i + 1);scanf("%lf", &arr[i]); /* or scanf("%lf",arr + i); */}arr_cumul[0] = arr[0]; /* set first element */ for (i = 1; i < SIZE; i++)arr_cumul[i] = arr_cumul[i-1] + arr[i];for (i = 0; i < SIZE; i++)printf("%8g ", arr[i]); printf("\n");for (i = 0; i < SIZE; i++)printf("%8g ", arr_cumul[i]);printf("\n");return 0;}PE 6-‐16/* pe6-16.c */#include <stdio.h>#define RATE_SIMP 0.10#define RATE_COMP 0.05#define INIT_AMT 100.0 intmain( void ){double daphne = INIT_AMT;double deidre = INIT_AMT; intyears = 0;while (deidre <= daphne){ daphne += RATE_SIMP *INIT_AMT; deidre += RATE_COMP * deidre;++years; }printf("Investment values after %d years:\n", years);printf("Daphne: $%.2f\n", daphne); printf("Deidre: $%.2f\n",deidre); return 0;}Chapter 7 Programming ExercisesPE 7-‐1/* Programming Exercise 7-1 */#include <stdio.h> int main(void){ char ch;int sp_ct = 0;int nl_ct = 0;int other = 0;while ((ch =getchar()) != '#'){if (ch == ' ')sp_ct++; else if (ch =='\n') nl_ct++;else other++;}printf("spaces: %d, newlines: %d, others: %d\n", sp_ct, nl_ct, other);return 0;}PE 7-‐3/* Programming Exercise 7-3 */#include <stdio.h> intmain(void){ int n; doublesumeven = 0.0; int ct_even= 0; double sumodd = 0.0;int ct_odd = 0;while (scanf("%d", &n) == 1 && n != 0){if (n % 2 == 0){sumeven += n;++ct_even;}else // n % 2 is either 1 or -1{sumodd += n;++ct_odd;}}printf("Number of evens: %d", ct_even); if(ct_even > 0)printf(" average: %g", sumeven / ct_even);putchar('\n');printf("Number of odds: %d", ct_odd); if(ct_odd > 0)printf(" average: %g", sumodd / ct_odd);putchar('\n'); printf("\ndone\n");return 0;}PE 7-‐5/* Programming Exercise 7-5 */#include <stdio.h> intmain(void){ char ch;int ct1 = 0;int ct2 = 0;while ((ch =getchar()) != '#'){switch(ch){case '.' : putchar('!');++ct1; break;case '!' : putchar('!');putchar('!'); ++ct2; break; default : putchar(ch);}}printf("%d replacement(s) of . with !\n", ct1); printf("%d replacement(s) of ! with !!\n", ct2);return 0;}PE 7-‐7// Programming Exercise 7-7#include <stdio.h>#define BASEPAY 10 // $10 per hour#define BASEHRS 40 // hours at basepay#define OVERTIME 1.5 // 1.5 time#define AMT1 300 // 1st rate tier#define AMT2 150 // 2st rate tier#define RATE1 0.15 // rate for 1st tier#define RATE2 0.20 // rate for 2nd tier #defineRATE3 0.25 // rate for 3rd tier int main(void){double hours;double gross; doublenet; double taxes;printf("Enter the number of hours worked this week: ");scanf("%lf", &hours); if (hours <= BASEHRS) gross = hours* BASEPAY; elsegross = BASEHRS * BASEPAY + (hours - BASEHRS) * BASEPAY * OVERTIME; if(gross <= AMT1) taxes = gross * RATE1; else if (gross <= AMT1 + AMT2) taxes = AMT1 * RATE1 + (gross - AMT1) * RATE2; elsetaxes = AMT1 * RATE1 + AMT2 * RATE2 + (gross - AMT1 - AMT2) * RATE3; net = gross - taxes;printf("gross: $%.2f; taxes: $%.2f; net: $%.2f\n", gross, taxes, net);return 0;}PE 7-‐9/* Programming Exercise 7-9 */#include <stdio.h>#include <stdbool.h> intmain(void){int limit;int num; intdiv;bool numIsPrime; // use int if stdbool.h not availableprintf("Enter a positive integer: "); while(scanf("%d", &limit) == 1 && limit > 0){if (limit > 1)printf("Here are the prime numbers up through %d\n", limit);elseprintf("No primes.\n");for (num = 2; num <= limit; num++){for (div = 2, numIsPrime = true; (div * div) <= num; div++)if (num % div == 0) numIsPrime = false; if (numIsPrime)printf("%d is prime.\n", num);}printf("Enter a positive integer (q to quit): ");}printf("Done!\n");return 0;}PE 7-‐11/* pe7-11.c *//* Programming Exercise 7-11 */#include <stdio.h>#include <ctype.h> intmain(void){const double price_artichokes = 2.05;const double price_beets = 1.15; constdouble price_carrots = 1.09; const doubleDISCOUNT_RATE = 0.05; const double under5 =6.50; const double under20 = 14.00; constdouble base20 = 14.00; const double extralb= 0.50;char ch;double lb_artichokes = 0;double lb_beets = 0; doublelb_carrots = 0; double lb_temp;double lb_total;doublecost_artichokes; doublecost_beets; doublecost_carrots; doublecost_total; doublefinal_total; double discount;double shipping;printf("Enter a to buy artichokes, b for beets, ");printf("c for carrots, q to quit: "); while ((ch =getchar()) != 'q' && ch != 'Q'){ if (ch == '\n')continue; while (getchar() !='\n') continue; ch =tolower(ch); switch (ch){case 'a' : printf("Enter pounds of artichokes: ");scanf("%lf", &lb_temp); lb_artichokes += lb_temp; break;case 'b' : printf("Enter pounds of beets: ");scanf("%lf", &lb_temp); lb_beets += lb_temp; break;case 'c' : printf("Enter pounds of carrots: "); scanf("%lf", &lb_temp); lb_carrots += lb_temp; break;default : printf("%c is not a valid choice.\n", ch);}printf("Enter a to buy artichokes, b for beets, "); printf("c forcarrots, q to quit: ");}cost_artichokes = price_artichokes * lb_artichokes; cost_beets= price_beets * lb_beets; cost_carrots = price_carrots * lb_carrots;cost_total = cost_artichokes + cost_beets + cost_carrots; lb_total =lb_artichokes + lb_beets + lb_carrots; if (lb_total <= 0)shipping = 0.0; else if (lb_total < 5.0) shipping = under5;else if (lb_total < 20) shipping = under20; elseshipping = base20 + extralb * lb_total; if(cost_total > 100.0)discount = DISCOUNT_RATE * cost_total;else discount = 0.0;final_total = cost_total + shipping - discount; printf("Yourorder:\n");printf("%.2f lbs of artichokes at $%.2f per pound:$ %.2f\n",lb_artichokes, price_artichokes, cost_artichokes); printf("%.2f lbs ofbeets at $%.2f per pound: $%.2f\n", lb_beets, price_beets,cost_beets); printf("%.2f lbs of carrots at $%.2f per pound: $%.2f\n", lb_carrots, price_carrots, cost_carrots); printf("Total cost ofvegetables: $%.2f\n", cost_total); if (cost_total > 100)printf("Volume discount: $%.2f\n", discount);printf("Shipping: $%.2f\n", shipping); printf("Totalcharges: $%.2f\n", final_total); return 0; }Chapter 8 Programming ExercisesPE 8-‐1/* Programming Exercise 8-1 */#include <stdio.h>int main(void) { int ch; intct = 0; while ((ch =getchar()) != EOF) ct++;printf("%d characters read\n", ct);return 0;}PE 8-‐3/* Programming Exercise 8-3 *//* Using ctype.h eliminates need to assume consecutive coding */#include <stdio.h> #include<ctype.h> int main(void){ int ch; unsigned longuct = 0; unsigned long lct= 0; unsigned long oct = 0;while ((ch = getchar()) != EOF)if (isupper(ch)) uct++;else if (islower(ch)) lct++;else oct++;printf("%lu uppercase characters read\n", uct); printf("%lulowercase characters read\n", lct); printf("%lu other charactersread\n", oct);return 0;}/* or you could use if(ch >= 'A' && ch <= 'Z')uct++;else if (ch >= 'a' && ch <= 'z')lct++; else oct++;*/PE 8-‐5/* Programming Exercise 8-5 *//* binaryguess.c -- an improved number-guesser *//* but relies upon truthful, correct responses */#include <stdio.h> #include<ctype.h> int main(void) { int high= 100; int low = 1; int guess =(high + low) / 2; char response;printf("Pick an integer from 1 to 100. I will try to guess ");printf("it.\nRespond with a y if my guess is right, with"); printf("\na h if it ishigh, and with an l if it is low.\n"); printf("Uh...is your number %d?\n", guess);while ((response = getchar()) != 'y') /* get response */{if (response == '\n')continue;if (response != 'h' && response != 'l'){printf("I don't understand that response. Please enter h for\n"); printf("high, l for low, or y for correct.\n"); continue;}if (response == 'h')high = guess - 1; else if(response == 'l') low =guess + 1; guess = (high + low)/ 2;printf("Well, then, is it %d?\n", guess);}printf("I knew I could do it!\n"); return 0;}PE 8-‐7/* Programming Exercise 8-7 */#include <stdio.h>#include <ctype.h>#include <stdio.h>#define BASEPAY1 8.75 // $8.75 per hour#define BASEPAY2 9.33 // $9.33 per hour#define BASEPAY3 10.00 // $10.00 per hour#define BASEPAY4 11.20 // $11.20 per hour#define BASEHRS 40 // hours at basepay#define OVERTIME 1.5 // 1.5 time#define AMT1 300 // 1st rate tier#define AMT2 150 // 2st rate tier#define RATE1 0.15 // rate for 1st tier#define RATE2 0.20 // rate for 2nd tier#define RATE3 0.25 // rate for 3rd tier intgetfirst(void); void menu(void); int main(void){ doublehours; doublegross; double net;double taxes;double pay; charresponse;menu();while ((response = getfirst()) != 'q'){if (response == '\n') /* skip over newlines */continue;response = tolower(response); /* accept A as a, etc. */ switch (response){case 'a': pay = BASEPAY1; break;case 'b': pay = BASEPAY2; break; case 'c':pay = BASEPAY3; break; case 'd': pay = BASEPAY4;break;default : printf("Please enter a, b, c, d, or q.\n"); menu();continue; // go to beginning of loop}printf("Enter the number of hours worked this week: ");scanf("%lf", &hours); if (hours <= BASEHRS) gross =hours * pay; elsegross = BASEHRS * pay + (hours - BASEHRS) * pay * OVERTIME;if (gross <= AMT1) taxes = gross * RATE1; else if (gross <= AMT1+ AMT2)taxes = AMT1 * RATE1 + (gross - AMT1) * RATE2; elsetaxes = AMT1 * RATE1 + AMT2 * RATE2 + (gross - AMT1 - AMT2) * RATE3; net = gross - taxes;printf("gross: $%.2f; taxes: $%.2f; net: $%.2f\n", gross, taxes, net); menu(); }printf("Done.\n");return 0;}void menu(void){printf("********************************************************""*********\n");printf("Enter the letter corresponding to the desired pay rate"" or action:\n");printf("a) $%4.2f/hr b) $%4.2f/hr\n", BASEPAY1,BASEPAY2);printf("c) $%5.2f/hr d) $%5.2f/hr\n", BASEPAY3, BASEPAY4); printf("q) quit\n");printf("********************************************************""*********\n");}int getfirst(void){ int ch;ch = getchar();while (isspace(ch)) ch =getchar(); while(getchar() != '\n')continue; return ch;}Chapter 9 Programming ExercisesPE 9-‐1/* Programming Exercise 9-1 */#include <stdio.h>double min(double, double); intmain(void){double x, y; printf("Enter two numbers(q to quit): "); while (scanf("%lf %lf", &x, &y) ==2){ printf("The smaller number is %f.\n", min(x,y));printf("Next two values (q to quit): ");}printf("Bye!\n");return 0;}double min(double a, double b){return a < b ? a : b;}/* alternative implementation doublemin(double a, double b){ if (a < b)return a; elsereturn b;}*/PE 9-‐3/* Programming Exercise 9-3 */#include <stdio.h>void chLineRow(char ch, int c, int r); intmain(void){ char ch; int col, row;printf("Enter a character (# to quit): "); while( (ch = getchar()) != '#'){ if (ch =='\n') continue;printf("Enter number of columns and number of rows: ");if (scanf("%d %d", &col, &row) != 2) break;chLineRow(ch, col, row);printf("\nEnter next character (# to quit): ");}printf("Bye!\n");return 0;}// start rows and cols at 0 voidchLineRow(char ch, int c, int r){int col, row;for (row = 0; row < r ; row++){for (col = 0; col < c; col++)putchar(ch); putchar('\n');}return;}PE 9-‐5/* Programming Exercise 9-5 */#include <stdio.h>void larger_of(double *p1, double *p2); intmain(void){double x, y; printf("Enter two numbers(q to quit): "); while (scanf("%lf %lf", &x, &y) ==2){larger_of(&x, &y);printf("The modified values are %f and %f.\n", x, y); printf("Next two values (q to quit): ");}printf("Bye!\n");return 0;}void larger_of(double *p1, double *p2){ if (*p1 >*p2) *p2 =*p1; else*p1 = *p2;}// alternatively:/*void larger_of(double *p1, double *p2){*p1= *p2 = *p1 > *p2 ? *p1 : *p2;}*/PE 9-‐8/* Programming Exercise 9-8 */ #include<stdio.h>double power(double a, int b); /* ANSI prototype */ intmain(void) { double x, xpow; int n; printf("Enter a number andthe integer power"); printf(" to which\nthe number will be raised.Enter q"); printf(" to quit.\n"); while (scanf("%lf%d", &x, &n)== 2){ xpow = power(x,n); /* function call */ printf("%.3g to the power %d is %.5g\n", x, n, xpow);printf("Enter next pair of numbers or q to quit.\n");} printf("Hope you enjoyed this power trip -- bye!\n");return 0;} double power(double a, int b) /* function definition */{ double pow =1; int i; if(b == 0){ if (a == 0)printf("0 to the 0 undefined; using 1 as the value\n"); pow = 1.0; } else if (a == 0) pow = 0.0; else if (b > 0)for(i = 1; i <= b; i++) pow *= a; else /* b < 0 */ pow = 1.0 / power(a, - b);return pow; /* return the value of pow */}PE 9-‐10/* Programming Exercise 9-10 */ #include<stdio.h> void to_base_n(int x, int base); intmain(void) { int number; int b; int count;printf("Enter an integer (q to quit):\n"); while(scanf("%d", &number) == 1){ printf("Enter number base (2-10): ");while ((count = scanf("%d", &b))== 1&& (b < 2 || b > 10)){printf("base should be in the range 2-10: ");} if(count != 1)break;printf("Base %d equivalent: ", b);to_base_n(number, b); putchar('\n');printf("Enter an integer (q to quit):\n");}printf("Done.\n");return 0;}void to_base_n(int x, int base) /* recursive function */{ int r; r = x % base; if(x >= base) to_base_n(x / base,base); putchar('0' + r); return;}Chapter 10 Programming ExercisesPE 10-‐1/* Programming Exercise 10-1 */#include <stdio.h>#define MONTHS 12 // number of months in a year#define YRS 5 // number of years of data int main(void){// initializing rainfall data for 2010 - 2014 constfloat rain[YRS][MONTHS] = {{4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.2,0.4,2.4,3.5,6.6},{8.5,8.2,1.2,1.6,2.4,0.0,5.2,0.9,0.3,0.9,1.4,7.3},{9.1,8.5,6.7,4.3,2.1,0.8,0.2,0.2,1.1,2.3,6.1,8.4},{7.2,9.9,8.4,3.3,1.2,0.8,0.4,0.0,0.6,1.7,4.3,6.2},{7.6,5.6,3.8,2.8,3.8,0.2,0.0,0.0,0.0,1.3,2.6,5.2}}; int year,month; float subtot,total;printf(" YEAR RAINFALL (inches)\n");for (year = 0, total = 0; year < YRS; year++){ /* for each year, sum rainfall for each month */for (month = 0, subtot = 0; month < MONTHS; month++) subtot +=*(*(rain + year) + month); printf("%5d %15.1f\n", 2010 + year, subtot);total += subtot; /* total for all years */}printf("\nThe yearly average is %.1f inches.\n\n", total/YRS);printf("MONTHLY AVERAGES:\n\n");printf(" Jan Feb Mar Apr May Jun Jul Aug Sep Oct "); printf(" Nov Dec\n");for (month = 0; month < MONTHS; month++){ /* for each month, sum rainfall over years */ for (year = 0, subtot =0; year < YRS; year++) subtot += *(*(rain + year) + month); printf("%4.1f ", subtot/YRS);}printf("\n");return 0;}PE 10-‐3/* Programming Exercise 10-3 */#include <stdio.h>#define LEN 10int max_arr(const int ar[], int n);void show_arr(const int ar[], int n);int main(void){int orig[LEN] = {1,2,3,4,12,6,7,8,9,10}; intmax;show_arr(orig, LEN); max =max_arr(orig, LEN); printf("%d = largestvalue\n", max);return 0;}int max_arr(const int ar[], int n){ int i; intmax = ar[0];/* don't use 0 as initial max value -- fails if all array values are neg */for (i = 1; i < n; i++)if (max < ar[i]) max= ar[i]; return max;}void show_arr(const int ar[], int n){ int i; for (i =0; i < n; i++) printf("%d", ar[i]); putchar('\n');}PE 10-‐5/* Programming Exercise 10-5 */#include <stdio.h>#define LEN 10double max_diff(const double ar[], int n); voidshow_arr(const double ar[], int n);。
1.#include<iostream>#include<string>usingnamespace std;bool revise(const string & s1, const string & s2);int main(){string words;cout<<"Enter words(quit to quit): ";while (cin>> words && words != "quit"){string rewords (words.rbegin(), words.rend());if (revise(words, rewords))cout<< words <<" can be revised.\n";elsecout<<words <<" cannot be revised.\n";cout<<"Enter words(quit to quit): ";}system("Pause");return 0;}bool revise(const string & s1, const string & s2){if (s1 == s2)returntrue;elsereturnfalse;}2.3.读取文件apiary beetle cereal dangerensign florid garage healthinsult jackal keeper loanermanage nonce onset plaid quiltremote stolid train uesfulvaild whence xenon yearn zippy#include<iostream>#include<string>#include<fstream>#include<cstdlib>#include<cctype>#include<ctime>#include<vector>usingnamespace std;vector<string> wordlist;void Fillword();int main(){srand(time(0));char play;cout<<"Will you play a word game?\n";cin>> play;play = tolower(play);Fillword();while (play == 'y'){string target = wordlist[rand() % wordlist.size()];int length = target.length();string attemp(length, '-');string badchars;int guesses = 6 ;cout<<"Guess my secret word. It has "<< length<<" letters, and you guess\n"<<"one letter at a time. You get "<< guesses <<" wrong guesses.\n";cout<<"Your word: "<<attemp<<endl;while (guesses > 0 &&attemp != target){char letter;cout<<"Guess a letter: ";cin>> letter;if (badchars.find(letter) != string::npos || attemp.find(letter) != string::npos){cout<<"You already guessed that. Try again.\n";continue;}int loc = target.find (letter);if (loc == string::npos){cout<<"Oh, bad guess!\n";--guesses;badchars += letter;}else{cout<<"Good guess!\n";attemp [loc] = letter;loc = target.find(letter, loc + 1);while (loc != string::npos){attemp [loc] = letter;loc = target.find(letter, loc + 1);}}cout<<"Your word: "<<attemp<<endl;if (attemp != target){if (badchars.length() > 0)cout<<"Bad choices: "<<badchars<<endl;cout<< guesses <<" bad guesses left.\n";}}if (guesses > 0)cout<<"That's right.\n";elsecout<<"Sorry, the word is "<< target <<" .\n";cout<<"Will you play another<y/n>";cin>> play;play = tolower(play);}system("Pause");return 0;}void Fillword(){string letter;ifstream fin;fin.open("tobuy.txt");if (fin.is_open() == false){cout<<"Can't open file.Bye\n";exit(EXIT_FAILURE);}while (fin){fin >> letter;wordlist.push_back(letter);}fin.close();}4.#include<iostream>#include<algorithm>#include<list>usingnamespace std;constint Number = 5;int reduce (long ar[], int n);void show(int n){ cout<< n <<" " ;}int main(){long one[Number] = {2, 3, 4, 2, 3};int number = reduce(one, Number);cout<<endl;show(number);cout<<endl;system("Pause");return 0;}int reduce (long ar[], int n){list<long> a;a.insert(a.begin(), ar, ar + n);a.sort();a.unique();a.size();for_each(a.begin(), a.end(), show);return a.size();}5.#include<iostream>#include<algorithm>#include<list>#include<string>usingnamespace std;constint Number = 5;template<class T>void show(T n){ cout<< n <<" " ;}template<class T>int reduce(T ar[], int n);int main(){long one[Number] = {2, 3, 4, 2, 3};int number1 = reduce(one, Number);cout<<endl;show(number1);cout<<endl;string two[Number] = { "hello", "good", "great", "hello" , "great"};int number2 = reduce(two, Number);cout<<endl;show(number2);cout<<endl;system("Pause");return 0;}template<class T>int reduce(T ar[], int n){list<T> a;a.insert(a.begin(), ar, ar + n);a.sort();a.unique();a.size();for_each(a.begin(), a.end(), show<T>);return a.size();}6.#include<iostream>#include<algorithm>#include<queue>#include<string>#include<ctime>usingnamespace std;constint MIN_PER_HR = 60;class Customer{private:long arrive;int processtime;public:Customer() { arrive = processtime = 0; }void set(long when){processtime = rand() % 3 + 1;arrive = when;}long when() const { return arrive;}int ptime() const { return processtime; }};typedef Customer Item;bool newcustomer(double x);int main(){srand(time(0));cout<<"Case Study: Bank of Heather Automatic Teller.\n";cout<<"Enter maximum size of queue:";int qs;cin>>qs;queue<Item> line;cout<<"Enter the number fo simulation hours:";int hours;cin>> hours;long cyclelimit = MIN_PER_HR * hours;cout<<"Enter the average number of customers per hour:";double perhour;cin>>perhour;double min_per_cust;min_per_cust = MIN_PER_HR / perhour;Item temp;long turnaways = 0;long customers = 0;long served = 0;long sum_line = 0;int wait_time = 0;long line_wait = 0;for(int cycle = 0; cycle <cyclelimit; cycle++){if (newcustomer(min_per_cust)){if (line.size() == qs)turnaways ++;else{customers++;temp.set(cycle);line.push(temp);}}if (wait_time<= 0 && !line.empty()){line.pop();wait_time = temp.ptime();line_wait += cycle - temp.when();served++;}if(wait_time> 0)wait_time--;sum_line == line.size();}if (customers > 0){cout<<"customers accepted: "<< customers <<endl;cout<<" customers served: "<< served <<endl;cout<<" turnaways: "<<turnaways<<endl;cout<<"average queue size: " ;cout.precision(2);cout.setf(ios_base::fixed, ios_base::floatfield);cout<< (double)sum_line / cyclelimit<<endl;cout<<" average wait time:"<< (double)line_wait/served <<" minutes.\n"; }elsecout<<"No customers!\n";system("Pause");return 0;bool newcustomer(double x){return (rand() * x / RAND_MAX < 1);}7.#include<iostream>#include<algorithm>#include<vector>#include<string>#include<ctime>usingnamespace std;vector<int> lotto(int n1, int n2);void show(int n) { cout<< n <<" ";}int main(){vector<int> winner;winner = lotto(51, 6);for_each(winner.begin(), winner.end(), show);system("Pause");return 0;}vector<int> lotto(int n1, int n2){vector<int> num1;vector<int> num2;for (int i = 0; i< n1; i++)num1.push_back(i);random_shuffle(num1.begin(), num1.end());for (int i = 0; i< n2; i++)num2.push_back(num1[rand()% n1 + 1]);return num2;}8.#include<iostream>#include<algorithm>#include<set>#include<string>#include<iterator>usingnamespace std;int main(){ostream_iterator<string, char> out(cout, " ");set<string> Mat;set<string> Pat;set<string>MPat;string temp1;cout<<"Please enter Mat's frineds(quit to quit):\n";while (getline(cin, temp1) && temp1 != "quit"){Mat.insert(temp1);cout<<"Please enter Mat's frineds(quit to quit):\n";}cout<<"Mat:\n";copy(Mat.begin(), Mat.end(), out);cout<<endl;cout<<"Please enter Pat's frineds(quit to quit):\n";while (getline(cin, temp1) && temp1 != "quit"){Pat.insert(temp1);cout<<"Please enter Pat's frineds(quit to quit):\n";}cout<<"Pat:\n";copy(Pat.begin(), Pat.end(), out);cout<<endl;cout<<"Combine:\n";set_union(Mat.begin(), Mat.end(),Pat.begin(), Pat.end(), insert_iterator<set<string>>(MPat, MPat.begin()));copy(MPat.begin(), MPat.end(), out);cout<<endl;system("Pause");return 0;}9.#include<iostream>#include<algorithm>#include<list>#include<ctime>#include<iterator>#include<vector>usingnamespace std;constint LIM = 10;void outin(int n) { cout<< n <<" "; }int main(){int num[LIM];vector<int> vi0(num, num + LIM);vector<int> vi(num, num + LIM);list<int> li(num, num + LIM);for (int i = 0; i< LIM; i++)num[i] = rand();for_each(vi0.begin(), vi0.end(),outin);cout<<endl;for_each(vi.begin(), vi.end(),outin);cout<<endl;for_each(li.begin(), li.end(),outin);cout<<endl;clock_t start1 = clock();sort(vi.begin(), vi.end());for_each(vi.begin(), vi.end(),outin);cout<<endl;clock_t end1 = clock();cout<< (double) (end1 - start1)/CLOCKS_PER_SEC;cout<<endl;clock_t start2 = clock();li.sort();for_each(li.begin(), li.end(),outin);cout<<endl;clock_t end2 = clock();cout<< (double) (end2 - start2)/CLOCKS_PER_SEC;cout<<endl;sort(vi0.begin(), vi0.end());copy(vi0.begin(), vi0.end(),li.begin());for_each(vi0.begin(), vi0.end(),outin);cout<<endl;clock_t start3 = clock();copy(li.begin(), li.end(),vi.begin());sort(vi.begin(), vi.end());copy(vi.begin(), vi.end(),li.begin());clock_t end3 = clock();cout<< (double) (end3 - start3)/CLOCKS_PER_SEC;cout<<endl;system("Pause");return 0;}10.#include<iostream>#include<algorithm>#include<list>#include<memory>#include<iterator>#include<vector>#include<string>usingnamespace std;constint LIM = 10;void outin(int n) { cout<< n <<" "; }struct Review{string title;int rating;double price;};booloperator< ( shared_ptr<Review>& r1, shared_ptr<Review>& r2);bool ratingworseThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2); bool ratingbetterThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2); bool priceworseThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2); bool pricebetterThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2); bool FillReview(Review & r);void Show(const shared_ptr<Review>& r);int main(){vector<shared_ptr<Review>> books;Review temp;while(FillReview(temp)){shared_ptr<Review>te(new Review);te->title = temp.title;te->rating = temp.rating;te->price = temp.price;books.push_back(te);}if (books.size() > 0){cout<<"Thank you. You entered the following "<<books.size() <<endl;cout<<"Book\tRating\tPrice\n";for_each(books.begin(), books.end(), Show);char ch;cout<<"Plaese enter o, z, rb, rw, pb, pw,q\n";while(tolower(ch)!= 'q'){switch(ch){case'o':cout<<"Original: \n";cout<<"Book\tRating\tPrice\n";for_each(books.begin(), books.end(), Show);break;case'z':cout<<"Sorting by letter.\n";cout<<"Book\tRating\tPrice\n";sort(books.begin(), books.end());for_each(books.begin(), books.end(), Show);break;case'rb':cout<<"Sorting by rating better.\n";cout<<"Book\tRating\tPrice\n";sort(books.begin(), books.end(),ratingbetterThan);for_each(books.begin(), books.end(), Show);break;case'rw':cout<<"Sorting by rating worse.\n";cout<<"Book\tRating\tPrice\n";sort(books.begin(), books.end(),ratingworseThan);for_each(books.begin(), books.end(), Show);break;case'pb':cout<<"Sorting by price better.\n";cout<<"Book\tRating\tPrice\n";sort(books.begin(), books.end(),pricebetterThan);for_each(books.begin(), books.end(), Show);break;case'pw':cout<<"Sorting by price worse.\n";cout<<"Book\tRating\tPrice\n";sort(books.begin(), books.end(),priceworseThan);for_each(books.begin(), books.end(), Show);break;default:break;}cout<<"Plaese enter o, z, rb, rw, pb, pw,q\n";}}system("Pause");return 0;}bool FillReview(Review & r){cout<<"Enter book title (quit to quit):";getline(cin , r.title);if(r.title == "quit")returnfalse;cout<<"Enter book rating:";cin>>r.rating;cout<<"Enter book price:";cin>>r.price;if (!cin)returnfalse;while(cin.get() != '\n')continue;returntrue;}void Show(const shared_ptr<Review>& r){cout<< r->title <<" \t "<< r->rating <<"\t "<< r->price <<" \n";}bool ratingworseThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2) {return (r1->rating < r2->rating);}bool ratingbetterThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2) {return (r1->rating > r2->rating);}bool priceworseThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2) {return (r1->price < r2->price);}bool pricebetterThan( shared_ptr<Review>& r1, shared_ptr<Review>& r2) {return (r1->price > r2->price);}。
第二章:开始学习C++//ex2.1--display your name and a ddress#include<iostream>int main(void){using namespace std;cout<<"My name is liao chunguang and I live in hunan chenzhou.\n〞;}the furlong units to yard uints-把浪单位换位码单位#include<iostream>double fur2yd(double);int main(){using namespace std;cout<<"enter the distance measured by furlong u nits:";double fur;cin>>fur;cout<<"convert the furlong to y ard"<<endl;double yd;yd=fur2yd(fur);cout<<fur<<" furlong is "<<yd<<" yard"<<endl;return 0;}double fur2yd(double t){return 220*t;}每个函数都被调用两次#include<iostream>void mice();void see();using namespace std;int main(){mice();mice();see();see();return 0;}void mice(){cout<<"three blind mice"<<endl;}void see(){cout<<"see how they run"<<endl;}#include<iostream>int main(){using namespace std;cout<<"Enter your age:";int age;cin>>age;int month;month=age*12;cout<<age<<" years is "<<month<<" months"<<endl;return 0;}the Celsius valve to Fahrenheit value#include<iostream>double C2F(double);int main(){using namespace std;cout<<"please enter a Celsius value:";double C;cin>>C;double F;F=C2F(C);cout<<C<<" degrees Celsius is "<<F<<" degrees Fahrenheit."<<endl; return 0;}double C2F(double t){return 1.8*t+32;}the light years valve to astronomical units--把光年转换为天文单位#include<iostream>double convert(double);//函数原型int main(){using namespace std;cout<<"Enter the number of light y ears:";double light_years;cin>>light_years;double astro_units;astro_units=convert(light_years);cout<<light_years<<" light_years = "<<astro_units<<" astronomical units."<<endl; return 0;}double convert(double t){return 63240*t;//1 光年=63240 天文单位}显示用户输入的小时数和分钟数#include<iostream>void show();main(){using namespace std;show();return 0;}void show(){using namespace std;int h,m;cout<<"enter the number of hours:";cin>>h;cout<<"enter the number of minutes:";cin>>m;cout<<"Time:"<<h<<":"<<m<<endl;}第三章:处理数据//ex3.1—将身高用英尺(feet)和英寸(inch)表示#include<iostream>const int inch_per_feet=12;// const 常量--1feet=12inches--1 英尺=12 英寸int main(){using namespace std;cout<<"please enter your height in inches:\b\b\b";// \b 表示为退格字符int ht_inch;cin>>ht_inch;int ht_feet=ht_inch/inch_per_feet;//取商int rm_inch=ht_inch%inch_per_feet;//取余cout<<"your height is "<<ht_feet<<" feet,and "<<rm_inch<<" inches\n";return 0;}计算相应的body mass index〔体重指数〕#include<iostream>const int inch_per_feet=12;const double meter_per_inch=0.0254;const double pound_per_kilogram=2.2;int main(){using namespace std;cout<<"Please enter your height:"<<endl;cout<<"First,enter your height of feet part〔输入你身高的英尺局部〕:_\b";int ht_feet;cin>>ht_feet;cout<<"Second,enter your height of inch p art〔输入你身高的英寸局部〕:_\b";int ht_inch;cin>>ht_inch;cout<<"Now,please enter your weight in pound:\b\b\b";double wt_pound;cin>>wt_pound;int inch;inch=ht_feet*inch_per_feet+ht_inch;double ht_meter;ht_meter=inch*meter_per_inch;double wt_kilogram;wt_kilogram=wt_pound/pound_per_kilogram;cout<<endl;cout<<"Your pensonal body information as follows:"<<endl; cout<<"身高:"<<inch<<"(英尺inch)\n"<<"身高:"<<ht_meter<<"(米meter)\n"<<"体重:"<<wt_kilogram<<"(千克kilogram)\n";double BMI;BMI=wt_kilogram/(ht_meter*ht_meter);cout<<"your Body Mass Index(体重指数) is "<<BMI<<endl;return 0;}以度,分,秒输入,以度输出#include<iostream>const int minutes_per_degree=60;const int seconds_per_minute=60;int main(){using namespace std;cout<<"Enter a latitude in degrees,minutes,and s econds:\n";cout<<"First,enter the d egrees:";int degree;cin>>degree;cout<<"Next,enter the minutes of arc:";int minute;cin>>minute;cout<<"Fianlly,enter the seconds of arc:";int second;cin>>second;double show_in_degree;show_in_degree=(double)degree+(double)minute/minutes_per_degree+(double)second/mi nutes_per_degree/seconds_per_minute;cout<<degree<<" degrees,"<<minute<<" minutes,"<<second<<"seconds ="<<show_in_degree<<" degrees\n";return 0;}#include<iostream>const int hours_per_day=24;const int minutes_per_hour=60;const int seconds_per_minute=60;int main(){using namespace std;cout<<"Enter the number of seconds:";long seconds;cin>>seconds;int Day,Hour,Minute,Second;Day=seconds/seconds_per_minute/minutes_per_hour/hours_per_day;Hour=seconds/seconds_per_minute/minutes_per_hour%hours_per_day;Minute=seconds/seconds_per_minute%minutes_per_hour;Second=seconds%seconds_per_minute;cout<<seconds<<"seconds = "<<Day<<" days,"<<Hour<<" hours,"<<Minute<<" minutes,"<<Second<<" seconds\n";return 0;}#include<iostream>int main(){using namespace std;cout<<"Enter the world population:";long long world_population;cin>>world_population;cout<<"Enter the population of the US:";long long US_population; cin>>US_population;double percentage;percentage=(double)US_population/world_population*100;cout<<"The population of the US is "<<percentage<<"% of the world population.\n"; return 0;}//ex3.6 汽车耗油量-美国(mpg)or 欧洲风格(L/100Km)#include<iostream>int main(){using namespace std;cout<<"Enter the miles of distance you have driven:";double m_distance;cin>>m_distance;cout<<"Enter the gallons of gasoline you have used:";double m_gasoline;cin>>m_gasoline;cout<<"Your car can run "<<m_distance/m_gasoline<<" miles per gallon\n";cout<<"Computing by European style:\n";cout<<"Enter the distance in k ilometers:";double k_distance;cin>>k_distance;cout<<"Enter the petrol in l iters:";double k_gasoline;cin>>k_gasoline;cout<<"In European style:"<<"your can used "<<100*k_gasoline/k_distance<<" liters of petrol per 100 kilometers\n";return 0;}//ex3.7 automobile gasoline consumption-耗油量--欧洲风格(L/100Km)转换成美国风格(mpg) #include<iostream>int main(){using namespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"European style(liters per 100 k ilometers):";double Euro_style;cin>>Euro_style;cout<<"Converts to U.S. style(miles per gallon):"<<endl;cout<<Euro_style<<" L/100Km = "<<62.14*3.875/Euro_style<<" mpg\n";return 0;}// Note that 100 kilometers is 62.14 miles, and 1 gallon is 3.875 liters.//Thus, 19 mpg is about L/100Km, and 27 mpg is about L/100Km. Enter theautomobile gasoline consumption figure inEuropean style(liters per 100 Converts to U.S.style(miles per gallon):mpgPress any key to continue// ex3.7 automobile gasoline consumption-耗油量--美国风格(mpg)转换成欧洲风格(L/100Km) #include<iostream>int main(){using namespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"U.S. style(miles per gallon):";double US_style;cin>>US_style;cout<<"Converts to European style(miles per gallon):"<<endl;cout<<US_style<<" mpg = "<< 62.14*3.875/US_style<<"L/100Km\n";return 0;}// Enter the automobile gasoline consumption figure inU.S. style(miles per gallon):19Converts to European style(miles per gallon):19 mpg =Press any key to continue第四章复合类型//ex4.1 display the information of student#include<iostream>const int Asize=20;using namespace std;struct student//定义结构描述{char firstname[Asize];char lastname[Asize];char grade;int age;};void display(student);//函数原型放在结构描述后int main(){cout<<"what is your first name?"<<endl;student lcg;//创立结构变量〔结构数据对象〕cin.getline(lcg.firstname,Asize);cout<<"what is your last name?"<<endl;cin.getline(stname,Asize);cout<<"what letter grade do you d eserve?"<<endl;cin>>lcg.grade;cout<<"what is your age?"<<endl;cin>>lcg.age;display(lcg);return 0;}void display(student name){cout<<"Name: "<<name.firstname<<","<<stname<<endl;cout<<"Grade:"<<char(name.grade+1)<<endl;cout<<"Age:"<<name.age<<endl;}use the string-class instead of char-array#include<iostream>#include<string>int main(){using namespace std;string name,dessert;cout<<"Enter your name: \n";getline(cin,name);cout<<"Enter your favorite dessert: \n";getline(cin,dessert);cout<<"I have some delicious "<<dessert;cout<<" for you, "<<name<<".\n";return 0;}//有时候会遇到需要按下两次回车键才能正确的显示结果,这是的一个BUG,更改如下:else if (_Tr::eq((_E)_C, _D)){_Chg = true;_I.rdbuf()->sbumpc();//修改后的break; }输入其名和姓,并组合显示#include<iostream>#include<cstring>const int Asize=20;int main(){using namespace std;char fname[Asize];char lname[Asize];char fullname[2*Asize+1];cout<<"Enter your first name:";//输入名字,存储在fname[]数组中cin.getline(fname,Asize);cout<<"Enter your last name:";//输入姓,存储在lname[]数组中cin.getline(lname,Asize);strncpy(fullname,lname,Asize);//把姓lname 复制到fullname 空数组中strcat(fullname,", ");//把“,〞附加到上述fullname 尾部strncat(fullname,fname,Asize);//把fname 名字附加到上述fullname 尾部fullname[2*Asize]='\0';//为防止字符型数组溢出,在数组结尾添加结束符cout<<"Here's the information in a single string:"<<fullname<<endl;//显示组合结果return 0;}#define _CRT_SECURE_NO_WARNINGS#include <iostream>#include <cstring>const int Asize = 20;int main(){using namespace std;char firstname[Asize];char lastname[50];cout << "Enter your first name: ";cin.getline(firstname,Asize);cout << "Enter your last name: ";cin.getline(lastname,50);strcat(lastname,", ");strncat(lastname,firstname,Asize);cout << "Here's the information in a single string: "<< lastname <<endl;return 0;}//ex4.4 使用string 对象存储、显示组合结果#include<iostream>#include<string>int main(){using namespace std;string fname,lname,attach,fullname;cout<<"Enter your first name:";getline(cin,fname);//note:将一行输入读取到string 类对象中使用的是getline(cin,str)//它没有使用句点表示法,所以不是类方法cout<<"Enter your last name:";getline(cin,lname);attach=", ";fullname=lname+attach+fname;cout<<"Here's the information in a single string:"<<fullname<<endl;return 0;}//ex4.5 declare a struct and initialize it 声明结果并创立一个变量#include<iostream>const int Asize=20;struct CandyBar{char brand[Asize];double weight;int calory;int main(){using namespace std;CandyBar snack={"Mocha Munch",2.3,350};cout<<"Here's the information of snack:\n";cout<<"brand:"<<snack.brand<<endl;cout<<"weight:"<<snack.weight<<endl;cout<<"calory:"<<snack.calory<<endl;return 0;}结构数组的声明及初始化#include<iostream>const int Asize=20;struct CandyBar{char brand[Asize];double weight;int calory;};int main(){using namespace std;CandyBar snack[3]={{"Mocha Munch",2.3,350},{"XuFuJi",1.1,300},{"Alps",0.4,100}};for(int i=0;i<3;i++)//利用for 循环来显示snack 变量的内容{cout<<snack[i].brand<<endl<<snack[i].weight<<endl<<snack[i].calory<<endl<<endl;}return 0;}//ex4.7 pizza 披萨饼#include<iostream>#include<string>const int Size=20;struct pizza//声明结构char company[Size];double diameter;double weight;};int main(){using namespace std;pizza pie;//创立一个名为pie 的结构变量cout<<"What's the name of pizza company:";cin.getline(pie pany,Size);cout<<"What's the diameter of pizza:";cin>>pie.diameter;cout<<"What's the weight of pizza:";cin>>pie.weight; cout<<"company:"<<piepany<<endl;cout<<"diameter:"<<pie.diameter<<"inches"<<endl;cout<<"weight:"<<pie.weight<<"ounches"<<endl;return 0;}pizza pie 披萨饼使用new 创立动态结构#include<iostream>#include<string>const int Size=20;struct pizza//声明结构{char company[Size];double diameter;double weight;};int main(){using namespace std;pizza *pie=new pizza;//使用new 创立动态结构cout<<"What's the diameter of pizza:";cin>>pie->diameter; cin.get();//读取下一个字符cout<<"What's the name of pizza company:";cin.get(pie->company,Size);cout<<"What's the weight of pizza:";cin>>pie->weight;cout<<"diameter:"<<pie->diameter<<" inches"<<endl;cout<<"company:"<<pie->company<<endl;cout<<"weight:"<<pie->weight<<" ounches"<<endl;delete pie;//delete 释放内存return 0;}//ex.4.9 使用new 动态分配数组—方法1#include<iostream>#include<string>using namespace std;struct CandyBar{string brand;double weight;int calory;};int main(){CandyBar *snack= new CandyBar[3]; snack[0].brand="A";//单个初始化由new 动态分配的内存snack[0].weight=1.1;snack[0].calory=200;snack[1].brand="B";snack[1].weight=2.2;snack[1].calory=400;snack[2].brand="C";snack[2].weight=4.4;snack[2].calory=500;for(int i=0;i<3;i++){cout << " brand: " << snack[i].brand << endl;cout << " weight: " << snack[i].weight << e ndl;cout << " calorie: " << snack[i].calory << endl<<endl;}delete [] snack;return 0;}//ex.4.10 数组—方法1#include <iostream>int main(){using namespace std;const int Size = 3;int success[Size];cout<<"Enter your success of the three times 40 meters running:\n";cin >> success[0]>>success[1]>>success[2];cout<<"success1:"<<success[0]<<endl;cout<<"success2:"<<success[1]<<endl;cout<<"success3:"<<success[2]<<endl;double average=(success[0]+success[1]+success[2])/3;cout<<"average:"<<average<<endl;return 0;}//ex.4.10 array—方法2#include <iostream>#include <array>int main(){using namespace std;array<double,4>ad={0};cout<<"Enter your success of the three times 40 meters running:\n";cin >> ad[0]>>ad[1]>>ad[2];cout<<"success1:"<<ad[0]<<endl;cout<<"success2:"<<ad[1]<<endl;cout<<"success3:"<<ad[2]<<endl;ad[3]=(ad[0]+ad[1]+ad[2])/3;cout<<"average:"<<ad[3]<<endl;return 0;}第五章循环和关系表达式#include <iostream>int main(){using namespace std;cout<<"Please enter two integers: ";int num1,num2;cin>>num1>>num2;int sum=0;for(int temp=num1;temp<=num2;++temp)//or temp++sum+=temp;cout<<"The sum from "<<num1<<" to "<<num2<<" is "<<sum<<endl;return 0;}#include <iostream>#include<array>int main(){using namespace std;array<long double,101>ad={0};ad[1]=ad[0]=1L;for(int i=2;i<101;i++)ad[i]=i*ad[i-1];for(int i=0;i<101;i++)cout<<i<<"! = "<<ad[i]<<endl;return 0;}#include <iostream>#include <array>using namespace std;int main(){array<long double, 101> multiply;multiply[0] = multiply[1] = 1LL;for (int i = 2; i <= 100; i++)multiply[i] = multiply[i-1]*i;cout << multiply[100];return 0;}#include <iostream>int main(){using namespace std;cout<<"Please enter an integer: ";int sum=0,num;while((cin>>num)&&num!=0){sum+=num;cout<<"So far, the sum is "<<sum<<endl;cout<<"Please enter an integer: ";}return 0;}#include <iostream>int main(){using namespace std;double sum1,sum2;sum1=sum2=0.0;int year=0;while(sum2<=sum1){++year;sum1+=10;sum2=(100+sum2)*0.05+sum2;}cout<<"经过"<<year<<"年后,Cleo 的投资价值才能超过Daphne 的投资价值。
第二章:开始学习C++//ex2.1--display your name and address#include<iostream>int main(void){using namespace std;cout<<"My name is liao chunguang and I live in hunan chenzhou.\n”;}//ex2.2--convert the furlong units to yard uints-把浪单位换位码单位#include<iostream>double fur2yd(double);int main(){using namespace std;cout<<"enter the distance measured by furlong units:";double fur;cin>>fur;cout<<"convert the furlong to yard"<<endl;double yd;yd=fur2yd(fur);cout<<fur<<" furlong is "<<yd<<" yard"<<endl;return 0;}double fur2yd(double t){return 220*t;}//ex2.3-每个函数都被调用两次#include<iostream>void mice();void see();using namespace std;int main(){mice();mice();see();see();return 0;}void mice(){cout<<"three blind mice"<<endl;}void see(){cout<<"see how they run"<<endl;}//ex2.4#include<iostream>int main(){using namespace std;cout<<"Enter your age:";int age;cin>>age;int month;month=age*12;cout<<age<<" years is "<<month<<" months"<<endl;return 0;}//ex2.5---convert the Celsius valve to Fahrenheit value#include<iostream>double C2F(double);int main(){using namespace std;cout<<"please enter a Celsius value:";double C;cin>>C;double F;F=C2F(C);cout<<C<<" degrees Celsius is "<<F<<" degrees Fahrenheit."<<endl; return 0;}double C2F(double t){return 1.8*t+32;}//ex2.6---convert the light years valve to astronomical units--把光年转换为天文单位#include<iostream>double convert(double);//函数原型int main(){using namespace std;cout<<"Enter the number of light years:";double light_years;cin>>light_years;double astro_units;astro_units=convert(light_years);cout<<light_years<<" light_years = "<<astro_units<<" astronomical units."<<endl; return 0;}double convert(double t){return 63240*t;//1 光年=63240 天文单位}//ex2.7--显示用户输入的小时数和分钟数#include<iostream>void show();main(){using namespace std;show();return 0;}void show(){using namespace std;int h,m;cout<<"enter the number of hours:";cin>>h;cout<<"enter the number of minutes:";cin>>m;cout<<"Time:"<<h<<":"<<m<<endl;}第三章:处理数据//ex3.1—将身高用英尺(feet)和英寸(inch)表示#include<iostream>const int inch_per_feet=12;// const常量--1feet=12inches--1英尺=12英寸int main(){using namespace std;cout<<"please enter your height in inches:___\b\b\b";// \b表示为退格字符int ht_inch;cin>>ht_inch;int ht_feet=ht_inch/inch_per_feet;//取商int rm_inch=ht_inch%inch_per_feet;//取余cout<<"your height is "<<ht_feet<<" feet,and "<<rm_inch<<" inches\n";return 0;}//ex3.2--计算相应的body mass index(体重指数)#include<iostream>const int inch_per_feet=12;const double meter_per_inch=0.0254;const double pound_per_kilogram=2.2;int main(){using namespace std;cout<<"Please enter your height:"<<endl;cout<<"First,enter your height of feet part(输入你身高的英尺部分):_\b";int ht_feet;cin>>ht_feet;cout<<"Second,enter your height of inch part(输入你身高的英寸部分):_\b";int ht_inch;cin>>ht_inch;cout<<"Now,please enter your weight in pound:___\b\b\b";double wt_pound;cin>>wt_pound;int inch;inch=ht_feet*inch_per_feet+ht_inch;double ht_meter;ht_meter=inch*meter_per_inch;double wt_kilogram;wt_kilogram=wt_pound/pound_per_kilogram;cout<<endl;cout<<"Your pensonal body information as follows:"<<endl;cout<<"身高:"<<inch<<"(英尺inch)\n"<<"身高:"<<ht_meter<<"(米meter)\n"<<"体重:"<<wt_kilogram<<"(千克kilogram)\n";double BMI;BMI=wt_kilogram/(ht_meter*ht_meter);cout<<"your Body Mass Index(体重指数) is "<<BMI<<endl;return 0;}//ex3.3 以度,分,秒输入,以度输出#include<iostream>const int minutes_per_degree=60;const int seconds_per_minute=60;int main(){using namespace std;cout<<"Enter a latitude in degrees,minutes,and seconds:\n";cout<<"First,enter the degrees:";int degree;cin>>degree;cout<<"Next,enter the minutes of arc:";int minute;cin>>minute;cout<<"Fianlly,enter the seconds of arc:";int second;cin>>second;double show_in_degree;show_in_degree=(double)degree+(double)minute/minutes_per_degree+(double)second/mi nutes_per_degree/seconds_per_minute;cout<<degree<<" degrees,"<<minute<<" minutes,"<<second<<"seconds ="<<show_in_degree<<" degrees\n";return 0;}//ex3.4#include<iostream>const int hours_per_day=24;const int minutes_per_hour=60;const int seconds_per_minute=60;int main(){using namespace std;cout<<"Enter the number of seconds:";long seconds;cin>>seconds;int Day,Hour,Minute,Second;Day=seconds/seconds_per_minute/minutes_per_hour/hours_per_day;Hour=seconds/seconds_per_minute/minutes_per_hour%hours_per_day;Minute=seconds/seconds_per_minute%minutes_per_hour;Second=seconds%seconds_per_minute;cout<<seconds<<"seconds = "<<Day<<" days,"<<Hour<<" hours,"<<Minute<<" minutes,"<<Second<<" seconds\n";return 0;}//ex3.5#include<iostream>int main(){using namespace std;cout<<"Enter the world population:";long long world_population;cin>>world_population;cout<<"Enter the population of the US:";long long US_population;cin>>US_population;double percentage;percentage=(double)US_population/world_population*100;cout<<"The population of the US is "<<percentage<<"% of the world population.\n";return 0;}//ex3.6 汽车耗油量-美国(mpg)or欧洲风格(L/100Km)#include<iostream>int main(){using namespace std;cout<<"Enter the miles of distance you have driven:";double m_distance;cin>>m_distance;cout<<"Enter the gallons of gasoline you have used:";double m_gasoline;cin>>m_gasoline;cout<<"Your car can run "<<m_distance/m_gasoline<<" miles per gallon\n";cout<<"Computing by European style:\n";cout<<"Enter the distance in kilometers:";double k_distance;cin>>k_distance;cout<<"Enter the petrol in liters:";double k_gasoline;cin>>k_gasoline;cout<<"In European style:"<<"your can used "<<100*k_gasoline/k_distance<<" liters of petrol per 100 kilometers\n";return 0;}//ex3.7 automobile gasoline consumption-耗油量--欧洲风格(L/100Km)转换成美国风格(mpg) #include<iostream>int main(){using namespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"European style(liters per 100 kilometers):";double Euro_style;cin>>Euro_style;cout<<"Converts to U.S. style(miles per gallon):"<<endl;cout<<Euro_style<<" L/100Km = "<<62.14*3.875/Euro_style<<" mpg\n";return 0;}// Note that 100 kilometers is 62.14 miles, and 1 gallon is 3.875 liters.//Thus, 19 mpg is about 12.4 L/100Km, and 27 mpg is about 8.7 L/100Km.Enter the automobile gasoline consumption figure inEuropean style(liters per 100 kilometers):12.4Converts to U.S. style(miles per gallon):12.4 L/100Km = 19.4187 mpgPress any key to continue// ex3.7 automobile gasoline consumption-耗油量--美国风格(mpg)转换成欧洲风格(L/100Km) #include<iostream>int main(){using namespace std;cout<<"Enter the automobile gasoline consumption figure in\n"<<"U.S. style(miles per gallon):";double US_style;cin>>US_style;cout<<"Converts to European style(miles per gallon):"<<endl;cout<<US_style<<" mpg = "<< 62.14*3.875/US_style<<"L/100Km\n";return 0;}// Enter the automobile gasoline consumption figure inU.S. style(miles per gallon):19Converts to European style(miles per gallon):19 mpg = 12.6733L/100KmPress any key to continue第四章复合类型//ex4.1 display the information of student#include<iostream>const int Asize=20;using namespace std;struct student//定义结构描述{char firstname[Asize];char lastname[Asize];char grade;int age;};void display(student);//函数原型放在结构描述后int main(){cout<<"what is your first name?"<<endl;student lcg;//创建结构变量(结构数据对象)cin.getline(lcg.firstname,Asize);cout<<"what is your last name?"<<endl;cin.getline(stname,Asize);cout<<"what letter grade do you deserve?"<<endl;cin>>lcg.grade;cout<<"what is your age?"<<endl;cin>>lcg.age;display(lcg);return 0;}void display(student name){cout<<"Name: "<<name.firstname<<","<<stname<<endl;cout<<"Grade:"<<char(name.grade+1)<<endl;cout<<"Age:"<<name.age<<endl;}//ex4.2 use the string-class instead of char-array#include<iostream>#include<string>int main(){using namespace std;string name,dessert;cout<<"Enter your name: \n";getline(cin,name);cout<<"Enter your favorite dessert: \n";getline(cin,dessert);cout<<"I have some delicious "<<dessert;cout<<" for you, "<<name<<".\n";return 0;}//有时候会遇到需要按下两次回车键才能正确的显示结果,这是vc++6.0的一个BUG,更改如下:else if (_Tr::eq((_E)_C, _D)){_Chg = true;_I.rdbuf()->sbumpc();//修改后的break; }ex4.3 输入其名和姓,并组合显示#include<iostream>#include<cstring>const int Asize=20;int main(){using namespace std;char fname[Asize];char lname[Asize];char fullname[2*Asize+1];cout<<"Enter your first name:";//输入名字,存储在fname[]数组中cin.getline(fname,Asize);cout<<"Enter your last name:";//输入姓,存储在lname[]数组中cin.getline(lname,Asize);strncpy(fullname,lname,Asize);//把姓lname复制到fullname空数组中strcat(fullname,", ");//把“,”附加到上述fullname尾部strncat(fullname,fname,Asize);//把fname名字附加到上述fullname尾部fullname[2*Asize]='\0';//为防止字符型数组溢出,在数组结尾添加结束符cout<<"Here's the information in a single string:"<<fullname<<endl;//显示组合结果return 0;}//ex4.4 使用string对象存储、显示组合结果#include<iostream>#include<string>int main(){using namespace std;string fname,lname,attach,fullname;cout<<"Enter your first name:";getline(cin,fname);//note:将一行输入读取到string类对象中使用的是getline(cin,str)//它没有使用句点表示法,所以不是类方法cout<<"Enter your last name:";getline(cin,lname);attach=", ";fullname=lname+attach+fname;cout<<"Here's the information in a single string:"<<fullname<<endl;return 0;}//ex4.5 declare a struct and initialize it 声明结果并创建一个变量#include<iostream>const int Asize=20;struct CandyBar{char brand[Asize];double weight;int calory;};int main(){using namespace std;CandyBar snack={"Mocha Munch",2.3,350};cout<<"Here's the information of snack:\n";cout<<"brand:"<<snack.brand<<endl;cout<<"weight:"<<snack.weight<<endl;cout<<"calory:"<<snack.calory<<endl;return 0;}//ex4.6 结构数组的声明及初始化#include<iostream>const int Asize=20;struct CandyBar{char brand[Asize];double weight;int calory;};int main(){using namespace std;CandyBar snack[3]={{"Mocha Munch",2.3,350},{"XuFuJi",1.1,300},{"Alps",0.4,100}};for(int i=0;i<3;i++)//利用for循环来显示snack变量的内容{cout<<snack[i].brand<<endl<<snack[i].weight<<endl<<snack[i].calory<<endl<<endl;}return 0;}//ex4.7 pizza披萨饼#include<iostream>#include<string>const int Size=20;struct pizza//声明结构{char company[Size];double diameter;double weight;};int main(){using namespace std;pizza pie;//创建一个名为pie的结构变量cout<<"What's the name of pizza company:";cin.getline(pany,Size);cout<<"What's the diameter of pizza:";cin>>pie.diameter;cout<<"What's the weight of pizza:";cin>>pie.weight;cout<<"company:"<<pany<<endl;cout<<"diameter:"<<pie.diameter<<"inches"<<endl;cout<<"weight:"<<pie.weight<<"ounches"<<endl;return 0;}//ex4.8 pizza pie 披萨饼使用new创建动态结构#include<iostream>#include<string>const int Size=20;struct pizza//声明结构{char company[Size];double diameter;double weight;};int main(){using namespace std;pizza *pie=new pizza;//使用new创建动态结构cout<<"What's the diameter of pizza:";cin>>pie->diameter;cin.get();//读取下一个字符cout<<"What's the name of pizza company:";cin.get(pie->company,Size);cout<<"What's the weight of pizza:";cin>>pie->weight;cout<<"diameter:"<<pie->diameter<<" inches"<<endl;cout<<"company:"<<pie->company<<endl;cout<<"weight:"<<pie->weight<<" ounches"<<endl;delete pie;//delete释放内存return 0;}//ex.4.9 使用new动态分配数组—方法1#include<iostream>#include<string>using namespace std;struct CandyBar{string brand;double weight;int calory;};int main(){CandyBar *snack= new CandyBar[3];snack[0].brand="A";//单个初始化由new动态分配的内存snack[0].weight=1.1;snack[0].calory=200;snack[1].brand="B";snack[1].weight=2.2;snack[1].calory=400;snack[2].brand="C";snack[2].weight=4.4;snack[2].calory=500;for(int i=0;i<3;i++){cout << " brand: " << snack[i].brand << endl;cout << " weight: " << snack[i].weight << endl;cout << " calorie: " << snack[i].calory << endl<<endl;}delete [] snack;return 0;}//ex.4.10 数组—方法1#include <iostream>int main(){using namespace std;const int Size = 3;int success[Size];cout<<"Enter your success of the three times 40 meters running:\n";cin >> success[0]>>success[1]>>success[2];cout<<"success1:"<<success[0]<<endl;cout<<"success2:"<<success[1]<<endl;cout<<"success3:"<<success[2]<<endl;double average=(success[0]+success[1]+success[2])/3;cout<<"average:"<<average<<endl;return 0;}//ex.4.10 array—方法2#include <iostream>#include <array>int main(){using namespace std;array<double,4>ad={0};cout<<"Enter your success of the three times 40 meters running:\n";cin >> ad[0]>>ad[1]>>ad[2];cout<<"success1:"<<ad[0]<<endl;cout<<"success2:"<<ad[1]<<endl;cout<<"success3:"<<ad[2]<<endl;ad[3]=(ad[0]+ad[1]+ad[2])/3;cout<<"average:"<<ad[3]<<endl;return 0;}第五章循环和关系表达式//ex.5.1#include <iostream>int main(){using namespace std;cout<<"Please enter two integers: ";int num1,num2;cin>>num1>>num2;int sum=0;for(int temp=num1;temp<=num2;++temp)//or temp++sum+=temp;cout<<"The sum from "<<num1<<" to "<<num2<<" is "<<sum<<endl; return 0;}//ex.5.2#include <iostream>#include<array>int main(){using namespace std;array<long double,101>ad={0};ad[1]=ad[0]=1L;for(int i=2;i<101;i++)ad[i]=i*ad[i-1];for(int i=0;i<101;i++)cout<<i<<"! = "<<ad[i]<<endl;return 0;}//ex.5.3#include <iostream>int main(){using namespace std;cout<<"Please enter an integer: ";int sum=0,num;while((cin>>num)&&num!=0){sum+=num;cout<<"So far, the sum is "<<sum<<endl;cout<<"Please enter an integer: ";}return 0;}//ex.5.4#include <iostream>int main(){using namespace std;double sum1,sum2;sum1=sum2=0.0;int year=0;while(sum2<=sum1){++year;sum1+=10;sum2=(100+sum2)*0.05+sum2;}cout<<"经过"<<year<<"年后,Cleo的投资价值才能超过Daphne的投资价值。
Chapter 2 Programming ExercisesPE 2--‐1/*ProgrammingExercise2-1*/#include<stdio.h>intmain(void){printf("GustavMahler\n");printf("Gustav\nMahler\n");printf("Gustav");printf("Mahler\n");return0;}PE 2--‐3/*ProgrammingExercise2-3*/#include<stdio.h>intmain(void)PE 2--‐8/*ProgrammingExercise2-8*/#include<stdio.h>voidone_three(void);voidtwo(void);intmain(void){printf("startingnow:\n");one_three();printf("done!\n");return0;}voidone_three(void){printf("one\n");two();printf("three\n");}voidtwo(void){printf("two\n");}Chapter 3 Programming ExercisesPE 3--‐2/*ProgrammingExercise3-2*/#include<stdio.h>intmain(void){intascii;printf("EnteranASCIIcode:");scanf("%d",&ascii);printf("%distheASCIIcodefor%c.\n",ascii,ascii);return0;}"%s,%s\n",lname,fname);return0;}PE 4--‐4/*ProgrammingExercise4-4*/#include<stdio.h>intmain(void){floatheight;charname[40];printf("Enteryourheightininches:");scanf("%f",&height);printf("Enteryourname:");scanf("%s",name);printf("%s,youare%.3ffeettall\n",name,height/12.0);return0;}PE 4--‐7/*ProgrammingExercise4-7*/#include<stdio.h>#include<float.h>intmain(void){floatot_f=1.0/3.0;doubleot_d=1.0/3.0;printf("floatvalues:");printf("%.4f%.12f%.16f\n",ot_f,ot_f,ot_f);printf("doublevalues:"); printf("%.4f%.12f%.16f\n",ot_d,ot_d,ot_d);printf("FLT_DIG:%d\n ",FLT_DIG);printf("DBL_DIG:%d\n",DBL_DIG);return0;}Chapter 5 Programming ExercisesPE 5--‐1/*ProgrammingExercise5-1*/#include<stdio.h>intmain(void){constintminperhour=60;intminutes,hours,intmain(void)/*findssumoffirstnintegers*/{intcount,sum;intn;printf("Entertheupperlimit:");scanf("%d",&n);count=0;sum=0;while(count++<n)sum=sum+count;printf("sum=%d\n",sum);return0;}PE 5--‐7/*ProgrammingExercise5-7*/#include<stdio.h>voidshowCube(doublex);intmain(void)/*findscubeofenterednumber*/ {doubleval;printf("Enterafloating-pointvalue:");scanf("%lf",&val);showCube(val);return0;}voidshowCube(doublex){printf("Thecubeof%eis%e.\n",x,x*x*x);}Chapter 6 Programming ExercisesPE 6--‐1/*pe6-1.c*//*thisimplementationassumesthecharactercodes*//*aresequential,astheyareinASCII.*/#include<stdio.h>#defineSIZE26intmain(void){charlcase[SIZE];inti;for(i=0;i<SIZE;i++)lPE 6--‐8/*pe6-8.c*/#include<stdio.h>intmain(void){doublen,m;doubleres;printf("Enterapairofnumbers:");while(scanf("%lf%lf",&n,&m)==2){res=(n-m)/(n*m);printf("(%.3g-%.3g)/(%.3g*%.3g)=%.5g\n",n,m,n,m,res);printf("Enternextpair(non-numerictoquit):");}return0;}PE 6--‐11/*pe6-11.c*/#include<stdio.h>#defineSIZE8intmain(void){intvals[SIZE];inti;printf("Pleaseenter%dintegers.\n",SIZE);for(i=0;i<SIZE;i++)scanf("%d",&vals[i]);printf("Here,inreverseorder,arethevaluesyouentered:\n");for(i=SIZE-1;i>=0;i--)printf("%d",vals[i]);printf("\n");return0;}PE 6--‐13/*pe6-13.c*/}for(i=0;i<SIZE;i++)printf("%8g",arr[i]);printf("\n");for(i=0;i<SIZE;i++)printf("%8g",arr_cumul[i]);printf("\n");return0;}PE 6--‐16/*pe6-16.c*/#include<stdio.h>#defineRATE_SIMP0.10#defineRATE_COMP0.05#defineINIT_AMT100.0intmain(void){doubledaphne=INIT_AMT;doubledeidre=INIT_AMT;intyears=0;while(deidre<=daphne){daphne+=RATE_SIMP*INIT_AMT;deidre+=RATE_COMP*deidre;++years;}printf("Investmentvaluesafter%dyears:\n",years);printf("Daphne:$%.2f\n", daphne);printf("Deidre:$%.2f\n",deidre);return0;}Chapter 7 Programming ExercisesPE 7--‐1/*ProgrammingExercise7-1*/#include<stdio.h>intmain(void){charch;intsp_ct=0;intnl_ct=0;intother=0;while((ch=getchar())printf("Numberofodds:%d",ct_odd);if(ct_odd>0)printf("average:%g",sumodd/ct_odd);putchar('\n');printf("\ndone\n");return0;}PE 7--‐5/*ProgrammingExercise7-5*/#include<stdio.h>intmain(void){charch;intct1=0;intct2=0;while((ch=getchar())!='#'){switch(ch){case'.':putchar('!');++ct1;break;case'!':putchar('!');putchar('!');++ct2;break;default:putchar(ch);}}printf("%dreplacement(s)of.with!\n",ct1);printf("%dreplacement(s)of!with!!\n",ct2);return0;}PE 7--‐7//ProgrammingExercise7-7#include<stdio.h>#defineBASEPAY10//$10perhour#defineBASEHRS40//hoursatbasepay#defineOVERTIME1.5//1.5time{if(limit>1)printf("Herearetheprimenumbersupthrough%d\n",limit);elseprintf("Noprimes.\n");for(num=2;num<=limit;num++){for(div=2,numIsPrime=true;(div*div)<=num;div++)if(num%div==0)numIsPrime=false;if(numIsPrime)printf("%disprime.\n",num);}printf("Enterapositiveinteger(qtoquit):");}printf("Done!\n");return0;}PE 7--‐11/*pe7-11.c*//*ProgrammingExercise7-11*/#include<stdio.h>#include<ctype.h>intmain(void){constdoubleprice_artichokes=2.05;constdoubleprice_beets=1.15;constdoubleprice_carrots=1.09;constdoubleDISCOUNT_RATE=0.05;constdoubleunder5=6.50;constdoubleunder20=14.00;constdoublebase20=14.00;constdoubleextralb=0.50;charch;doublelb_artichokes=0;doublelb_beets=}final_total=cost_total+shipping-discount;printf("Yourorder:\n");printf("%.2flbsofartichokesat$%.2fperpound:$%.2f\n",lb_artichokes,price_artic hokes,cost_artichokes);printf("%.2flbsofbeetsat$%.2fperpound:$%.2f\n",lb_bee ts,price_beets,cost_beets);printf("%.2flbsofcarrotsat$%.2fperpound:$%.2f\n",lb _carrots,price_carrots,cost_carrots);printf("Totalcostofvegetables:$%.2f\n",cost_total);if(cost_total>100)printf("V olumediscount:$%.2f\n",discount);printf("Shipping:$%.2f\n",shipping);printf("Totalcharges:$%.2f\n",final_total);return0;}Chapter 8 Programming ExercisesPE 8--‐1/*ProgrammingExercise8-1*/#include<stdio.h>intmain(void){intch;intct=0;while((ch=getchar())!=EOF)ct++;printf("%dcharactersread\n",ct);return0;}PE 8--‐3/*ProgrammingExercise8-3*//*Usingctype.heliminatesneedtoassumeconsecutivecoding*/ #include<stdio.h>#include<ctype.h>intmain(void){intch;unsignedlonguct=0;unsignedlonglct=0;unsignedlongoct=0;while((ch=getchar())!=EOF)if(isupper(ch))uct++;elseif(islower(ch))lct++;elseoct++;}1;elseif(response=='l')low=guess+1;guess=(high+low)/2;printf("Well,then,isit%d?\n",guess);}printf("IknewIcoulddoit!\n");return0;}PE 8--‐7/*ProgrammingExercise8-7*/#include<stdio.h>#include<ctype.h>#include<stdio.h>#defineBASEPAY18.75//$8.75perhour#defineBASEPAY29.33//$9.33perhour#defineBASEPAY310.00//$10.00perhour#defineBASEPAY411.20//$11.20perhour#defineBASEHRS40//hoursatbasepay#defineOVERTIME1.5//1.5time#defineAMT1300//1stratetier#defineAMT2150//2stratetier#defineRATE10.15//ratefor1sttier#defineRATE20.20//ratefor2ndtier#defineRATE30.25//ratefor3rdtierintgetfirst(void);voidmenu(void);intmain(void){doublehours;doublegross;doublenet;doubletaxes;doublepay;charresponse;menu();printf("a)$%4.2f/hrb)$%4.2f/hr\n",BASEPAY1,BASEPAY2);printf("c)$%5.2f/hrd)$%5.2f/hr\n",BASEPAY3,BASEPAY4);printf("q)quit\n");printf("********************************************************""*********\n");}intgetfirst(void){intch;ch=getchar();while(isspace(ch))ch=getchar();while(getchar()!='\n')continue;returnch;}Chapter 9 Programming ExercisesPE 9--‐1/*ProgrammingExercise9-1*/#include<stdio.h>doublemin(double,double);intmain(void){doublex,y;printf("Entertwonumbers(qtoquit):");while(scanf("%lf%lf",&x,&y)==2){printf("Thesmallernumberis%f.\n",min(x,y));printf("Nexttwovalues(qtoquit):");}printf("Bye!\n");return0;}doublemin(doublea,doubleb){for(col=0;col<c;col++)putchar(ch);putchar('\n');}return;}PE 9--‐5/*ProgrammingExercise9-5*/#include<stdio.h>voidlarger_of(double*p1,double*p2);intmain(void){doublex,y;printf("Entertwonumbers(qtoquit):");while(scanf("%lf%lf",&x,&y)==2){larger_of(&x,&y);}printf("Bye!\n");return0;}voidlarger_of(double*p1,double*p2){if(*p1>*p2)*p2=*p1;else*p1=*p2;}//alternatively:/*voidlarger_of(double*p1,double*p2){*p1=*p2=*p1>*p2?*p1:*p2;*/printf("baseshouldbeintherange2-10:");}if(count!=1)break;printf("Base%dequivalent:",b);to_base_n(number,b);putchar('\n');printf("Enteraninteger(qtoquit):\n");}printf("Done.\n");return0;}voidto_base_n(intx,intbase)/*recursivefunction*/ {intr;r=x%base;if(x>=base)to_base_n(x/base,base);putchar('0'+r);return;}Chapter 10 Programming Exercises/*ProgrammingExercise10-1*/#include<stdio.h>#defineMONTHS12//numberofmonthsinayear#defineYRS5//numberofyearsofdataintmain(void){//initializingrainfalldatafor2010-2014constfloatrain[YRS][MONTHS]={{4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.2,0.4,2.4,3.5,6.6},{8.5,8.2,1.2,1.6,2.4,0.0,5.2,0.9,0.3,0.9,1.4,7.3},{9.1,8.5,6.7,4.3,2.1,0.8,0.2,0.2,1.1,2.3,6.1,8.4},{7.2,9.9,8.4,3.3,1.2,0.8,0.4,0.0,0.6,1.7,4.3,6.2},{7.6,5.6,3.8,2.8,3.8,0.2,0.0,0.0,0.0,1.3,2.6,5.2}};intyear,month;floatsubtot,total;RS;year++)}intmax_arr(constintar[],intn){inti;intmax=ar[0];/*don'tuse0asinitialmaxvalue--failsifallarrayvaluesareneg*/ for(i=1;i<n;i++)if(max<ar[i])max=ar[i];returnmax;}voidshow_arr(constintar[],intn){inti;for(i=0;i<n;i++)printf("%d",ar[i]);putchar('\n');}PE 10--‐5/*ProgrammingExercise10-5*/#defineLEN10doublemax_diff(constdoublear[],intn);voidshow_arr(constdoublear[],intn);intmain(void){doubleorig[LEN]={1.1,2,3,4,12,61.3,7,8,9,10};doublemax; show_arr(orig,LEN);max=max_diff(orig,LEN);printf("%g=maximumdifference\n",max);return0;}doublemax_diff(constdoublear[],intn) {inti;doublemax=ar[0];doublemin=ar}}{inti;for(i=0;i<n;i++)printf("%d",ar[i]);putchar('\n');}PE 10--‐11/*ProgrammingExercise10-11*/#include<stdio.h>#defineROWS3#defineCOLS5voidtimes2(intar[][COLS],intr);voidshowarr2(intar[][COLS],intr);intmain(void){intstuff[ROWS][COLS]={{1,2,3,4,5},{6,7,8,-2,10},{11,12,13,14,15}};showarr2(stuff,ROWS);putchar('\n');times2(stuff,ROWS);showarr2(stuff,ROWS);return0;}voidtimes2(intar[][COLS],intr){introw,col;for(row=0;row<r;row++)for(col=0;col<COLS;col++)ar[row][col]*=2;}voidshowarr2(intar[][COLS],intr){introw,col;for(i=0;i<n;i++){printf("Entervalue#%d:",i+1);scanf("%lf",&ar[i]);}}doubleaverage2d(introws,intcols,doublear[rows][cols]){intr,c;doublesum=0.0;for(r=0;r<rows;r++)for(c=0;c<cols;c++)sum+=ar[r][c];if(rows*cols>0)returnsum/(rows*cols);elsereturn0.0;}doublemax2d(introws,intcols,doublear[rows][cols]){intr,c;doublemax=ar[0][0];for(r=0;r<rows;r++)for(c=0;c<cols;c++)if(max<ar[r][c])max=ar[r][c];returnmax;}voidshowarr2(introws,intcols,doublear[rows][cols]){introw,col;for(row=0;row<rows;row++){for(col=0;col<cols;col++)printf("%g",ar[row][col]);putchar('\n');}}doubleaverage(constdoublear[],intn) {inti;doublesum=0.0;}char*getword(char*str){intch;char*orig=str;//skipoverinitialwhitespacewhile((ch=getchar ())!=EOF&&isspace(ch))continue;if(ch==EOF)returnNULL;else*str++=ch;//firstcharacterinword//getrestofwordwhile((ch=getchar())!=EOF&&!isspace(ch))*str++=ch;*str='\0';if(ch==EOF)returnNULL;else{while(ch!='\n')ch=getchar();returnorig;}}PE 11--‐6#include<stdio.h>#include<string.h>#defineLEN80_Boolis_within(constchar*str,charc);char*s_gets(char*st,intn);intmain(void){charinput[LEN];charch;intfound;;printf("Enterastring:");while(s_gets(input,LEN)&&input[0]!='\0'){printf("Enteracharacter:");ch=getchar();while(getchar()!='\n')continue;found=is_within(input,ch);if(found==0)printf("%cnotfoundinstring.\n",ch);elseputs("Notfound");return0;}#include<string.h>char*string_in(constchar*s1,constchar*s2){intl2=strlen(s2);inttries;/*maximumnumberofcomparisons*/intnomatch=1;/*setto0ifmatchisfound*/ tries=strlen(s1)+1-l2;if(tries>0)while((nomatch=strncmp(s1,s2,l2))&&tries--)s1++;if(nomatch)returnNULL;elsereturn(char*)s1;/*castconstaway*/PE 11--‐10/*ProgrammingExercise11-10*/#include<stdio.h>#include<string.h>//forstrchr();#defineLEN81intdrop_space(char*s);char*s_gets(char*st,intn);intmain(void){charorig[LEN];puts("Enterastringof80charactersorless:");while(s_gets(orig,LEN)&&orig[0]!='\0'){drop_space(orig);puts(orig);puts("Enternextstring(orjustEntertoquit):");}}#include<stdbool.h>//forbool,true,falseintmain(void){charc;//readincharacterintlow_ct=0;//numberoflowercasecharactersintup_ct=0;//numberofuppercasecharactersintdig_ct=0;//numberofdigitsintn_words=0;//numberofwordsintpunc_ct=0;//numberofpunctuationmarksboolinword=false;//==trueifcisinaword printf("Entertexttobeanalyzed(EOFtoterminate):\n");while((c=getchar())!=EOF) {if(islower(c))low_ct++;elseif(isupper(c))up_ct++;elseif(isdigit(c))dig_ct++;elseif(ispunct(c))punc_ct++;if(!isspace(c)&&!inword){inword=true;//startinganewwordn_words++;//countwordif(isspace(c)&&inword)inword=false;//reachedendofword}printf("\nwords=%d,lowercase=%d,uppercase=%d," "digits=%d,punctuation=%d\n",n_words,low_ct,up_ct,dig_ct,punc_ct);return0;}PE 11--‐14/*ProgrammingExercise11-14*/#include<stdio.h>#include<stdlib.h>/*foratof()*/#include<math.h>/*forpow()*/intmain(intargc,char*argv[])}}if(ok)while((ch=getchar())!=EOF){switch(mode){case'p':putchar(ch);break;case'u':putchar(toupper(ch));break;case'l':putchar(tolower(ch));}}return0;Chapter 12 Programming ExercisesPE 12--‐1/*pe12-1.c--deglobalizingglobal.c*//*ProgrammingExercise12-1*//*oneofseveralapproaches*/#include<stdio.h>voidcritic(int*u);intmain(void){intunits;/*unitsnowlocal*/printf("Howmanypoundstoafirkinofbutter?\n");scanf("%d",&units);while(units!=56)critic(&units);printf("Youmusthavelookeditup!\n");return0;}{if(*pm!=METRIC&&*pm!=US){printf("Invalidmodespecified.Mode%d\n",*pm);printf("Previousmodewil lbeused.\n");*pm=USE_RECENT;}}voidget_info(intmode,double*pd,double*pf){if(mode==METRIC)printf("Enterdistancetraveledinkilometers:");elseprintf("Enterdistancetraveledinmiles:");scanf("%lf",pd);if(mode==Mprintf("Enterfuelconsumedinliters:");elseprintf("Enterfuelconsumedingallons:");scanf("%lf",pf);}voidshow_info(intmode,doubledistance,doublefuel){printf("Fuelconsumptionis");if(mode==METRIC)printf("%.2flitersper100km.\n",100*fuel/distance);elseprintf("%.1fmilespergallon.\n",distance/fuel);}//pe12-3b.c//compilewithpe12-3a.c#include<stdio.h>#include"pe12-3a.h"intmain(void)for(search=top+1;search<limit;search++)if(array[search]>array[top]){temp=array[search];array[search]=array[top];array[top]=temp;}}/*print.c--printsanarray*/voidprint(constintarray[],intlimit){intindex;for(index=0;index<limit;index++){printf("%2d",array[index]);if(index%10==9)putchar('\n');}if(index%10!=0)//iflastlinenotcompleteputchar('\n');}PE 12--‐7/*pe12-7.c*/#include<stdio.h>#include<stdlib.h>/*forsrand()*/#include<time.h>/*fortime()*/introllem(int);intmain(void){intdice,count,roll;intsides;intset,sets;srand((unsignedint)time(0));/*randomizerand()*/ printf("Enterthenumberofsets;enterqtostop:");while(scanf("%d",&sets)==1)}printf("Usage:%ssourcefiletargetfile\n",argv[0]);exit(EXIT_FAILURE);}if((source=fopen(argv[1],"rb"))==NULL){printf("Couldnotopenfile%sforinput\n",argv[1]);exit(EXIT_FAILURE);}if((target=fopen(argv[2],"wb"))==NULL){printf("Couldnotopenfile%sforoutput\n",argv[2]);exit(EXIT_FAILURE);}while((byte=getc(source))!=EOF){putc(byte,target);}if(fclose(source)!=0)printf("Couldnotclosefile%s\n",argv[1]);if(fclose(target)!=0)printf("Couldnotclosefile%s\n",argv[2]);return0;}PE 13--‐4/*ProgrammingExercise13-4*/#include<stdio.h>#include<stdlib.h>intmain(intargc,char*argv[]){intbyte;FILE*source;intfilect;}FILE*fa,*fs;intfiles=0;intfct;if(argc<3){printf("Usage:%sappendfilesourcefile[s]\n",argv[0]);exit(EXIT_FAILURE);}if((fa=fopen(argv[1],"a"))==NULL){fprintf(stderr,"Can'topen%s\n",argv[1]);exit(EXIT_FAILURE);}if(setvbuf(fa,NULL,_IOFBF,BUFSIZE)!=0){fputs("Can'tcreateoutputbuffer\n",stderr);exit(EXIT_FAILURE);}for(fct=2;fct<argc;fct++){if(strcmp(argv[fct],argv[1])==0)fputs("Can'tappendfiletoitself\n",stderr);els eif((fs=fopen(argv[fct],"r"))==NULL)fprintf(stderr,"Can'topen%s\n",argv[fct]);else{if(setvbuf(fs,NULL,_IOFBF,BUFSIZE)!=0){fputs("Can'tcreateoutputbuffer\n",stderr);continue;}append(fs,fa);if(ferror(fs)!=0)fprintf(stderr,"Errorinreadingfile%s.\n",argv[fct]);if(ferror(fa)!=0)fprintf(stderr,"Errorinwritingfile%s.\n",argv[1]);fclose(fs);files++;printf("File%sappended.\n",argv[fct]);}}printf("Done.%dfilesappended.\n",files);fclose(fa);return0;}{while(ch1!=EOF&&ch1!='\n')/*skippedafterEOFreached*/ {putchar(ch1);ch1=getc(f1);}if(ch1!=EOF){putchar('\n');ch1=getc(f1);}while(ch2!=EOF&&ch2!='\n')/*skippedafterEOFreached*/ {putchar(ch2);ch2=getc(f2);}if(ch2!=EOF){putchar('\n');ch2=getc(f2);}}if(fclose(f1)!=0)printf("Couldnotclosefile%s\n",argv[1]);if(fclose(f2)!=0)printf("Couldnotclosefile%s\n",argv[2]);return0;}/*ProgrammingExercise13-7b*//*codeassumesthatend-of-lineimmediatelyprecedesend-of-file*/#include<stdio.h>#include<stdlib.h>intmain(intargc,char*argv[]){intch1,ch2;FILE*f1;}putchar('\n');ch2=getc(f2);}}if(fclose(f1)!=0)printf("Couldnotclosefile%s\n",argv[1]);if(fclose(f2)!=0)printf("Couldnotclosefile%s\n",argv[2]);return0;}PE 13--‐9/*ProgrammingExercise13-9*//*tosimplifyaccounting,storesonenumberandwordperline*/#include<stdio.h>#include<stdlib.h>#defineMAX47intmain(void){FILE*fp;charwords[MAX];intwordct=0;if((fp=fopen("wordy","a+"))==NULL){fprintf(stderr,"Can'topen\"words\"file.\n");exit(EXIT_FAILURE);}//determinecurrentnumberoflinesrewind(fp);while(fgets(words,MAX,fp)!=NULL)wordct++;rewind(fp);puts("Enterwordstoaddtothe file;pressthe#");puts("keyatthebeginningofalinetoterminate.");while((fscanf(stdin,"%40s ",words)==1)&&(words[0]!='#'))fprintf(fp,"%3d:%s\n",++wordct,words);puts("Filecontents:");}return0;}PE 13--‐12: Sample Input Text009000000000589985200000000000000090000000589985520000000000000000000000581985452000000000000090000000589985045200000000009000000000589985004520000000000000000000589185000452000000000000000000589985000045200000555555555555589985555555555555888888888888589985888888888888999909999999999999999939999999888888888888589985888888888888555555555555589985555555555555000000000000589985000000000000000000000000589985000066000000000022000000589985005600650000000033000000589985056111165000000044000000589985005600650000000055000000589985000066000000000000000000589985000000000000000000000000589985000000000000PE 13--‐12/*ProgrammingExercise13-12*/#include<stdio.h>}voidinit(chararr[][COLS],charch){intr,c;for(r=0;r<ROWS;r++)for(c=0;c<COLS;c++)arr[r][c]=ch;}voidMakePic(intdata[][COLS],charpic[][COLS],introws) {introw,col;for(row=0;row<rows;row++)for(col=0;col<COLS;col++)pic[row][col]=trans[data[row][col]];}Chapter 14 Programming ExercisesPE 14--‐1/*pe14-1.c*/#include<stdio.h>#include<string.h>#include<ctype.h>structmonth{charname[10];charabbrev[4];intdays;intmonumb;};conststructmonthmonths[12]={{"January","Jan",31,1},{"February","Feb",28,2},{"March","Mar",31,3},{"April","Apr",30,4},{"May","May",31,5},{"June","Jun",30,6},{"July","Jul",31,7},{"August","Aug",31,8},}char*s_gets(char*st,intn);#defineMAXTITL40#defineMAXAUTL40#defineMAXBKS100/*maximumnumberofbooks*/structbook{/*setupbooktem plate*/chartitle[MAXTITL];charauthor[MAXAUTL];floatvalue;};voidsortt(structbook*pb[],intn);voidsortv(structbook*pb[],intn);intmain(void){structbooklibrary[MAXBKS];/*arrayofbookstructures*/structbook*pbk[MAXB KS];/*pointersforsorting*/intcount=0;intindex;printf("Pleaseenterthebooktitle.\n");printf("Press[enter]atthestartofalinetostop.\n");while(count<MAXBKS&&s_gets(library[count].title,MAXTITL)!=NULL&&library[count].title[0]!='\0'){printf("Nowentertheauthor.\n");s_gets(library[count].author,MAXAUTL);printf("Nowenterthevalue.\n");scanf("%f",&library[count].value);pbk[count]=&library[count];count++;while(getchar()!='\n')continue;/*clearinputline*/if(count<MAXBKS)printf("Enterthenexttitle.\n");}printf("Hereisthelistofyourbooks:\n");for(index=0;index<count;index++)printf("%sby%s:$%.2f\n",library[index].title,library[index].author,library[index].value);}}}char*s_gets(char*st,intn){char*ret_val;char*find;ret_val=fgets(st,n,stdin);if(ret_val){find=strchr(st,'\n');//lookfornewlineif(find)//iftheaddressisnotNULL,*find='\0';//placeanullcharacterthereelsewhile(getchar()!='\n')continue;//disposeofrestofline}returnret_val;}PE 14--‐5/*pe14-5.c*/#include<stdio.h>#include<string.h>#defineLEN14#defineCSIZE4#defineSCORES3structname{charfirst[LEN];charlast[LEN];};structstudent{structnameperson;floatscores[SCORES];floatmean;};voidget_scores(structstudentar[],intlim);voidfind_means(structstude ntar[],intlim);voidshow_class(conststructstudentar[],intlim);voidsho w_ave(conststructstudentar[],intlim);intmain(void) {structstudentclass[CSIZE]={{"Flip","Snide"},}}voidshow_class(conststructstudentar[],intlim) {inti,j;charwholename[2*LEN];for(i=0;i<lim;i++){strcpy(wholename,ar[i].person.first);strcat(wholename,"");strcat( wholename,ar[i]st);printf("%27s:",wholename);for(j=0;j<SCORES;j++)printf("%6.1f",ar[i].scores[j]);printf("Average=%5.2f\n",ar[i].mean);}}voidshow_ave(conststructstudentar[],intlim) {inti,j;floattotal;printf("\n%27s:","QUIZA VERAGES");for(j=0;j<SCORES;j++){for(total=0,i=0;i<lim;i++)total+=ar[i].scores[j];printf("%6.2f",total/lim);}for(total=0,i=0;i<lim;i++)total+=ar[i].mean;printf("All=%5.2f\n",total/lim);}PE 14--‐7/*pe14-7.c*/#include<stdio.h>#include<stdlib.h>#include<string.h>{if(count==0)puts("Currentcontentsofbook.dat:");printf("%sby%s:$%.2f\n",library[count].book.title,librar y[count].book.author,library[count].book.value);printf("Doyouwishtochangeordeletethisentry?<y/n>");if(getlet("yn")=='y'){printf("Enterctochange,dtodeleteentry:");if(getlet("cd")=='d'){library[count].delete_me=true;deleted++;puts("Entrymarkedfordeletion.");}elseupdate(&library[count]);}count++;}fclose(pbooks);}filecount=count-deleted;if(count==MAXBKS){fputs("Thebook.datfileisfull.",stderr);exit(EXIT_FAILURE);}puts("Pleaseaddnewbooktitles.");puts("Press[enter]atthestartofalinetostop.");open=0;while(filecount<MAXBKS){if(filecount<count){while(library[open].delete_me==false)open++;}}{intstatus=CONTINUE;if(s_gets(pb->book.title,MAXTITL)==NULL||pb->book.title[0]=='\0')status=DONE;else{printf("Nowentertheauthor:");s_gets(pb->book.author,MAXAUTL);printf("Nowenterthevalue:");while(scanf("%f",&pb->book.value)!=1){puts("Pleaseusenumericinput");scanf("%*s");}while(getchar()!='\n')continue;/*clearinputline*/pb->delete_me=false;}returnstatus;}voidupdate(structpack*item){structbookcopy;charc;copy=item->book;puts("Entertheletterthatindicatesyourchoice:");puts("t)modifytitlea)modifya uthor");puts("v)modifyvalues)quit,savingchanges");puts("q)quit,ignorechanges");while((c=getlet("tavsq"))!='s'&&c!='q'){switch(c){case't':puts("Enternewtitle:");s_gets(copy.title,MAXTITL);break; case'a':puts("Enternewauthor:");s_gets(copy.author,MAXAUTL);break;case'v:puts("Enternewvalue:");while(scanf("%f",©.value)!=1)#defineEMPTY0#defineTAKEN1#defineCONTINUE1#defineDONE0 structplanestats{intseat_id;intstatus;charlast[LEN];charfirst[LEN];};intgetmenu(void);intgetlet(constchar*);intopenings(conststructplanestats[],int);voidshow_empties(conststructpl anestats[],int);voidlist_assign(structplanestats*[],int);voidassign_seat(str uctplanestats[],int);voiddelete_seat(structplanestats[],int);voidshow_seats(conststructplanestats[],int);voidsort(structplanestats*[],int);voidmakeli st(conststructplanestats[],char*,int);char*s_gets(char*st,intn);。
第二章:开始学习C++ n”;}<<endl; return 0;}double C2F(double t){return *t+32;}<<endl; return 0;}double convert(double t){return 63240*t;n"; return 0;}style(miles per gallon):"<<endl;cout<<Euro_style<<" L/100Km = "<<*Euro_style<<" mpg\n"; return 0;}Enter the automobile gasoline consumption figure inEuropean style(liters per 100kilometers): Converts to .style(miles per gallon):L/100Km = mpgPress any key to continuestyle(miles pergallon):"; doubleUS_style;cin>>US_style;cout<<"Converts to European style(miles per gallon):"<<endl; cout<<US_style<<" mpg = "<< *US_style<<"L/100Km\n"; return 0;}style(miles per gallon):19Converts to European style(miles per gallon): 19 mpg = 100KmPress any key to continue第四章复合类型n";return 0;}rand<<endl<<snack[i].weight<<endl<<snack[i].calory<<endl<<endl;}return 0;}rand="A";eight=;snack[0].calory=200;snack[1].brand="B";snack[1].weight=;snack[1].calory=400;snack[2].brand="C";snack[2].weight=;snack[2].calory=500;for(int i=0;i<3;i++){cout << " brand: " <<snack[i].brand << endl; cout<< " weight: " <<snack[i].weight << endl;cout << " calorie: " << snack[i].calory << endl<<endl;}delete []snack;return 0;}et(); car*ps=newcar[num];for(int i=0;i<num;++i){cout<<"Car #"<<i+1<<":\n";cout<<"Please enter themake: ";getline(cin,ps[i].name);cout<<"Please enter theyear made: ";(cin>>ps[i].year).get();}cout<<"Here is yourcollection:\n"; for(int i=0;i<num;++i)cout<<ps[i].year<<""<<ps[i].name<<endl; delete [] ps;return 0;}#include <iostream>#include<string> usingnamespace std;struct car{string maker;int year;};int main(){int number;cout << "How many cars do you wish to catalog "; cin >> number;car* a = new car[number];for (int i = 0; i < number; i++){cout << "Car #" << i+1 << ": " <<endl; cout << "Please enter themaker: "; ();getline(cin,a[i].maker);cout << "Please enter the yearmade: "; cin >> a[i].year;}cout << "Here is your collection: "<< endl; for (int i = 0; i < number;i++)cout << a[i].year << " " << a[i].maker <<endl; delete [] a;return 0;}#include<iostream> usingnamespace std;struct car{charmaker[20];int year;};int main(){int number;cout << "How many cars do you wish to catalog "; cin >> number;car* a = new car[number];for (int i = 0; i < number; i++){cout << "Car #" << i+1 << ": " <<endl; cout << "Please enter themaker: "; ();(a[i].maker, 20);cout << "Please enter the yearmade: "; cin >> a[i].year;}cout << "Here is your collection: "<< endl; for (int i = 0; i < number;i++)cout << a[i].year << " " << a[i].maker <<endl; delete [] a;return 0;}n"; return 0;}n";return 0;}和的区别是:word != "done",因为当 word = done 一样时,返回值为1,不一样时才是返回0.;for(intk=0;k<=i;++k)cout<<"*";cout<<endl;}return 0;}第六章分支语句和逻辑运算符n"; break;case 'p':cout<<"A maple is apianist.\n"; break;case 't':cout<<"A maple is atree.\n"; break;case 'g':cout<<"A maple is a game.\n";}return0;}#include<iostream> usingnamespace std;void show();int main(){show();char choice;while (cin >> choice){switch(choice){case 'c' : cout << "It's acarnivore.\n"; break;case 'p' : cout << "It's apianist.\n"; break;case 't' : cout << "A maple is atree.\n"; break;case 'g' : cout << "It's agame.\n"; break;default : cout << "Please enter a c, p, t, org:";}}return 0;}void show(){cout << "Please enter one of the followingchoices: \n" "c) carnivore p)pianist\n""t) tree g) game\n";}display by name b. display by title\n"<<"c. display by bopname d. diplay bypreference\n"<<"q.quit\n";char ch;bop member[5]={{"Wimp Macho","EnglishTeacher","DEMON",0},{"Raki Rhodes","JuniorProgrammer","BOOM",1},{"Celia Laiter","Super Star","MIPS",2},{"Hoppy Hipman","AnalystTrainee","WATEE",1},{"Pat Hand","Police","LOOPY",2}};cout<<"Enter your choice:";while(cin>>ch&&ch!='q'){switch(ch){case 'a':for(int i=0;i<5;i++)cout<<member[i].fullname<<endl; break;case 'b':for(int i=0;i<5;i++)cout<<member[i].title<<endl; break;case 'c':for(int i=0;i<5;i++)cout<<member[i].bopname<<endl; break;case 'd':for(int i=0;i<5;i++){if(member[i].preference==0)cout<<member[i].fullname<<endl; elseif(member[i].preference==1)cout<<member[i].title<<endl; elseif(member[i].preference==2)cout<<member[i].bopname<<endl;}break;}cout<<"Next choice: ";}cout<<"Bye!\n";return 0;}#include <iostream> using namespace std; const int strsize = 30; struct bop{charfullname[strsize];chartitle[strsize];charbopname[strsize];int preference;};void show();int main(){bop A[5] ={{"Wimp Macho", "Teacher", "HAHA", 0},{"Raki Rhodes", "Junior Programmer", "LIAR",1},{"Celia", "engineer", "MIPS", 2},{"Hoppy Hipman", "Analyst Trainee", "WAHU", 1},{"Pat Hand", "Student", "LOOPY", 2}};cout << "Benevolent Order of ProgrammersReport\n"; show();cout << "Enter yourchoice: "; char choice;cin >> choice;while (choice != 'q'){switch(choice){case 'a' : cout << A[0].fullname << endl << A[1].fullname << endl<< A[2].fullname << endl << A[3].fullname<< endl<< A[4].fullname <<endl; break;case 'b' : cout << A[0].title << endl << A[1].title<< endl<< A[2].title << endl << A[3].title<< endl<< A[4].title <<endl; break;case 'c' : cout << A[0].bopname << endl << A[1].bopname << endl<< A[2].bopname << endl << A[3].bopname<< endl<< A[4].bopname <<endl; break;case 'd' : cout << A[0].fullname << endl << A[1].title << endl<< A[2].bopname << endl << A[3].title <<endl<< A[4].bopname <<endl; break;default : cout << "That's not the properchoice.\n";}cout << "Next choice:"; cin >> choice;}cout <<"Bye!\n";return 0;}void show(){cout << "a. display by name b. display by title\n"<< "c. display by bopname d. display bypreference\n"<< "q. quit\n";}ame); cout<<"请输入第"<<i+1<<"位捐款人捐款的数目:";cin>>ps[i].money;();}cout<<"GrandPatrons:\n"; for(inti=0;i<num;++i)if(ps[i].money>10000){cout<<ps[i].name<<"\n"<<ps[i].money<<endl;++temp;}if(temp==0)cout<<"none\n";cout<<"Patrons:\n"; for(inti=0;i<num;++i)if(ps[i].money<=10000){cout<<ps[i].name<<"\n"<<ps[i].money<<endl;++temp;}if(temp==0)cout<<"none\n";delete []ps; return0;}#include <iostream>#include<string> usingnamespace std;struct charity{string name;double money;};int main(){int number;int count =0;cout << "Please enter the number ofdonator: "; cin >> number;charity *pt = newcharity[number]; for (int i= 0; i < number; i++){cout << "Please enter yourname: "; ();getline(cin, pt[i].name);cout << "Please enter the money you are going todonate: "; cin >> pt[i].money;if(pt[i].money >10000) count++;}if(count == 0)cout << "None(money >10000)"; else{cout << "Grand Patron\n";for(int i = 0; i < number;i++){if(pt[i].money > 10000)cout << pt[i].name << " " << pt[i].money<< endl;}}cout << endl;if(10 - count == 0)cout << "None(money <10000)"; else{cout << "Patron\n";for(int i = 0; i < number; i++){if(pt[i].money < 10000)cout << pt[i].name << " " << pt[i].money<< endl;}}return 0;}n"; exit(EXIT_FAILURE);}inFile>>ch;while()){++sum;inFile>>ch;}if())cout<<"End of filereached.\n"; else if())cout<<"Input terminated by datamismatch.\n"; elsecout<<"Input terminated for unkonwn reason.\n";cout<<"总共有"<<sum<<"个字符在这个文件中。
C Primer Plus第六版中文版习题答案Github: /zhayujie/C-Primer-Plus第一章1.#include <stdio.h>int main(void) {double inch, cm;printf("Please input the inches: ");scanf("%lf", &inch);cm = inch * 2.54;printf("%g cm\n", cm);return 0;}第二章3.#include<stdio.h>int main(void){int days,years=21;days=years*365;printf("我的年龄是%d岁,%d天\n",years,days);return 0;}4.#include<stdio.h>void jolly(void);void deny(void);int main(void){jolly();jolly();deny();return 0;}void jolly(void){printf("For he's a jolly good fellow!\n"); }void deny(void){printf("Which nobody can deny!\n");}5.#include<stdio.h>void br(void);void ic(void);int main(void){br();printf(",");ic();printf("\n");ic();printf("\n");br();printf("\n");return 0;}void br(void){printf("Brazil,Russia");}void ic(void){printf("India,China");}6.#include<stdio.h>int main(void){int toes=10;int toes_2,toes2;toes_2=2*toes;toes2=toes*toes;printf("toes是%d,toes的两倍是%d,toes的平方是%d\n",toes,toes_2,toes2); return 0;}8.#include<stdio.h>void one_three(void);void two(void);int main(void){printf("starting now\n");one_three();}void one_three(void){printf("one\n");two();printf("three\n");printf("done!\n");}void two(void){printf("two\n");}第三章2.#include<stdio.h>int main(void){char ch;printf("please input a number:");scanf("%d",&ch);printf("%c\n",ch);return 0;}4.#include<stdio.h>int main(void){float a;printf("Enter a floating-point value: ");scanf("%f",&a);printf("fixed-point notation: %f\n",a);printf("exponential notation: %e\n",a);return 0;}5.#include<stdio.h>int main(void){int age;double seconds;printf("please input your age: ");scanf("%d",&age);seconds=age*3.156e7;printf("the corresponding seconds are: %e\n",seconds);return 0;}7.#include<stdio.h>int main(void){float inches,cms;printf("input your height(inch): ");scanf("%f",&inches);cms=inches*2.54;printf("your height(cm): %f\n",cms);return 0;}8.#include<stdio.h>int main(void){float pint,ounce,soupspoon,teaspoon,cup;printf("input the number of cups: ");scanf("%f",&cup);pint=cup/2;ounce=cup*8;soupspoon=ounce*2;teaspoon=soupspoon*3;printf("they are equivalent of:\n%f pint\n%f ounce\n%f soupspoons\n%f teaspoons\n",pint,ounce,soupspoon,teaspoon);return 0;}第四章1.#include<stdio.h>int main(void){char firstname[40],lastname[40];printf("Input your firstname: ");scanf("%s",firstname);printf("Input your lastname: ");scanf("%s",lastname);printf("Your name is %s,%s\n",firstname,lastname);return 0;}2.#include<stdio.h>#include<string.h>int main(void){char name[40];int width;printf("Input your name: ");scanf("%s",name);width=strlen(name)+3;printf("%*s\n",width,name); //输入的名和姓中间不能分隔return 0;}4.#include<stdio.h>int main(void){float height;char name[40];printf("Input your height(cm) and name: ");scanf("%f%s",&height,name);height=height/100;printf("%s, you are %.3fm tall\n",name,height);return 0;}5.#include<stdio.h>int main(void){float speed,size,time;printf("Input the download speed(Mb/s) and the file size(MB):\n"); scanf("%f%f",&speed,&size);time=size/speed*8.0;printf("At %.2f megabits per second, a file of %.2f megabytes\n",speed,size);printf("downloads in %.2f seconds.\n",time);return 0;}6.#include<stdio.h>#include<string.h>int main(void){char firstname[40],lastname[40];printf("Input your firstname: ");scanf("%s",firstname);printf("Input your lastname: ");scanf("%s",lastname);printf("%s %s\n",firstname,lastname);printf("%*d %*d\n",strlen(firstname),strlen(firstname),strlen(lastname),strlen(lastname)); printf("%s %s\n",firstname,lastname);printf("%*d %*d\n",-strlen(firstname),strlen(firstname),-strlen(lastname),strlen(lastname) );return 0;}7.#include<stdio.h>#include<float.h>int main(void){double a=1.0/3.0;float b=1.0/3.0;printf("%.6f %.6f\n",a,b); //左侧double型右侧float型printf("%.12f, %.12f\n",a,b);printf("%.16f, %.16f\n",a,b);printf("DBL_DIG: %d\n",DBL_DIG);printf("FLT_DIG: %d\n",FLT_DIG);return 0;}8.#include<stdio.h>#define GALLON 3.758 //1 gallon=3.785 liters#define MILE 1.609 //1 mile=1.609 kilometersint main(void){float gallon,mile;printf("Input miles and gallons: ");scanf("%f%f",&mile,&gallon);printf("Miles per gallon: %.1f\n",mile/gallon);printf("Litre per 100 kilometers: %.1f\n",gallon*GALLON/(mile*MILE)*100);return 0;}第五章1.#include<stdio.h>#define H_P_M 60 //1h=60minint main(void){int hour,min,left;printf("Enter the number of minutes: ");scanf("%d",&min);while(min>0){hour=min/H_P_M;left=min%H_P_M;printf("%d minutes is %d hours and %d minutes.\n",min,hour,left); printf("Enter your next value: ");scanf("%d",&min);}printf("Good bye!\n");return 0;}2.#include<stdio.h>int main(void){int num,count;printf("Input a integer: ");scanf("%d",&num);count=0;while(count++<11){printf("%d ",num);num++;}printf("\n");return 0;}3.#include<stdio.h>#define DAYS_PER_WEEK 7 //一周7天int main(void){int day,week,left;printf("Input the number of days: ");scanf("%d",&day);while(day>0){week=day/DAYS_PER_WEEK;left=day%DAYS_PER_WEEK;printf("%d days are %d weeks, %d days.\n",day,week,left); printf("Next input: ");scanf("%d",&day);}return 0;}4.#include<stdio.h>#define CM_PER_FEET 30.48 //1feet=30.48cm#define CM_PER_INCH 2.54 //1inch=2.54cmint main(void){int feet;float cm,inch;printf("Enter a height in centimeters: ");scanf("%f",&cm);while(cm>0){feet=(int)(cm/CM_PER_FEET);inch=(cm-feet*CM_PER_FEET)/CM_PER_INCH;printf("%.1f cm = %d feet, %.1f inches\n",cm,feet,inch); printf("Enter a height in centimeters (<=0 to quit): "); scanf("%f",&cm);}printf("bye\n");return 0;}5.#include<stdio.h>int main(void){int count,sum,days;printf("Input the number of days: ");scanf("%d",&days);count=sum=0;while(count++<days)sum=sum+count;printf("The money you earned: %d\n",sum);return 0;}6.#include<stdio.h>int main(void){int count,sum,days;printf("Input the number of days: ");scanf("%d",&days);count=sum=0;while(count++<days)sum=sum+count*count;printf("The money you earned: %d\n",sum);return 0;}7.#include<stdio.h>void cube(double n);int main(void){double num;printf("Input a number: ");scanf("%lf",&num);cube(num);}void cube(double n){printf("The cube of %f is %f\n",n,n*n*n);}8.#include<stdio.h>int main(void){int num1,num2;printf("This program computes moduli.\n");printf("Enter an integer to serve as the second operand: ");scanf("%d",&num1);printf("Now enter the first operand: ");scanf("%d",&num2);while(num2>0){printf("%d %% %d is %d\n",num2,num1,num2%num1);printf("Enter next number for first operand (<= 0 to quit): "); scanf("%d",&num2);}printf("Done\n");}9.#include<stdio.h>void Temperatures(double fah);int main(void){double fah,cel,kel;//华氏温度,摄氏温度,开氏温度printf("Input the Fahrenheit temperature: ");while(scanf("%lf",&fah)==1){Temperatures(fah);printf("Next input: ");}printf("Done.\n");}void Temperatures(double fah){const double a=5.0,b=9.0,c=32.0,d=276.13; printf("%.2f ℉ is %.2f ℃, %.2f K.\n",fah,a/b*(fah-c),a/b*(fah-c)+d);}第六章1.#include<stdio.h>#define SIZE 26int main(void){char ch[SIZE];int index;for(index=0;index<SIZE;index++){ch[index]='a'+index;printf("%c ",ch[index]);}printf("\n");return 0;}2.#include<stdio.h>int main(void){int i,j;for(i=1;i<=5;i++){for(j=1;j<=i;j++)printf("$");printf("\n");}return 0;}3.#include<stdio.h>int main(void){int i,j;for(i=1;i<=6;i++){for(j=0;j<i;j++)printf("%c",'F'-j); printf("\n");}return 0;}4.#include<stdio.h>#define ROWS 6int main(void){char ch;int i,j;for(ch='A',i=0;i<ROWS;i++) {for(j=0;j<=i;j++)printf("%c",ch++); printf("\n");}return 0;}5.#include<stdio.h>#define ROWS 5int main(void){char ch='A';int i,j;for(i=1;i<=ROWS;i++){for(j=1;j<=ROWS-i;j++)printf(" ");for(j=0;j<i;j++)printf("%c",ch+j);for(j=i-2;j>=0;j--)printf("%c",ch+j);printf("\n");}return 0;}6.#include<stdio.h>int main(void){int max,min,num;printf("Input the min and max: ");scanf("%d%d",&min,&max);printf("%10s%10s%10s\n","number","square","cube");for(num=min;num<=max;num++)printf("%10d%10d%10d\n",num,num*num,num*num*num); return 0;}7.//与题目不同打印的是句子#include<stdio.h>#include<string.h>#define SIZE 40int main(void){int i,index=-1;char ch[SIZE];printf("Input a word: ");do{ index++;scanf("%c",&ch[index]);}while(ch[index]!='\n');for(i=index+1;i<=40;i++)ch[i]='\0';for(index=strlen(ch);index>=0;index--)printf("%c",ch[index]);printf("\n");return 0;}8.#include<stdio.h>int main(void){double n1,n2;printf("Input two numbers: ");while(2==scanf("%lf%lf",&n1,&n2)){printf("%f\n",(n1-n2)/n1*n2);printf("Input your next pair of numbers: ");}printf("Bye!\n");return 0;}9.#include<stdio.h>double calculate(double n1, double n2);int main(void){double num1, num2;printf("Input two numbers: ");while (2 == scanf("%lf%lf", &num1, &num2)) //输入两个浮点数 {printf("%f\n", calculate(num1, num2)); //函数调用printf("Input your next pair of numbers: ");}printf("Bye!\n");return 0;}double calculate(double n1, double n2){return ((n1 - n2) / (n1 * n2)); //返回运算结果}10.#include <stdio.h>int main(void){int lower, upper;int num, sum;printf("Enter lower and upper integer limits: ");scanf("%d%d", &lower, &upper);while (lower < upper){for (sum=0, num=lower; num <= upper; num++)sum = sum + num * num; //计算平方和printf("The sums of the squares from %d to %d is %d\n", lower * lower, upper * upper, sum); //输出结果printf("Enter next set of limits: ");scanf("%d%d", &lower, &upper); //下一次输入}printf("Done\n");return 0;}11.#include <stdio.h>#define SIZE 8int main(void){int num[SIZE];int index;printf("Enter 8 integers: ");for (index=0; index<SIZE; index++) //输入8个整数scanf("%d", &num[index]);for (index=SIZE-1; index >= 0; index--) //倒序输出printf("%d ", num[index]);printf("\n");return 0;}12.#include <stdio.h>int main(void){double sum1=0, sum2=0;int count, items, sign;printf("Enter the items: ");scanf("%d", &items); //输入序列的项数for (count=1, sign=1; count <= items; count++, sign *= -1){sum1 += 1.0 / count;sum2 += 1.0 * sign / count;} //分别计算两序列的和 printf("1.0 + 1.0/2.0 + 1.0/3.0 + 1.0/4.0 + ... = %f\n", sum1); printf("1.0 - 1.0/2.0 + 1.0/3.0 - 1.0/4.0 + ... = %f\n", sum2);return 0;}13.#include <stdio.h>#define SIZE 8int main(void){int index, count, num[SIZE];for (index = 0, count = 1; index < SIZE; index++){count *= 2;num[index] = count;} //for循环将数组元素设为2的前8次幂 index=0; //初始化index的值doprintf("%d ", num[index++]);while (index < SIZE); //do while循环显示数组元素的值printf("\n");return 0;}14.#include <stdio.h>#define SIZE 8int main(){double num1[SIZE], num2[SIZE];int index1, index2, index;printf("Enter 8 numbers to the first array:\n");for (index1 = 0; index1 < SIZE; index1++)scanf("%lf", &num1[index1]); //向第一个数组输入8个数 num2[0] = num1[0];for (index1 = 1, index2 = 1; index1 < SIZE; index1++, index2++) num2[index2] = num2[index2-1] + num1[index1];//为第二个数组赋值(是第一个数组对应的元素之和)printf("The first array: ");for (index=0; index < SIZE; index++) {printf("%6.2f", num1[index]);} //输出第一个数组的内容 printf("\nThe second array: ");for (index=0; index < SIZE; index++) {printf("%6.2f", num2[index]); //输出第二个数组的内容 }printf("\n");return 0;}15.#include <stdio.h>#include <string.h>#define SIZE 255int main(void){int index;char ch[SIZE];printf("Enter a line: ");for(index = 0, scanf("%c", &ch[0]); ch[index] != '\n';){index++;scanf("%c", &ch[index]);} //输入内容到字符数组中,回车时结束for(index += 1; index < SIZE; index++)ch[index] = '\0'; //将数组剩余空间补充为'\0'for(index = strlen(ch); index >=0; index--)printf("%c", ch[index]); //倒序输出内容printf("\n");return 0;}16.#include <stdio.h>#define RATE_DAPHNE 0.1#define RATE_DEIRDRE 0.05 //两人的利率#define MONEY 100int main(void){int year;double daphne = MONEY, deirdre = MONEY; //两人的初始投资额相同for (year = 1; daphne >= deirdre; year++){daphne += MONEY * RATE_DAPHNE;deirdre += deirdre * RATE_DEIRDRE;}//计算Deirdre投资额超过Daphne需要的年数和当时的金额printf("After %d year, Deirdre's investment will be more than Daphne's,\n""Daphne's investment will be $%lf,\nand Deirdre's investment will be $%lf.\n",year, daphne, deirdre); //输出结果return 0;}17.#include <stdio.h>#define INITIAL_MONEY 100 //账户初始金额为100万元#define ANNUAL_RATE 0.08 //年利率为8%int main(void){int year;double money;for(year = 1, money=INITIAL_MONEY; money>0; year++)money += money * ANNUAL_RATE - 10; //计算每年年终的账户余额printf("After %d years, Chuckie will draw all money from his account.\n", year);return 0;}18.#include <stdio.h>#define INITIAL_NUMBER 5 //初始朋友数为5人#define DUNBAR_NUMBER 150 //邓巴数int main(void){int week;int number = INITIAL_NUMBER;for (week = 1; number <= DUNBAR_NUMBER; week++){number = (number - week) * 2; //计算每周的朋友数量printf("After %d week, the number of Rabnud's friends is %d\n", week, number);}return 0;}第七章1.#include <stdio.h>int main(void){char ch;int n_space = 0; //空格数int n_newline = 0; //换行数int n_others = 0; //其他字符数printf("Enter some text; Enter # to quit.\n"); while ((ch = getchar()) != '#'){if (ch == ' ')n_space++;else if (ch == '\n')n_newline++;elsen_others++;}printf("Spaces: %d, newlines: %d, others: %d\n", n_space, n_newline, n_others);return 0;}2.#include <stdio.h>#define CHARS_PER_LINE 8 //每行字符数int main(void){char ch;int n_chars = 1; //字符数printf("Enter some characters(# to quit):\n"); while ((ch = getchar()) != '#'){printf("%3c(%3d) ", ch, ch);if (n_chars++ % CHARS_PER_LINE == 0)printf("\n");}printf("\n");return 0;}3.#include <stdio.h>int main(void){int num;int n_even = 0, n_odd = 0; //偶数和奇数个数int sum_even = 0, sum_odd = 0; //偶数和奇数和printf("Enter some integers(0 to quit):\n");scanf("%d", &num);while (num != 0){if (num % 2 == 0){n_even++;sum_even += num;} //计算偶数个数和偶数和else{n_odd++;sum_odd +=num;} //计算奇数个数和奇数和scanf("%d",&num);}printf("The number of even numbers is %d, ""and the everage of even numbers is %.2f\n",n_even, (n_even == 0) ? 0 : (float)sum_even / n_even); printf("The number of odd numbers is %d, ""and the everrage of odd numers is %.2f\n",n_odd, (n_odd == 0) ? 0 : (float)sum_odd / n_odd);return 0;}4.#include <stdio.h>int main(void){char ch;int n_repl = 0; //替换次数printf("Enter some texts(# to quit):\n");while ((ch = getchar()) != '#') {if (ch == '.'){ch = '!';n_repl++;} //替换句号else if (ch == '!'){printf("!");n_repl++;} //替换感叹号printf("%c", ch);}printf("\n%d substitutions were made.\n", n_repl);return 0;}5.#include <stdio.h>int main(void){char ch;int n_repl = 0; //替换次数printf("Enter some texts(# to quit):\n");while ((ch = getchar()) != '#') {switch (ch){case '.': ch = '!';n_repl++;break;case '!': printf("!");n_repl++;break;default: break;} //利用switch语句进行替换 printf("%c",ch);}printf("\n%d substitutions were made.\n", n_repl);return 0;}6.#include <stdio.h>int main(void){char ch;char last_ch = 0; //前一个字符int count=0;printf("Enter some texts(# to quit):\n");while ((ch = getchar()) != '#'){if ((ch == 'i') && (last_ch == 'e'))count++;last_ch = ch; //出现ei时,计数+1}printf("\"ei\" appeared %d times.\n", count);return 0;}7.#include <stdio.h>#define BASE 1000 //基本工资 100美元/h#define TIME 40 //超过40h为加班#define MUL 1.5 //加班时间算作平时的1.5倍#define RATE1 0.15 //前300美元的税率#define RATE2 0.2 //300-450美元的税率#define RATE3 0.25 //大于450美元的税率#define BREAK1 300 //税率的第一个分界点#define BREAK2 450 //税率的第二个分界点int main(void){double hour, tax, gross;printf("Input your work hours in a week: ");scanf("%lf", &hour);if (hour <= TIME)gross = hour * BASE;elsegross = TIME * BASE + (hour - TIME) * MUL * BASE; //计算总收入if (gross <= BREAK1)tax = gross * RATE1;else if (gross <= BREAK2)tax = BREAK1 * RATE1 + (gross - BREAK1) * RATE2;elsetax = BREAK1 * RATE1 + (BREAK2 - BREAK1) * RATE2+ (gross - BREAK2) * RATE3;//计算税金printf("Your gross income is $%.2lf\nYour tax is $%.2lf\n""Your net income is $%.2lf\n",gross, tax, (gross - tax));return 0;8.#include <stdio.h>#define BASE1 8.75#define BASE2 9.33#define BASE3 10.00#define BASE4 11.20//四种等级的基本工资#define TIME 40 //超过40h为加班#define MUL 1.5 //加班时间算作平时的1.5倍#define RATE1 0.15 //前300美元的税率#define RATE2 0.2 //300-450美元的税率#define RATE3 0.25 //大于450美元的税率#define BREAK1 300 //税率的第一个分界点#define BREAK2 450 //税率的第二个分界点int main(void){double base, hour, tax, gross;int count, num;const int LENGTH = 65; //*的长度printpart: for (count = 0; count < LENGTH; count++)printf("*");printf("\nEnter the number corresponding to the desired pay rate or action:\n");printf("%-36s%s","1) $8.75/hr", "2) $9.33/hr\n");printf("%-36s%s","3) $10.00/hr", "4) $11.20/hr\n");printf("%s\n", "5) quit");for (count = 0; count < LENGTH; count++)printf("*");printf("\n");//打印表格while (scanf("%d", &num) == 1) {switch (num){case 1: base = BASE1;break;case 2: base = BASE2;break;case 3: base = BASE3;break;case 4: base = BASE4;break;case 5: printf("quit.\n");return 0;default: printf("Please input the right option.\n");goto printpart;} //选择基本工资等级printf("Input your work hours in a week: ");scanf("%lf", &hour);if (hour <= TIME)gross = hour * base;elsegross = TIME * base + (hour - TIME) * MUL * base;//计算总收入if (gross <= BREAK1)tax = gross * RATE1;else if (gross <= BREAK2)tax = BREAK1 * RATE1 + (gross - BREAK1) * RATE2;elsetax = BREAK1 * RATE1 + (BREAK2 - BREAK1) * RATE2+ (gross - BREAK2) * RATE3;//计算税金printf("Your gross income is $%.2lf\nYour tax is $%.2lf\n" "Your net income is $%.2lf\n",gross, tax, (gross - tax));printf("\nYour next choice:\n");}return 0;}9.#include <stdio.h>int main(void){int div, prime;int num, count;int flag;printf("Input a positive integer: ");scanf("%d", &num);printf("The prime numbers in range:\n");for (prime = 2; prime <= num; prime++) //外层循环显示所有素数 {flag = 1;for (div = 2; (div * div) <= prime; div++){if (prime % div == 0)flag = 0;} //内层循环检验是否为素数 if (flag) //利用标记flag判断printf("%d ",prime);}printf("\n");return 0;}10.#include <stdio.h>#define RATE1 0.15#define RATE2 0.28#define SINGLE 17850 //单身人群的税率分界点#define HOST 23900 //户主人群的税率分界点#define MAR_SHA 29750 //已婚共有人群的分界点#define MAR_DEV 14875 //已婚离异人群的分界点int main(void){int num;double income, tax_break, tax;printpart: printf("Please enter Corresponding""figures to select the type\n");printf("1 single, 2 host, 3 married and shared, ""4 married but devoced and 5 to quit.\n");scanf("%d", &num);switch (num){case 1: tax_break = SINGLE;break;case 2: tax_break = HOST;break;case 3: tax_break = MAR_SHA;break;case 4: tax_break = MAR_DEV;break;case 5: printf("quit.\n");return 0;default: printf("Please input right number.");goto printpart; //回到输入阶段}printf("Enter your income: "); //指定种类和收入while (scanf("%lf", &income) == 1){if (income <= tax_break)tax = income * RATE1;elsetax = tax_break * RATE1 + (income - tax_break) * RATE2; //计算税金printf("The tax is $%.2lf.\n", tax);printf("Your next input: \n");goto printpart; //回到输入阶段}return 0;}11.#include <stdio.h>#include <ctype.h>#define ARTICHOKE 2.05 //洋蓟2.05美元/磅#define BEET 1.15 //甜菜1.15美元/磅#define CARROT 1.09 //胡萝卜1.09美元/磅#define DISCOUNT_LIMIT 100//包装费和运费打折要求订单100美元#define DISCOUNT_RATE 0.05 //折扣为%5#define BREAK1 5#define BREAK2 20 //装运费的分界点#define FEE1 6.5#define FEE2 14#define FEE3_RATE 0.5//不同重量区间的装运费,其中超过20磅的每续重一磅//增加0.5元int main(void){double weight;double weight_artichoke = 0;double weight_beet = 0;double weight_carrot = 0; //购买三种蔬菜的重量double total_weight; //总重量double veg_cost; //三种蔬菜总共花费double order_cost; //订单总额double total_cost; //费用总额double pack_tran_fee; //装运费double discount;int count = 0;char ch;printf("Please select the vegetables you want to buy:\n");printf("a: artichoke $%.2f/lb\n", ARTICHOKE);printf("b: beet $%.2f/lb\n", BEET);printf("c: carrot $%.2f/lb\n", CARROT);printf("q: quit.\n");//打印选择信息while ((ch = tolower(getchar())) != 'q'){// if (ch == '\n')// continue; //滤掉回车switch (ch){case 'a': printf("Input the weight of artichoke in pound: "); scanf("%lf", &weight);weight_artichoke += weight;count++;printf("Continue entering a, b, c or q: ");break;case 'b': printf("Input the weight of beet in pound: ");scanf("%lf", &weight);weight_beet += weight;count++;printf("Continue entering a, b, c or q: ");break;case 'c': printf("Input the weight of carrot in pound: ");scanf("%lf", &weight);weight_carrot += weight;count++;printf("Continue entering a, b, c or q: ");break;default: printf("Please enter the right character.");}while (getchar () != '\n')continue; //滤掉输入重量后面的所有字符}if (!count){printf("Bye.\n");return 0;} //开始输出q,直接退出total_weight = weight_artichoke + weight_beet + weight_carrot;veg_cost = weight_artichoke * ARTICHOKE + weight_beet * BEET+ weight_carrot * CARROT;discount = 0;if (veg_cost >= DISCOUNT_LIMIT){discount = veg_cost * DISCOUNT_RATE;order_cost = veg_cost - discount;}elseorder_cost = veg_cost; //折扣计算if (total_weight <= BREAK1)pack_tran_fee = FEE1;else if (total_weight <= BREAK2)pack_tran_fee = FEE2;elsepack_tran_fee = FEE2 + (total_weight - BREAK2) * FEE3_RATE;//装运费计算total_cost = order_cost + pack_tran_fee;printf("\nHere is what you choose:\n");if (weight_artichoke) {printf("artichoke Price: $%.2f/lb weight: %.2f pounds cost: $%.2f\n",ARTICHOKE, weight_artichoke, weight_artichoke * ARTICHOKE); }if (weight_beet) {printf("beet Price: $%.2f/lb weight: %.2f pounds cost: $%.2f\n",。
第二章:开始学习C++ n”;}<<endl; return 0;}double C2F(double t){return *t+32;}<<endl; return 0;}double convert(double t){return 63240*t;n"; return 0;}style(miles per gallon):"<<endl; cout<<Euro_style<<"L/100Km = "<<*Euro_style<<" mpg\n"; return 0;}Enter the automobile gasoline consumption figure inEuropean style(liters per 100 kilometers):Converts to . style(miles per gallon):L/100Km = mpgPress any key to continuestyle(miles per gallon):";double US_style;cin>>US_style;cout<<"Converts to European style(miles per gallon):"<<endl;cout<<US_style<<" mpg = "<< *US_style<<"L/100Km\n"; return 0;}style(miles per gallon):19Converts to European style(miles pergallon): 19 mpg = 100KmPress any key to continue第四章复合类型n";return 0;}rand<<endl<<snack[i].weight<<endl<<snack[i].calory<<endl<<endl;}return 0;}rand="A";eight=;snack[0].calory=200;snack[1].brand="B";snack[1].weight=;snack[1].calory=400;snack[2].brand="C";snack[2].weight=;snack[2].calory=500;for(int i=0;i<3;i++){cout << " brand: " << snack[i].brand<< endl; cout << " weight: " <<snack[i].weight << endl;cout << " calorie: " << snack[i].calory << endl<<endl;}delete [] snack;return 0;}et(); car* ps=newcar[num];for(int i=0;i<num;++i){cout<<"Car #"<<i+1<<":\n";cout<<"Please enter the make: ";getline(cin,ps[i].name); c out<<"Pleaseenter the year made: ";(cin>>ps[i].year).get();}cout<<"Here is your collection:\n";for(int i=0;i<num;++i)cout<<ps[i].year<<" "<<ps[i].name<<endl;delete [] ps;return 0;}#include <iostream>#include <string> usingnamespace std; structcar{string maker; intyear;};int main(){int number;cout << "How many cars do you wish to catalog "; cin >>number;car* a = new car[number];for (int i = 0; i < number; i++){cout << "Car #" << i+1 << ": " << endl; cout <<"Please enter the maker: "; ();getline(cin,a[i].maker);cout << "Please enter the year made: "; cin >>a[i].year;}cout << "Here is your collection: " << endl; for (inti = 0; i < number; i++)cout << a[i].year << " " << a[i].maker <<endl; delete [] a;return 0;}#include <iostream> usingnamespace std; struct car{char maker[20];int year;};int main(){int number;cout << "How many cars do you wish to catalog "; cin >>number;car* a = new car[number];for (int i = 0; i < number; i++){cout << "Car #" << i+1 << ": " << endl; cout <<"Please enter the maker: "; ();(a[i].maker, 20);cout << "Please enter the year made: "; cin >>a[i].year;}cout << "Here is your collection: " << endl; for (int i = 0; i < number; i++)cout << a[i].year << " " << a[i].maker <<endl; delete [] a;return 0;}n"; return 0;}n";return 0;}和的区别是:word != "done",因为当 word = done 一样时,返回值为1,不一样时才是返回0.;for(int k=0;k<=i;++k)cout<<"*";cout<<endl;}return 0;}第六章分支语句和逻辑运算符n"; break;case 'p':cout<<"A maple is a pianist.\n";break;case 't':cout<<"A maple is a tree.\n";break;case 'g':cout<<"A maple is a game.\n";}return 0;}#include <iostream> usingnamespace std; void show();int main(){show();char choice;while (cin >> choice){switch(choice){case 'c' : cout << "It's a carnivore.\n"; break;case 'p' : cout << "It's a pianist.\n"; break;case 't' : cout << "A maple is a tree.\n"; break;case 'g' : cout << "It's a game.\n"; break;default : cout << "Please enter a c, p, t, or g:";}}return 0;}void show(){cout << "Please enter one of the following choices: \n" "c) carnivore p) pianist\n""t) tree g) game\n";}display by name b. display by title\n"<<"c. display by bopname d. diplay by preference\n"<<"q. quit\n";char ch;bop member[5]={{"Wimp Macho","English Teacher","DEMON",0},{"Raki Rhodes","Junior Programmer","BOOM",1},{"Celia Laiter","Super Star","MIPS",2},{"Hoppy Hipman","Analyst Trainee","WATEE",1},{"Pat Hand","Police","LOOPY",2}};cout<<"Enter your choice:";while(cin>>ch&&ch!='q'){switch(ch){case 'a':for(int i=0;i<5;i++)cout<<member[i].fullname<<endl;break;case 'b':for(int i=0;i<5;i++)cout<<member[i].title<<endl; break;case 'c':for(int i=0;i<5;i++)cout<<member[i].bopname<<endl; break;case 'd':for(int i=0;i<5;i++){if(member[i].preference==0)cout<<member[i].fullname<<endl;else if(member[i].preference==1)cout<<member[i].title<<endl; e lseif(member[i].preference==2)cout<<member[i].bopname<<endl;}break;}cout<<"Next choice: ";}cout<<"Bye!\n";return 0;}#include <iostream> usingnamespace std; const intstrsize = 30; struct bop{char fullname[strsize];char title[strsize]; charbopname[strsize]; intpreference;};void show(); intmain(){bop A[5] ={{"Wimp Macho", "Teacher", "HAHA", 0},{"Raki Rhodes", "Junior Programmer", "LIAR", 1},{"Celia", "engineer", "MIPS", 2},{"Hoppy Hipman", "Analyst Trainee", "WAHU", 1},{"Pat Hand", "Student", "LOOPY", 2}};cout << "Benevolent Order of Programmers Report\n"; show();cout << "Enter your choice: "; charchoice;cin >> choice;while (choice != 'q'){switch(choice){case 'a' : cout << A[0].fullname << endl << A[1].fullname << endl<< A[2].fullname << endl << A[3].fullname << endl<< A[4].fullname << endl; break;case 'b' : cout << A[0].title << endl << A[1].title << endl<< A[2].title << endl << A[3].title << endl<< A[4].title << endl;break;case 'c' : cout << A[0].bopname << endl << A[1].bopname << endl<< A[2].bopname << endl << A[3].bopname << endl<< A[4].bopname << endl; break;case 'd' : cout << A[0].fullname << endl << A[1].title << endl<< A[2].bopname << endl << A[3].title << endl<< A[4].bopname << endl;break;default : cout << "That's not the proper choice.\n";}cout << "Next choice: ";cin >> choice;}cout << "Bye!\n";return 0;}void show(){cout << "a. display by name b. display by title\n"<< "c. display by bopname d. display by preference\n"<< "q. quit\n";}ame); c out<<"请输入第"<<i+1<<"位捐款人捐款的数目:"; cin>>ps[i].money;();}cout<<"Grand Patrons:\n";for(int i=0;i<num;++i)if(ps[i].money>10000){cout<<ps[i].name<<"\n"<<ps[i].money<<endl;++temp;}if(temp==0)cout<<"none\n";cout<<"Patrons:\n";for(int i=0;i<num;++i)if(ps[i].money<=10000){cout<<ps[i].name<<"\n"<<ps[i].money<<endl;++temp;}if(temp==0)cout<<"none\n";delete [] ps;return 0;}#include <iostream>#include <string> usingnamespace std; structcharity{string name;double money;};int main(){int number; intcount = 0;cout << "Please enter the number of donator: "; cin >>number;charity *pt = new charity[number]; for(int i = 0; i < number; i++){cout << "Please enter your name: "; ();getline(cin, pt[i].name);cout << "Please enter the money you are going to donate: "; cin >>pt[i].money;if(pt[i].money > 10000)count++;}if(count == 0)cout << "None(money > 10000)"; else{cout << "Grand Patron\n"; for(int i =0; i < number; i++){if(pt[i].money > 10000)cout << pt[i].name << " " << pt[i].money << endl;}}cout << endl;if(10 - count == 0)cout << "None(money < 10000)"; else {cout << "Patron\n";for(int i = 0; i < number; i++){if(pt[i].money < 10000)cout << pt[i].name << " " << pt[i].money << endl;}}return 0;}n"; exit(EXIT_FAILURE);}inFile>>ch; while()){++sum;inFile>>ch;}if())cout<<"End of file reached.\n";else if())cout<<"Input terminated by data mismatch.\n";elsecout<<"Input terminated for unkonwn reason.\n";cout<<"总共有"<<sum<<"个字符在这个文件中。
//******************6.15复习题**************************//*********** 6 **************************#include<stdio.h>int main(void){int i, j;for (i = 0; i < 4; i++) //外层循环控制行内层循环控制列{for (j = 0; j < 8; j++){printf("$");}printf("\n");}return 0;}//******************6.16 编程练习 **************************//****************** 一 **************************#include<stdio.h>#define SIZE 26int main(void){char array[SIZE];int index = 0;array[0] = 'a';printf("%c", array[0]);for (index = 1; index < SIZE; index++){array[index] = 'a' + index;printf("%c", array[index]);}return 0;}//****************** 二 **************************#include<stdio.h>int main(void){int i, j;//i控制行,j控制列计数作用for (i = 0; i < 5; i++){for (j = 0; j < =i ; j++){printf("$");}printf("\n");}return 0;}//****************** 三 ************************** #include<stdio.h>int main(void){int i;//外层循环控制行int j;//内层循环控制列char ch = 'F';for (i = 0; i < 6; i++){for (j = 0; j <= i; j++)printf("%c", ch-j );printf("\n");}return 0;}//****************** 四 ************************** #include<stdio.h>int main(void){int i;//外层循环控制行int j;//内层循环控制列char ch = 'A';for (i = 0; i < 6; i++){for (j = 0; j <= i; j++)printf("%c", ch++ );printf("\n");return 0;}//****************** 五(初版) **************************#include<stdio.h>int main(void){int i;//外层循环控制行int j;//内层循环控制列char c = '*';char ch = 'A';for (i = 0; i < 5; i++){for (j = 0; j <=(3-i) ; j++){printf("%c", c);}for (j = 0; j <=i; j++){printf("%c", ch+j);}for (j = 0; j <i ; j++){printf("%c", ch+(i-1)-j);//ch+i-1表示因为此句是从i=1,j=0开始执行的,所以需要i-1才能确保开始为A,i=1,j列A开始;i=2,j列B开始}printf("\n");}return 0;}//****************** 五(终版) **************************#include<stdio.h>int main(void){int i;//外层循环控制行int j;//内层循环控制列char c = ' ';char ch = 'A';for (i = 0; i < 5; i++)for (j = 0; j <= (3 - i); j++){printf("%c", c);}for (j = 0; j <= i; j++){printf("%c", ch + j);}for (j = 0; j < i; j++){printf("%c", ch + (i - 1) - j);//ch+i-1表示因为此句是从i=1,j=0开始执行的,所以需要i-1才能确保开始为A,i=1,j列A开始;i=2,j列B开始}printf("\n");}return 0;}//****************** 六 **************************#include<stdio.h>int main(void){int num;int i, j;int UP_limit;int DOWN_limit;printf("输入表格的下限和上限\n"); //表格的上下限表示输入的最大最小值(即一个范围值)。
scanf("%d %d", &DOWN_limit, &UP_limit);printf("数值平方立方\n");for (i = 0; i <=UP_limit-DOWN_limit; i++){for (j = 0; j < 3; j++){num = DOWN_limit + i;printf("%d %d %d\n", num, num*num, num*num*num);}printf("\n");return 0;}//****************** 七 **************************#include<stdio.h>#include<string.h> //strlen()函数,给出字符串中字符长度。
对应%zd; int main(void){char word[40];int num;//单词个数(长度)int i;int index;//数组下标printf("请输入单词\n");scanf("%s", word);num = strlen(word);index = num-1;printf("倒序打印\n");for (i = 0; i < num; i++){printf("%c", word[index]);index--;}return 0;}//****************** 八 **************************#include<stdio.h>int main(void){double num1=0.0, num2=0.0;double result=0.0;printf("输入两个浮点数\n");while (2 == scanf("%lf %lf", &num1, &num2)){result = (num1 - num2) / (num1 * num2);printf("两数之差除以两数乘积result=%lf\n", result);}printf("输入错误,请输入数字\n");return 0;}//****************** 玖 ************************** #include<stdio.h>double result(double n, double m);int main(void){double num1 = 0.0, num2 = 0.0;double num=0.0;printf("输入两个浮点数:");while (2 == scanf("%lf %lf", &num1, &num2)){num=result(num1,num2);printf("两数之差除以两数乘积:%lf\n", num);}printf("输入错误,请输入数字\n");return 0;}double result(double n, double m){double result=0.0;result = (n - m) / (n * m);return result;}//****************** 十 ************************** #include<stdio.h>int main(void){int lower = 0;//下限整数int upper = 0;//上限整数int i;//计数int temp=0;//用来存储整数int sum=0;//平方和printf("Enter lower and upper integer limits:");scanf("%d %d", &lower, &upper);temp = lower;while (upper > lower){for (i = 0; i <= upper - lower; i++){sum = sum + temp * temp;temp++;}printf("The sums of the squares from %d to %d is %d\n", lower * lower, upper * upper, sum);printf("Enter next set of limits:");scanf("%d %d", &lower, &upper);}printf("Done\n");return 0;}//****************** 十一 **************************#include<stdio.h>#include<string.h>int main(void){char num[100];int index ;//数组元素下标printf("读入8个整数\n");scanf("%s", num);printf("倒序打印8个整数\n");for (index = 7; index >= 0; index--){printf("%c", num[index]);}return 0;}//****************** 十二 **************************//****************** 十三 **************************#include<stdio.h>int main(void){int num[10];int i,j;int number=0;printf("输入基础元素");scanf("%d", num);number = num[0];num[0] = 1;printf("%d ", num[0]);for (i = 1; i < 8; i++){num[i] = num[i-1] * number;do{printf("%d ", num[i]);} while (0);}return 0;}//****************** 十四 **************************#include<stdio.h>int main(void){double num1[30];double num2[30];double sum = 0;//累加和int i = 0;int j=0;printf("请为第一个数组num1输入8个值:\n");for (i = 0; i < 8; i++)//用一个循环输入第一个数组值,并求得第二组数组;{if (scanf("%lf", &num1[i]) == 1){sum = sum + num1[i];num2[i] = sum;printf("%-4.lf", num1[i]);}else{printf("您输入了一个错误值!!!\n");break;}}printf("\n");for (i = 0; i < 8; i++)//用一个循环显示第一个数组值{printf("%-4.lf", num2[i]);}printf("\n");return 0;}//****************** 十五 ************************** #include<stdio.h>#include<string>int main(void){char array[255];int index = 0;//数组内容下标printf("请输入数组内容:\n");scanf("%s", array);index=strlen(array)-1;printf("倒序打印数组内容:\n");for (; index >=0; index--){printf("%c", array[index]);}return 0;}//****************** 十六 ************************** #include<stdio.h>int main(void){int year = 0;double Daphne = 100;double Deirdre = 100;do{Daphne = Daphne +10;Deirdre = Deirdre * 1.05;year++;} while (Deirdre <= Daphne);printf("%d年后Daphne的投资额超过Deirdre.\n此时Daphne的投资额为%lf美元,Deirdre的投资额为%lf美元.\n", year, Daphne, Deirdre);return 0;}//****************** 十七 **************************#include<stdio.h>int main(void){int year = 0;double CL = 100;do{CL = CL * 1.08 - 10;year++;} while (CL > 0);printf("%d年后,Chuckie会取完账户的钱,变成了穷鬼\n",year);return 0;}//****************** 十八 **************************#include<stdio.h>int main(void){double friends = 5;int week = 0;do{week++;friends = 2*(friends - week);printf("第%d周,有%.lf个朋友\n", week, friends);} while (friends <= 150);return 0;}。