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C程序设计谭浩强完整课后习题答案

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C程序设计(第四版)(谭浩强)第一章课后习题答案P006 向屏幕输出文字.#include<>代码均调试成功,若有失误大多不是代码问题.自已找找. int main(){printf("Welcome to \n");return 0; }P008 求两个数的和.#include<>int main(){int a,b,sum;a=5;b=4;sum=a+b;printf("The sum is %d .\n",sum);return 0;}P008 调用函数比较两个数的大小.#include<>int main(){int max(int x,int y); int a,b,c;scanf("%d,%d",&a,&b); c=max(a,b); printf("The max is %d .\n",c);return 0;}int max(int x,int y) {int z; if (x>y)z=x;elsez=y;return(z); }P015 三个数的大小.(数字0表示课后练习题)#include<>int main(){int a,b,c,d; int max(int x , int y , int z);printf("Please input 3 numbers :\n");scanf("%d %d %d",&a,&b,&c);d=max(a,b,c); printf("The max is :%d .\n",d); }int max(int x , int y , int z){int m;if (x>y && x>z) m=x;if (y>x && y>z)m=y;if (z>y && z>x)m=z;return (m); }C程序设计(第四版)(谭浩强)第2章课后习题答案算法——程序的灵魂P017 计算机1-5相乘的积.#include<>int main(){int i,s=1; for(i=1;i<6;i++) {s=s*i; n",s);return 0;}#include<> int main(){int i,s=1; for(i=1;i<12;i++) 可以是i=i+2{if(i%2!=0) s=s*i;elsecontinue; }printf("The sum is %d .\n",s);return 0;}P019 按要求输出80分以上的学生信息.暂时没法做.P019 判断2000-2500年中的闰年,并输出.年的概念是地球围绕太阳一周的时间（所谓公转周期）称为一年，这个周期是相当稳定的，很长时间也不会变动1秒，但是真正的一年是天（目前）。

所以，如果每年定义为365天的话，1年就会多出天，4年就会多出天，非常接近1天，这样闰年就出现了，也就是每4年要有1年设置为366天，来抵消这多出的1天。

规则为：·1）如果年份能被4整除，则该年计为闰年；可是，假如不做调整的话，当400年的时候，累计才多出天，接近于多出97天，闰年的设置却多出来100天，所以要在400年内，再撤销3个闰年。

怎么撤销呢就有了下面这个规则：·2）如果年份能被100整除，则不计为闰年；问题又来了，400年里有4个100年吧，去掉后四个100年后，又少了一个，所以再加一个规则就是：·3）如果年份能被400整除，则计为闰年。

简单说来每400年里设置了97个闰年，也就是400里的前3个100年不设置闰年，误差被调整到400年仅有天。

#include<>int main()int i;for(i=2000;i<=2200;i++){if((i%4==0 && i%100!=0)||i%400==0) printf("%d is a leap year !\n",i);elseprintf("%d is not a leap year !\n",i);}}P020 求(1)-(1/2)+(1/3)……+(1/99)-(1/100)的值.#include<>int main(){float sign=1 , sum=0 , deno , term ; for(deno=1;deno<=100;deno++){term=sign*(1/deno); sum=sum+term;sign=(-1)*sign; }printf("The sum of deno(指定值) is %f .\n",sum);return 0; #include<>int main()int i , num ,n ; printf("Please input a number :\n");{if(num%i==0) {n=1;break; }n=0; }if(n==0) {printf("It is do a prime number !"); } else{printf("It is not a prime number !");}return 0;}要求用流程图表示上列算法.要求用N-S图表示上列算法.…………还要伪代码P036 调换二个参数的值.#include<>int main(){char a='a',b='b',c;c=a;a=b;b=c;printf("a now is %c , b now is %c !\n",a,b);return 0;}P036 输入10个数,并输出最大的那一个数.#include<>int main(){int i,a[10],s=0 ;printf("Please input 10 numbers :\n");for(i=0;i<=9;i++){scanf("%d",&a[i]);}for(i=0;i<=9;i++){if (s<a[i]) s=a[i];}printf("%d is the biggest number !\n",s);return 0;}P036 按大小顺序输出一些数.#include<>int main(){int i , j , a[4] , s=0 ;printf("Please input 5 numbers :\n"); for (i=0 ; i<=4 ; i++){scanf("%d",&a[i]); }for (i=0 ; i<=3 ; i++) {for (j=i+1 ; j<=4 ; j++) {if (a[i]>a[j]) {s=a[i];a[i]=a[j];a[j]=s;}}}for (i=0 ; i<=4 ; i++) printf("%d-",a[i]);return 0;P036 求1至100的总合.#include<>int main(){int i , sum=0 ; for (i=0 ; i<101 ; i++)sum=sum+i;printf("The sum of one to one hundred is %d !\n",sum);return 0;}P036 判断一个数能否同时被3和5整除.#include<>int main(){int n ;printf("Please input a number :\n");scanf("%d",&n);if(n%3==0&&n%5==0) printf ("Can be devide by 3 and 5 !\n");elseprintf ("Can not be devide by 3 and 5 !\n");return 0;P036 输出100-200间的素数.#include<> #include<>qrt是求根,属数学函数.int main() {int i;for (i=100; i<=200; i++) if(prime_number(i) == 1) printf("%d ",i);return 0;}int prime_number(double m) {int j,k;k=(int)sqrt(m); for(j=2;j<=k;j++){if(m%j==0)return 0; }return 1;}#include<>#include<>int main(){int i;for(i=100;i<=200;i++) {if(prime(i)==1) printf ("%d is the prime number !\n",i);}return 0;}int prime(int j) {int m, n;m=(int)sqrt(j);for (n=2;n<=m;n++){if(j%n==0)return 0; }return 1;}请仿照来写.P036 最大公约数和最小公倍数.#include<> main (){int m, n, c, d;int gcd(); int lcm(); printf("Please input two number :\n");scanf("%d %d",&m,&n);c=gcd(m,n); y=x%y; x=temp; }return y; }int lcm(int x, int y) 于号降序,大于号升序.{ temp=x;x=y;y=temp;}for(i=1; i<=y; i++) {if(!((x*i)%y)) { return x*i;}}}最简单的C程序设计——顺序程序设计P037 把华氏温度转化为摄氏表示法.#include<>float F_to_C(float input_fah) {float output_cen; output_cen=9)*(input_fah-32);return output_cen; }float C_to_F(float input_cen){float output_fah;output_fah=5)*input_cen+32; return output_fah; }int main(){int choice;float input_fah,input_cen,output_fah,output_cen;printf("F_to_C press <1> and C_to_F press <2> !\n");scanf("%d",&choice);if(choice==1){printf("Please input fahrenheit :");scanf("%f",&input_fah);output_cen=F_to_C(input_fah);printf("The 华氏 is %d , 摄氏is %d .",(int)input_fah,(int)output_cen);}if(choice==2){printf("Please input centigrade :");scanf("%f",&input_cen);output_fah=C_to_F(input_cen);printf("The Centigrade is %d , and the Fahrenheit is %d .",(int)input_cen,(int)output_fah);}return 0;}P038 计算存款利息(关于精度问题).#include<>int main(){float p0=1000,r1=,r2=,r3=,p1,p2,p3;p1=p0*(1+r1);p2=p0*(1+r2);p3=p0*(1+r3/2)*(1+r3/2);printf("p1=%f\np2=%f\np3=%f\n",p1,p2,p3);return 0;}P055 大写转换成小写#include<>int main() 6个字母.{char c1, c2;c1='A';c2=c1+32;printf("%c %d",c2,c2);return 0;}P059 给出三角形边长,算出面积.#include<>#include<>int main(){double a=, b=, c=, s, area;s=(a+b+c)/2;area=sqrt(s*(s-a)*(s-b)*(s-c));printf("area is %f\n",area); return 0; }P065 求一无二次等式的根,默认两个不同根. #include<>#include<>int main(){double a,b,c,disc,x1,x2,p,q;scanf("%lf %lf %lf",&a,&b,&c);disc=b*b-4*a*c;p=-b/*a);q=sqrt(disc)/*a);x1=p+q;x2=p-q;printf("x1=%\nx2=%",x1,x2);return 0;}P071 用%f输出实数,只能得到六位小数.#include<>#include<>int main(){double a=; 以是float.printf("%.9f\n",a/3);return 0;}P072 float型数据的有效位数.#include<>#include<>int main(){float a; 33252,float精度6位,所以第七位后不可信.a=10000/;printf("%f\n",a);return 0;}P078 使用putchar函数输出. #include<>#include<>int main(){char a='B',b='O',c='Y';putchar(a);putchar(b);putchar(c);putchar('\n');putchar(101); p utchar(66);return 0;}P079 使用getchar得到字符. #include<>#include<>int main(){char a,b,c;a=getchar();b=getchar();c=getchar();putchar(a);putchar(b);putchar(c); putchar('\n');return 0;}P081 getchar得到大写,putchar输出小写. #include<>#include<>int main(){char a,b;a=getchar();b=a+32;putchar(b);putchar('\n');return 0;}P082 国民生产总值10年后的增长倍数.#include<>#include<>int main(){double p,r=,n=10;p=pow((1+r),n); printf("P is %lf when 10 yearslater .\n",p);return 0; }P082 求各种存款的利息数.#include<>#include<>int main(){double p,r,n; p=1000*(1+5*;printf("5 years is %lf !\n",p); f输出的是double型.p=(1000*(1+2*);p=(p*(1+3*);printf("5 years is %lf !\n",p); p=(1000*(1+3*);p=(p*(1+2*);printf("5 years is %lf !\n",p); 明,是一样的.p=1000*pow((1+,5);printf("5 years is %lf !\n",p); p=1000*pow((1+4),4*5);printf("5 years is %lf !\n",p); #include<>#include<>int main(){double m,r=,d=300000,p=6000;m=(log10(p/(p-d*r)))/(log10(1+r));printf("%.1lf",m); lf.return 0;}P084 字母密码转换,调用函数及临界处理.#include<>char printcode(char f){if(((int)f>86&&(int)f<91)||((int)f>118&&(int)f<123)) {return(f-26+4); }else{return(f+4);}}int main(){char a,b,c,d,e;printf("Please input :\n");a=getchar();b=getchar();c=getchar();d=getchar();e=getchar();printf("%c%c%c%c%c",printcode(a),printcode(b),printcode(c),p rintcode(d),printcode(e));putchar(putcharcode(a));putchar(putcharcode(b));putchar(putcharcode(c));putchar(putcharcode(d));putchar(putcharcode(e));return 0; lf 来实现,因为没有要求实部,所以格式中m不写.以转换,但要在某此条件下,例如输出和读入时,%c是字母,而%d 是数值,看着办.}选择结构程序设计P086 一无二次方程求根的二分支.#include<>#include<>int main(){double a,b,c,disc,x1,x2,p,q;scanf("%lf %lf %lf",&a,&b,&c);disc=b*b-4*a*c;if(disc<0) printf("This equation hasn't real roots\n");else{p=-b/*a);q=sqrt(disc)/*a);x1=p+q;x2=p-q;printf("x1=%\nx2=%",x1,x2);}return 0;}P087 二个数按大小输出.#include<>int main() {float a,b,t;scanf("%f %f",&a,&b); 如有个逗号.if(a>b){t=a;a=b;b=t;}printf("%,%\n",a,b);return 0;}P088 三个数按大小输出.#include<>int main() {float a,b,c,t;scanf("%f %f %f",&a,&b,&c);if(a>b) {t=a;a=b;b=t;}if(a>c) {t=a;a=c;c=t;}if(b>c) {t=b;b=c;c=t;}printf("%,%%\n",a,b,c);return 0;}P099 判断输入字符,并最终按小写输出.#include<>int main(){char ch;scanf("%c",&ch);ch=(ch>='A'&&ch<='Z')(ch+32):ch; printf("%c\n",ch);return 0;}P100 按要求输出相应的Y值.#include<>{int x,y;scanf("%d",&x);if(x>=0){if(x>0) {y=1;}else{y=0;}}else{y=-1;}printf("x=%d,y=%d",x,y);return 0;}P102 switch的简单应用. #include<>{char grade;scanf("%c",&grade);printf("Your score:");switch(grade){case'a':printf("85-100\n");break;case'b':printf("70-84\n");break;case'c':printf("60-69\n");break;case'd':printf("<60\n");break;default:printf("Enter data error!\n");}return 0;}P104 按输入执行操作,并且不分大小写. #include<>void action1(int x,int y){printf("x+y=%d\n",x+y);}void action2(int x,int y){printf("x*y=%d\n",x*y);}int main(){char ch;int a=15,b=23;ch=getchar();switch(ch){case'a':case'A':action1(a,b);break; case'b': case'B':action2(a,b);break;default:putchar('\a'); }return 0;}P106 用if的分支来做闰年问题#include<>int main(){int year,leap;printf("Please input the year:\n");scanf("%d",&year);if(year%4==0) {if(year%100==0) {if(year%400==0) {leap=1;}else{leap=0;}}else}}else{leap=0;}if(leap){printf("%d is ",year);}else{printf("%d is not ",year);}printf("a leap year !"); return 0;}P108 一元二次等式的全计算过程.#include<>#include<>int main(){double a,b,c,disc,x1,x2,realpart,imagpart;scanf("%lf %lf %lf",&a,&b,&c);printf("The equation ");if(fabs(a)<=1e-6) {printf("is not a quadratic !\n");printf("x1=x2=%lf",-c/b);}else{disc=b*b-4*a*c;if(fabs(disc)<=1e-6) {printf("has two equal roots : %lf\n",-b/(2*a));}else{if(disc>1e-6){x1=(-b+sqrt(disc))/(2*a);x2=(-b-sqrt(disc))/(2*a);printf("has distinct real roots : %lf and %lf \n",x1,x2);}else{realpart=-b/(2*a);imagpart=sqrt(-disc)/(2*a);printf("has complex roots: \n");printf("%lf + %lfi\n",realpart,imagpart);printf("%lf + %lfi\n",realpart,imagpart);}}}return 0;}P109 关于多个区间的计算,运费问题为例.#include<>int main(){double p,w,s,d,f;printf("p,w,s\n");scanf("%lf %lf %lf",&p,&w,&s);if(s<250){d=;f=p*w*s*(1-d);printf("%lf",f);}else if(s<500){d=;f=p*w*s*(1-d);printf("%lf",f);}else if(s<1000){d=;f=p*w*s*(1-d);printf("%lf",f);}else if(s<2000){d=;f=p*w*s*(1-d);printf("%lf",f);}else if(s<3000){d=;f=p*w*s*(1-d);printf("%lf",f);}else{d=;f=p*w*s*(1-d);printf("%lf",f);}return 0;}P0112 键盘输入三个数,输出最大者. #include<>int mina,mida,maxa;int max(int a,int b,int c){int m;if(a>b) {m=a;a=b;b=m;}if(a>c){m=a;a=c;c=m;}if(b>c){m=a;a=c;c=m;return (c); 以c是返回中最大的.}int main(){int a,b,c;printf("Please input 3 numbers :");scanf("%d %d %d",&a,&b,&c);printf("The max is %d !\n",max(a,b,c));return 0;}P0112 一个小于1000的数,有判定条件. #include<>#include<>int main(){double a,b;printf("Please input a number :");scanf("%lf",&a);if(a<1000){b=sqrt(a);else{printf("\a"); lf",b); return 0;}P0112 一个不多于5位的数,按条件输出.#include<>#include<>int main(){int i,a,b[4],count=0;printf("Please input a number (five-digit number) :");scanf("%d",&a);for(i=0;i<=4;i++){b[i]=a%10; a=a/10; if(b[i]!=0){count=count+1;}}printf("%d位数.\n",count);printf("分别输出每一位数字,如下:");for(i=4;i>=0;i--){printf("%d ",b[i]);}printf("\n");printf("倒序输出这一个数字,如下:");for(i=0;i<=4;i++){printf("%d",b[i]);}printf("\n");return 0;}P0112 按要求提成奖金(if写法).#include<>int main(){double a,b;printf("Please input profit amount :");scanf("%lf",&a);if(a<=10) {b=a*;}else if(a<=20) {b=1++(a-20)*;}else if(a<=60){b=1+++(a-40)*;}else if(a<=100){b=1++++(a-60)*;}else{b=1++++(a-100)*;}printf("The reward is %lf !\n",b);return 0;}P0112 按要求提成奖金(switch写法). #include<>double GetProfit(double c){printf("Please input profit amount :");scanf("%lf",&c);return (c); }int main(){double a;char c;printf("Your choice :\nA : 0-10 ;\nB : 10-20 ;\nC : 20-40 ;\nD :40-60 ;\nE : 60-100 ;\nF : 100-1000 ;\n");scanf("%c",&c); switch(c) { case'A':{ printf("The reward is %lf !\n",GetProfit(c)*;};break;}return 0;}P0112 键盘输入数值,然后排序输出.#include<>int main(){int a[10],i,j,m,n; printf("请输入数值的个数: (十个以内)");scanf("%d",&m); printf("请分别输入相对应个数的数值:");for(i=0;i<m;i++){scanf("%d",&a[i]);}for(i=0;i<m;i++){for(j=i+1;j<m;j++){if(a[i]>a[j]) 序.{n=a[i]; a[i]=a[j];a[j]=n;}}}for(i=0;i<m;i++){printf("%d",a[i]);}return 0;}C程序设计(第四版)(谭浩强)第五章课后习题答案循环结构程序设计P115 用while计算1至100的合.#include<>int main(){int i=1,sum=0;while(i<=100) {sum=sum+i;i++;}printf("The sum is %d .\n",sum);return 0;}P117 用do-while来做1至100的合. #include<>int main(){int i=1,sum=0;do{ sum=sum+i;i++;}while(i<=100);printf("The sum is %d .\n",sum);return 0;}P118 比较do-while与while的差别.#include<>int main(){int i,sum=0;printf("Please input a number :");scanf("%d",&i); while(i<=10){sum=sum+i;i++;}printf("The sum of 1-10 is %d .\n",sum);return 0;}#include<>int main(){int i,sum=0;printf("Please input a number :");scanf("%d",&i); 入11的话,先做操作,所以sum=11.do{sum=sum+i;i++;}while(i<=10); printf("The sum of 1-10 is %d .\n",sum);return 0;}P126 break的例子.#include<>int main(){int i,b=0,a,c;for(i=0;i<=1000;i++){printf("Please input amount :"); scanf("%d",&a);b=b+a;if(b>=100){break; }}c=b/i;printf("conut is %d , aver is %d ",i+1,c); return 0;}P127 continue的例子.#include<>int main(){int i;for(i=1;i<20;i++){if(i%3!=0){continue; }printf("%d ",i);}printf("\n");return 0;}P128 形成一个4*5的矩阵.#include<>int main(){int i,j,a=0; for(i=1;i<=4;i++) {for(j=1;j<=5;j++,a++) {if(a%5==0){printf("\n");}printf("%d\t",i*j);}}printf("\n");return 0;}P131 用一个交错的式子求哌的近似值.#include<>#include<>int main() {float s=1,n=1,m,sum=0,t;for(m=1;;m=m+2) { t=(s)*(n/m); { break;}sum=sum+t; s=s*(-1); }printf("四分之一哌的值是%f.\n",sum);printf("一个完整哌的值是%f.\n",sum*4);return 0;}掉注释,可运行.且后面的赋值会跟着它变成相应的类型.比如下面的m=1,其实得到的是m=.\n%f\n%f\n%f\n",m,a,b,c); 然扩展的是不会错的,截断的是会错的,比如float可以用%lf来输出,而不能用%d来输出.为int float就不同种类,一个是整数,一个是小数,float double同样是有小数点的!!!!么写<=38,要么写<39,边界问题一定要注意,不可以太随意!!!!{f3=f1+f2;printf("%12d\n",f3);f1=f2; f2=f3; 以不用到f3.}return 0;}P135 还是求素数,方法不一样.#include<>#include<>int main(){double num;int i;printf("Please input a number :");scanf("%lf",&num); for(i=2;i<=sqrt(num);i++) { if((int)num%i==0) {break; }} {printf("Yes %d",(int)num);}return 0;}P137 求100至200间的素数.#include<>.#include<>int main(){double j;int i,k=0;for(j=100;j<=200;j++){for(i=2;i<=sqrt(j);i++){if((int)j%i==0){break;}}k=k+1; 习一下,有助逻辑.if(i<=sqrt(j)){printf("Not %d ",(int)j);if(k%5==0) {printf("\n");}}else{printf("Yes %d ",(int)j);if(k%5==0){printf("\n");}}}return 0;P139 密码转换.#include<>int main(){char c;c=getchar();while(c!='\n') {if((c>='a'&&c<='z')||(c>='A'&&c<='Z')){if((c>='w'&&c<='z')||(c>='W'&&c<='Z')){c=c-22;}else{c=c+4;}printf("%c",c);c=getchar(); }}printf("\n"); r eturn 0;P140 最大公约数和最小公倍数.#include<> main (){int m, n, c, d;int gcd(); int lcm(); printf("Please input two number :\n");scanf("%d %d",&m,&n);c=gcd(m,n); y=x%y; x=temp; }return y; }int lcm(int x, int y) 小于号降序.{ temp=x;x=y;y=temp;}for(i=1; i<=y; i++) {if(!((x*i)%y)) { return x*i;}}}P140 判断一串输入的字符.#include<>int main(){char ch;int a=0,b=0,c=0,d=0,e=0;printf("Please input the string\n");while((ch=getchar())!='\n') { if(ch<='z'&&ch>='a'){a++;}else if(ch==' '){c++;}else if(ch<58&&ch>47){d++;}else if(ch<='Z'&&ch>='A'){b++;}。

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(完整版)谭浩强c程序设计课后习题答案

(完整版)谭浩强c程序设计课后习题答案

谭浩强c++程序设计课后答案娄警卫第一章1.5题#include <iostream> using namespace std; int main(){cout<<"This"<<"is"; cout<<"a"<<"C++"; cout<<"program."; return 0;1.6题#include <iostream> using namespace std; int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b="; cout<<c;cout<<endl;return 0;}1.7七题#include <iostream> using namespace std; int main(){int a,b,c;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl; return 0;}int f(int x,int y,int z) {int m;if (x<y) m=x;else m=y;if (z<m) m=z;return(m);}1.8题#include <iostream>using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl; return 0;}1.9题#include <iostream>using namespace std;int main(){int a,b,c;int add(int x,int y); cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl; return 0;}int add(int x,int y){int z;z=x+y;return(z);}第二章2.3题#include <iostream>using namespace std;int main(){char c1='a',c2='b',c3='c',c4='\101',c5='\116'; cout<<c1<<c2<<c3<<'\n';cout<<"\t\b"<<c4<<'\t'<<c5<<'\n';return 0;}2.4题#include <iostream>using namespace std;int main(){char c1='C',c2='+',c3='+';cout<<"I say: \""<<c1<<c2<<c3<<'\"';cout<<"\t\t"<<"He says: \"C++ is very interesting!\""<< '\n';return 0;}2.7题#include <iostream>using namespace std;int main(){int i,j,m,n;i=8;j=10;m=++i+j++;n=(++i)+(++j)+m;cout<<i<<'\t'<<j<<'\t'<<m<<'\t'<<n<<endl; return 0;}2.8题#include <iostream>using namespace std;int main(){char c1='C', c2='h', c3='i', c4='n', c5='a';c1+=4;c2+=4;c3+=4;c4+=4;c5+=4;cout<<"password is:"<<c1<<c2<<c3<<c4<<c5<<endl;return 0;}第三章3.2题#include <iostream>#include <iomanip>using namespace std;int main ( ){float h,r,l,s,sq,vq,vz;const float pi=3.1415926;cout<<"please enter r,h:";cin>>r>>h;l=2*pi*r;s=r*r*pi;sq=4*pi*r*r;vq=3.0/4.0*pi*r*r*r;vz=pi*r*r*h;cout<<setiosflags(ios::fixed)<<setiosflags(ios:: right)<<setprecision(2);cout<<"l= "<<setw(10)<<l<<endl;cout<<"s= "<<setw(10)<<s<<endl;cout<<"sq="<<setw(10)<<sq<<endl;cout<<"vq="<<setw(10)<<vq<<endl;cout<<"vz="<<setw(10)<<vz<<endl;return 0;}3.3题#include <iostream>using namespace std;int main (){float c,f;cout<<"请输入一个华氏温度:";cin>>f;c=(5.0/9.0)*(f-32); //注意5和9要用实型表示,否则5/9值为0cout<<"摄氏温度为:"<<c<<endl;return 0;};3.4题#include <iostream>using namespace std;int main ( ){char c1,c2;cout<<"请输入两个字符c1,c2:";c1=getchar(); //将输入的第一个字符赋给c1c2=getchar(); //将输入的第二个字符赋给c2cout<<"用putchar函数输出结果为:"; putchar(c1);putchar(c2);cout<<endl;cout<<"用cout语句输出结果为:";cout<<c1<<c2<<endl;return 0;}3.4题另一解#include <iostream>using namespace std;int main ( ){char c1,c2;cout<<"请输入两个字符c1,c2:";c1=getchar(); //将输入的第一个字符赋给c1c2=getchar(); //将输入的第二个字符赋给c2cout<<"用putchar函数输出结果为:"; putchar(c1);putchar(44);putchar(c2);cout<<endl;cout<<"用cout语句输出结果为:";cout<<c1<<","<<c2<<endl;return 0;}3.5题#include <iostream>using namespace std;int main ( ){char c1,c2;int i1,i2; //定义为整型cout<<"请输入两个整数i1,i2:";cin>>i1>>i2;c1=i1;c2=i2;cout<<"按字符输出结果为:"<<c1<<" , "<<c2<<endl;return 0;}3.8题#include <iostream>using namespace std;int main ( ){ int a=3,b=4,c=5,x,y;cout<<(a+b>c && b==c)<<endl;cout<<(a||b+c && b-c)<<endl;cout<<(!(a>b) && !c||1)<<endl;cout<<(!(x=a) && (y=b) && 0)<<endl;cout<<(!(a+b)+c-1 && b+c/2)<<endl; return 0;}3.9题include <iostream>using namespace std;int main ( ){int a,b,c;cout<<"please enter three integer numbers:";cin>>a>>b>>c;if(a<b)if(b<c)cout<<"max="<<c;elsecout<<"max="<<b;else if (a<c)cout<<"max="<<c;elsecout<<"max="<<a;cout<<endl;return 0;}3.9题另一解#include <iostream>using namespace std;int main ( ){int a,b,c,temp,max ;cout<<"please enter three integer numbers:";cin>>a>>b>>c;temp=(a>b)?a:b; /* 将a和b中的大者存入temp中*/max=(temp>c)?temp:c; /* 将a和b中的大者与c比较，最大者存入max*/cout<<"max="<<max<<endl;return 0;}3.10题#include <iostream>using namespace std;int main ( ){int x,y;cout<<"enter x:";cin>>x;if (x<1){y=x;cout<<"x="<<x<<", y=x="<<y;}else if (x<10) // 1≤x＜10{y=2*x-1;cout<<"x="<<x<<", y=2*x-1="<<y;}else// x≥10{y=3*x-11;cout<<"x="<<x<<",y=3*x-11="<<y;}cout<<endl;return 0;}3.11题#include <iostream>using namespace std; int main (){float score;char grade;cout<<"please enter score of student:"; cin>>score;while (score>100||score<0){cout<<"data error,enter data again.";cin>>score;}switch(int(score/10)){case 10:case 9: grade='A';break;case 8: grade='B';break;case 7: grade='C';break;case 6: grade='D';break;default:grade='E';}cout<<"score is "<<score<<", grade is "<<grade<<endl;return 0;}3.12题#include <iostream>using namespace std;int main (){long int num;intindiv,ten,hundred,thousand,ten_thousand,pla ce;/*分别代表个位,十位,百位,千位,万位和位数*/cout<<"enter an integer(0~99999):"; cin>>num;if (num>9999)place=5;else if (num>999)place=4;else if (num>99)place=3;else if (num>9)place=2;else place=1;cout<<"place="<<place<<endl;//计算各位数字ten_thousand=num/10000;thousand=(int)(num-ten_thousand*10000)/1 000;hundred=(int)(num-ten_thousand*10000-tho usand*1000)/100;ten=(int)(num-ten_thousand*10000-thousan d*1000-hundred*100)/10;indiv=(int)(num-ten_thousand*10000-thousa nd*1000-hundred*100-ten*10);cout<<"original order:";switch(place){case5:cout<<ten_thousand<<","<<thousand<<","< <hundred<<","<<ten<<","<<indiv<<endl;cout<<"reverse order:";cout<<indiv<<ten<<hundred<<thousand<<ten _thousand<<endl;break;case4:cout<<thousand<<","<<hundred<<","<<ten <<","<<indiv<<endl;cout<<"reverse order:";cout<<indiv<<ten<<hundred<<thousand<<en dl;break;case3:cout<<hundred<<","<<ten<<","<<indiv<<en dl;cout<<"reverse order:";cout<<indiv<<ten<<hundred<<endl;break;case 2:cout<<ten<<","<<indiv<<endl;cout<<"reverse order:";cout<<indiv<<ten<<endl;break;case 1:cout<<indiv<<endl;cout<<"reverse order:";cout<<indiv<<endl;break;}return 0;}3.13题#include <iostream>using namespace std;int main (){ long i; //i为利润floatbonus,bon1,bon2,bon4,bon6,bon10;bon1=100000*0.1; //利润为10万元时的奖金bon2=bon1+100000*0.075; //利润为20万元时的奖金bon4=bon2+100000*0.05; //利润为40万元时的奖金bon6=bon4+100000*0.03; //利润为60万元时的奖金bon10=bon6+400000*0.015; //利润为100万元时的奖金cout<<"enter i:";cin>>i;if (i<=100000)bonus=i*0.1;//利润在10万元以内按10%提成奖金else if (i<=200000)bonus=bon1+(i-100000)*0.075; //利润在10万元至20万时的奖金else if (i<=400000)bonus=bon2+(i-200000)*0.05; //利润在20万元至40万时的奖金else if (i<=600000)bonus=bon4+(i-400000)*0.03; //利润在40万元至60万时的奖金else if (i<=1000000)bonus=bon6+(i-600000)*0.015; //利润在60万元至100万时的奖金elsebonus=bon10+(i-1000000)*0.01; //利润在100万元以上时的奖金cout<<"bonus="<<bonus<<endl;return 0;}3.13题另一解#include <iostream>using namespace std;int main (){long i;float bonus,bon1,bon2,bon4,bon6,bon10; int c;bon1=100000*0.1;bon2=bon1+100000*0.075;bon4=bon2+200000*0.05;bon6=bon4+200000*0.03;bon10=bon6+400000*0.015;cout<<"enter i:";cin>>i;c=i/100000;if (c>10) c=10;switch(c){case 0: bonus=i*0.1; break;case 1: bonus=bon1+(i-100000)*0.075; break;case 2:case3:bonus=bon2+(i-200000)*0.05;break;case 4:case5:bonus=bon4+(i-400000)*0.03;break;case 6:case 7:case 8:case 9: bonus=bon6+(i-600000)*0.015; break;case 10: bonus=bon10+(i-1000000)*0.01;}cout<<"bonus="<<bonus<<endl;return 0;}3.14题#include <iostream>using namespace std;int main (){int t,a,b,c,d;cout<<"enter four numbers:";cin>>a>>b>>c>>d;cout<<"a="<<a<<", b="<<b<<", c="<<c<<",d="<<d<<endl;if (a>b){t=a;a=b;b=t;}if (a>c){t=a; a=c; c=t;}if (a>d){t=a; a=d; d=t;}if (b>c){t=b; b=c; c=t;}if (b>d){t=b; b=d; d=t;}if (c>d){t=c; c=d; d=t;}cout<<"the sorted sequence:"<<endl;cout<<a<<", "<<b<<", "<<c<<", "<<d<<endl; return 0;}3.15题#include <iostream>using namespace std;int main (){int p,r,n,m,temp;cout<<"please enter two positive integer numbers n,m:";cin>>n>>m;if (n<m){temp=n;n=m;m=temp; //把大数放在n中, 小数放在m中}p=n*m; //先将n和m的乘积保存在p中, 以便求最小公倍数时用while (m!=0) //求n和m的最大公约数{r=n%m;n=m;m=r;}cout<<"HCF="<<n<<endl;cout<<"LCD="<<p/n<<endl; // p是原来两个整数的乘积return 0;}3.16题#include <iostream>using namespace std;int main (){char c;int letters=0,space=0,digit=0,other=0;cout<<"enter one line::"<<endl;while((c=getchar())!='\n'){if (c>='a' && c<='z'||c>='A' && c<='Z')letters++;else if (c==' ')space++;else if (c>='0' && c<='9')digit++;elseother++;}cout<<"letter:"<<letters<<", space:"<<space<<", digit:"<<digit<<", other:"<<other<<endl;return 0;}3.17题#include <iostream>using namespace std;int main (){int a,n,i=1,sn=0,tn=0;cout<<"a,n=:";cin>>a>>n;while (i<=n){tn=tn+a; //赋值后的tn为i个a 组成数的值sn=sn+tn; //赋值后的sn为多项式前i项之和a=a*10;++i;}cout<<"a+aa+aaa+...="<<sn<<endl;return 0;}3.18题#include <iostream>using namespace std;int main (){float s=0,t=1;int n;for (n=1;n<=20;n++){t=t*n; // 求n!s=s+t; // 将各项累加}cout<<"1!+2!+...+20!="<<s<<endl;return 0;}3.19题#include <iostream>using namespace std;int main (){int i,j,k,n;cout<<"narcissus numbers are:"<<endl;for (n=100;n<1000;n++){i=n/100;j=n/10-i*10;k=n%10;if (n == i*i*i + j*j*j + k*k*k)cout<<n<<" ";}cout<<endl;return 0;}3.20题#include <iostream>using namespace std;int main(){const int m=1000; // 定义寻找范围int k1,k2,k3,k4,k5,k6,k7,k8,k9,k10;int i,a,n,s;for (a=2;a<=m;a++) // a是2~1000之间的整数，检查它是否为完数{n=0; // n用来累计a的因子的个数s=a; // s用来存放尚未求出的因子之和，开始时等于afor (i=1;i<a;i++) // 检查i是否为a 的因子if (a%i==0) // 如果i是a的因子{n++; // n加1，表示新找到一个因子s=s-i; // s减去已找到的因子，s的新值是尚未求出的因子之和switch(n) // 将找到的因子赋给k1,...,k10{case 1:k1=i; break; // 找出的笫1个因子赋给k1case 2:k2=i; break; // 找出的笫2个因子赋给k2case 3:k3=i; break; // 找出的笫3个因子赋给k3case 4:k4=i; break; // 找出的笫4个因子赋给k4case 5:k5=i; break; // 找出的笫5个因子赋给k5case 6:k6=i; break; // 找出的笫6个因子赋给k6case 7:k7=i; break; // 找出的笫7个因子赋给k7case 8:k8=i; break; // 找出的笫8个因子赋给k8case 9:k9=i; break; // 找出的笫9个因子赋给k9case 10:k10=i; break; // 找出的笫10个因子赋给k10}}if (s==0) // s=0表示全部因子都已找到了{cout<<a<<" is a 完数"<<endl;cout<<"its factors are:";if (n>1) cout<<k1<<","<<k2; // n>1表示a至少有2个因子if (n>2) cout<<","<<k3; // n>2表示至少有3个因子，故应再输出一个因子if (n>3) cout<<","<<k4; // n>3表示至少有4个因子，故应再输出一个因子if (n>4) cout<<","<<k5; // 以下类似if (n>5) cout<<","<<k6;if (n>6) cout<<","<<k7;if (n>7) cout<<","<<k8;if (n>8) cout<<","<<k9;if (n>9) cout<<","<<k10;cout<<endl<<endl;}}return 0;}3.20题另一解#include <iostream>using namespace std;int main(){int m,s,i;for (m=2;m<1000;m++){s=0;for (i=1;i<m;i++)if ((m%i)==0) s=s+i;if(s==m){cout<<m<<" is a完数"<<endl;cout<<"its factors are:";for (i=1;i<m;i++)if (m%i==0) cout<<i<<" ";cout<<endl;}}return 0;}3.20题另一解#include <iostream>using namespace std;int main(){int k[11];int i,a,n,s;for (a=2;a<=1000;a++){n=0;s=a;for (i=1;i<a;i++)if ((a%i)==0){n++;s=s-i;k[n]=i; // 将找到的因子赋给k[1]┅k[10]}if (s==0){cout<<a<<" is a 完数"<<endl;cout<<"its factors are:";for (i=1;i<n;i++)cout<<k[i]<<" ";cout<<k[n]<<endl;}}return 0;}3.21题#include <iostream>using namespace std;int main(){int i,t,n=20;double a=2,b=1,s=0;for (i=1;i<=n;i++){s=s+a/b;t=a;a=a+b; // 将前一项分子与分母之和作为下一项的分子b=t; // 将前一项的分子作为下一项的分母}cout<<"sum="<<s<<endl;return 0;} 3.22题#include <iostream>using namespace std;int main(){int day,x1,x2;day=9;x2=1;while(day>0){x1=(x2+1)*2; // 第1天的桃子数是第2天桃子数加1后的2倍x2=x1;day--;}cout<<"total="<<x1<<endl;return 0;}3.23题#include <iostream>#include <cmath>using namespace std;int main(){float a,x0,x1;cout<<"enter a positive number:"; cin>>a; // 输入a的值x0=a/2;x1=(x0+a/x0)/2;do{x0=x1;x1=(x0+a/x0)/2;}while(fabs(x0-x1)>=1e-5);cout<<"The square root of "<<a<<" is "<<x1<<endl;return 0;}3.24题#include <iostream>using namespace std;int main(){int i,k;for (i=0;i<=3;i++) // 输出上面4行*号{for (k=0;k<=2*i;k++)cout<<"*"; // 输出*号cout<<endl; //输出完一行*号后换行}for (i=0;i<=2;i++) // 输出下面3行*号{for (k=0;k<=4-2*i;k++)cout<<"*"; // 输出*号cout<<endl; // 输出完一行*号后换行}return 0;}3.25题#include <iostream>using namespace std;int main(){char i,j,k; /* i是a的对手;j是b的对手;k是c的对手*/for (i='X';i<='Z';i++)for (j='X';j<='Z';j++)if (i!=j)for (k='X';k<='Z';k++)if (i!=k && j!=k)if (i!='X' && k!='X' && k!='Z')cout<<"A--"<<i<<"B--"<<j<<" C--"<<k<<endl;return 0;}第四章4.1题#include <iostream>using namespace std;int main(){int hcf(int,int);int lcd(int,int,int);int u,v,h,l;cin>>u>>v;h=hcf(u,v);cout<<"H.C.F="<<h<<endl;l=lcd(u,v,h);cout<<"L.C.D="<<l<<endl;return 0;}int hcf(int u,int v){int t,r;if (v>u){t=u;u=v;v=t;}while ((r=u%v)!=0){u=v;v=r;}return(v);}int lcd(int u,int v,int h){return(u*v/h);}4.2题#include <iostream>#include <math.h>using namespace std;float x1,x2,disc,p,q;int main(){void greater_than_zero(float,float); void equal_to_zero(float,float);void smaller_than_zero(float,float); float a,b,c;cout<<"input a,b,c:";cin>>a>>b>>c;disc=b*b-4*a*c;cout<<"root:"<<endl;if (disc>0){greater_than_zero(a,b);cout<<"x1="<<x1<<",x2="<<x2<<endl; }else if (disc==0){equal_to_zero(a,b);cout<<"x1="<<x1<<",x2="<<x2<<endl;}else{smaller_than_zero(a,b);cout<<"x1="<<p<<"+"<<q<<"i"<<endl;cout<<"x2="<<p<<"-"<<q<<"i"<<endl;}return 0;}void greater_than_zero(float a,float b) /* 定义一个函数，用来求disc>0时方程的根*/{x1=(-b+sqrt(disc))/(2*a);x2=(-b-sqrt(disc))/(2*a);}void equal_to_zero(float a,float b) /* 定义一个函数，用来求disc=0时方程的根*/{x1=x2=(-b)/(2*a);}void smaller_than_zero(float a,float b) /* 定义一个函数，用来求disc<0时方程的根*/{p=-b/(2*a);q=sqrt(-disc)/(2*a);}4.3题#include <iostream>using namespace std;int main(){int prime(int); /* 函数原型声明*/int n;cout<<"input an integer:";cin>>n;if (prime(n))cout<<n<<" is a prime."<<endl;elsecout<<n<<" is not a prime."<<endl;return 0;}int prime(int n){int flag=1,i;for (i=2;i<n/2 && flag==1;i++)if (n%i==0)flag=0;return(flag);}4.4题#include <iostream>using namespace std;int main(){int fac(int);int a,b,c,sum=0;cout<<"enter a,b,c:";cin>>a>>b>>c;sum=sum+fac(a)+fac(b)+fac(c);cout<<a<<"!+"<<b<<"!+"<<c<<"!="<<sum<<e ndl;return 0;}int fac(int n){int f=1;for (int i=1;i<=n;i++)f=f*i;return f;}4.5题#include <iostream>#include <cmath>using namespace std;int main(){double e(double);double x,sinh;cout<<"enter x:";cin>>x;sinh=(e(x)+e(-x))/2;cout<<"sinh("<<x<<")="<<sinh<<endl;return 0;}double e(double x){return exp(x);}4.6题#include <iostream>#include <cmath>using namespace std;int main(){doublesolut(double ,double ,double ,double ); double a,b,c,d;cout<<"input a,b,c,d:";cin>>a>>b>>c>>d;cout<<"x="<<solut(a,b,c,d)<<endl;return 0;}double solut(double a,double b,double c,double d){double x=1,x0,f,f1;do{x0=x;f=((a*x0+b)*x0+c)*x0+d;f1=(3*a*x0+2*b)*x0+c;x=x0-f/f1;}while(fabs(x-x0)>=1e-5);return(x);}4.7题#include <iostream>#include <cmath>using namespace std;int main(){void godbaha(int);int n;cout<<"input n:";cin>>n;godbaha(n);return 0;}void godbaha(int n){int prime(int);int a,b;for(a=3;a<=n/2;a=a+2){if(prime(a)){b=n-a;if (prime(b))cout<<n<<"="<<a<<"+"<<b<<endl;}}}int prime(int m){int i,k=sqrt(m);for(i=2;i<=k;i++)if(m%i==0) break;if (i>k) return 1;else return 0;}4.8题#include <iostream>using namespace std;int main(){int x,n;float p(int,int);cout<<"input n & x:";cin>>n>>x;cout<<"n="<<n<<",x="<<x<<endl;;cout<<"P"<<n<<"(x)="<<p(n,x)<<endl; return 0;}float p(int n,int x){if (n==0)return(1);else if (n==1)return(x);elsereturn(((2*n-1)*x*p((n-1),x)-(n-1)*p((n-2),x))/n);}4.9题#include <iostream>using namespace std;int main(){void hanoi(int n,char one,char two,char three);int m;cout<<"input the number of diskes:"; cin>>m;cout<<"The steps of moving "<<m<<" disks:"<<endl;hanoi(m,'A','B','C');return 0;}void hanoi(int n,char one,char two,char three) //将n个盘从one座借助two座，移到three座{void move(char x,char y);if(n==1) move(one,three);else{hanoi(n-1,one,three,two);move(one,three);hanoi(n-1,two,one,three);}}void move(char x,char y){cout<<x<<"-->"<<y<<endl;}4.10题#include <iostream>using namespace std;int main(){void convert(int n);int number;cout<<"input an integer:";cin>>number;cout<<"output:"<<endl;if (number<0){cout<<"-";number=-number;}convert(number);cout<<endl;return 0;}void convert(int n){int i;char c;if ((i=n/10)!=0)convert(i);c=n%10+'0';cout<<" "<<c;}4.11题#include <iostream>using namespace std;int main(){int f(int);int n,s;cout<<"input the number n:";cin>>n;s=f(n);cout<<"The result is "<<s<<endl;return 0;}int f(int n){;if (n==1)return 1;elsereturn (n*n+f(n-1));}4.12题#include <iostream>#include <cmath>using namespace std;#define S(a,b,c) (a+b+c)/2#define AREA(a,b,c)sqrt(S(a,b,c)*(S(a,b,c)-a)*(S(a,b,c)-b)*(S(a,b,c) -c))int main(){float a,b,c;cout<<"input a,b,c:";cin>>a>>b>>c;if (a+b>c && a+c>b && b+c>a)cout<<"area="<<AREA(a,b,c)<<endl; elsecout<<"It is not a triangle!"<<endl; return 0;}4.14题#include <iostream>using namespace std;//#define LETTER 1int main(){char c;cin>>c;#if LETTERif(c>='a' && c<='z')c=c-32;#elseif(c>='A' && c<='Z')c=c+32;#endifcout<<c<<endl;return 0;}4.15题#include <iostream>using namespace std;#define CHANGE 1int main(){char ch[40];cout<<"input text:"<<endl;;gets(ch);#if (CHANGE){for (int i=0;i<40;i++){if (ch[i]!='\0')if (ch[i]>='a'&& ch[i]<'z'||ch[i]>'A'&& ch[i]<'Z')ch[i]+=1;else if (ch[i]=='z'||ch[i]=='Z')ch[i]-=25;}}#endifcout<<"output:"<<endl<<ch<<endl;return 0;}4.16题file#include <iostream>using namespace std;int a;int main(){extern int power(int);int b=3,c,d,m;cout<<"enter an integer a and its power m:"<<endl;cin>>a>>m;c=a*b;cout<<a<<"*"<<b<<"="<<c<<endl;d=power(m);cout<<a<<"**"<<m<<"="<<d<<endl; return 0;}4.16题fileextern int a;int power(int n){int i,y=1;for(i=1;i<=n;i++)y*=a;return y;}第五章5.1题#include <iostream>#include <iomanip>using namespace std;#include <math.h>int main(){int i,j,n,a[101];for (i=1;i<=100;i++)a[i]=i;a[1]=0;for (i=2;i<sqrt(100);i++)for (j=i+1;j<=100;j++){if(a[i]!=0 && a[j]!=0)if (a[j]%a[i]==0)a[j]=0; }cout<<endl;for (i=1,n=0;i<=100;i++){if (a[i]!=0){cout<<setw(5)<<a[i]<<" ";n++;}if(n==10){cout<<endl;n=0;}}cout<<endl;return 0;}5.2题#include <iostream>using namespace std;//#include <math.h>int main(){int i,j,min,temp,a[11];cout<<"enter data:"<<endl;for (i=1;i<=10;i++){cout<<"a["<<i<<"]=";cin>>a[i]; //输入10个数}cout<<endl<<"The original numbers:"<<endl;;for (i=1;i<=10;i++)cout<<a[i]<<" "; // 输出这10个数cout<<endl;;for (i=1;i<=9;i++) //以下8行是对10个数排序{min=i;for (j=i+1;j<=10;j++)if (a[min]>a[j]) min=j;temp=a[i]; //以下3行将a[i+1]～a[10]中最小者与a[i] 对换a[i]=a[min];a[min]=temp;}cout<<endl<<"The sorted numbers:"<<endl;for (i=1;i<=10;i++) // 输出已排好序的10个数cout<<a[i]<<" ";cout<<endl;return 0;}5.3题#include <iostream>using namespace std;int main(){int a[3][3],sum=0;int i,j;cout<<"enter data:"<<endl;;for (i=0;i<3;i++)for (j=0;j<3;j++)cin>>a[i][j];for (i=0;i<3;i++)sum=sum+a[i][i];cout<<"sum="<<sum<<endl;return 0;}5.4题#include <iostream>using namespace std;int main(){int a[11]={1,4,6,9,13,16,19,28,40,100};int num,i,j;cout<<"array a:"<<endl;for (i=0;i<10;i++)cout<<a[i]<<" ";cout<<endl;;cout<<"insert data:";cin>>num;if (num>a[9])a[10]=num;else。

《C语言程序设计》课后习题答案()谭浩强

《C语言程序设计》课后习题答案()谭浩强

第1章程序设计和C语言11.1什么是计算机程序11.2什么是计算机语言11.3C语言的发展及其特点31.4最简单的C语言程序51.4.1最简单的C语言程序举例61.4.2C语言程序的结构101.5运行C程序的步骤与方法121.6程序设计的任务141-5 #include <stdio.h>int main ( ){ printf ("**************************\n\n");printf(" Very Good!\n\n");printf ("**************************\n");return 0;}1-6#include <stdio.h>int main(){int a,b,c,max;printf("please input a,b,c:\n");scanf("%d,%d,%d",&a,&b,&c);max=a;if (max<b)max=b;if (max<c)max=c;printf("The largest number is %d\n",max); return 0;}第2章算法——程序的灵魂162.1什么是算法162.2简单的算法举例172.3算法的特性212.4怎样表示一个算法222.4.1用自然语言表示算法222.4.2用流程图表示算法222.4.3三种基本结构和改进的流程图262.4.4用N S流程图表示算法282.4.5用伪代码表示算法312.4.6用计算机语言表示算法322.5结构化程序设计方法34习题36第章最简单的C程序设计——顺序程序设计37 3.1顺序程序设计举例373.2数据的表现形式及其运算393.2.1常量和变量393.2.2数据类型423.2.3整型数据443.2.4字符型数据473.2.5浮点型数据493.2.6怎样确定常量的类型513.2.7运算符和表达式523.3C语句573.3.1C语句的作用和分类573.3.2最基本的语句——赋值语句593.4数据的输入输出653.4.1输入输出举例653.4.2有关数据输入输出的概念673.4.3用printf函数输出数据683.4.4用scanf函数输入数据753.4.5字符数据的输入输出78习题823-1 #include <stdio.h>#include <math.h>int main(){float p,r,n;r=0.1;n=10;p=pow(1+r,n);printf("p=%f\n",p);return 0;}3-2-1#include <stdio.h>#include <math.h>int main(){float r5,r3,r2,r1,r0,p,p1,p2,p3,p4,p5;p=1000;r5=0.0585;r3=0.054;r2=0.0468;r1=0.0414;r0=0.0072;p1=p*((1+r5)*5); // 一次存5年期p2=p*(1+2*r2)*(1+3*r3); // 先存2年期，到期后将本息再存3年期p3=p*(1+3*r3)*(1+2*r2); // 先存3年期，到期后将本息再存2年期p4=p*pow(1+r1,5); // 存1年期，到期后将本息存再存1年期，连续存5次p5=p*pow(1+r0/4,4*5); // 存活期存款。

C语言程序设计第三版谭浩强课后习题答案完整版

C语言程序设计第三版谭浩强课后习题答案完整版

C语言程序设计第三版谭浩强课后习题答案完整版第一章1.5请参照本章例题，编写一个C程序，输出以下信息：**************************解：”););}1.6输出其中最大值。

解：mian(){int a,b,c,max;printf(“请输入三个数a,b,c:\n”);scanf(“%d,%d,%d”,&a,&b,&c); max=a;if(max<b)max=b;if(max<c)max=c;printf(“最大数为：“%d”,max);\101abc AㄩN3.7 要将"China"译成密码，译码规律是：用原来字母后面的第4个字母代替原来的字母．例如，字母"A"后面第4个字母是"E"．"E"代替"A"。

因此，"China"应译为"Glmre"。

请编一程序，用赋初值的方法使cl、c2、c3、c4、c5五个变量的值分别为，’C’、’h’、’i’、’n’、’a’，经过运算，使c1、c2、c3、c4、c5分别变为’G’、’l’、’m’、’r’、’e’，并输出。

解：#include <stdio.h>{是}密码是Glmre3.9求下面算术表达式的值。

（1）x+a%3*(int)(x+y)%2/4设x=2.5,a=7,y=4.7（2）(float)(a+b)/2+(int)x%(int)y 设a=2,b=3,x=3.5,y=2.5 （1）2.5（2）3.53.10写出程序运行的结果。

main(){int i,j,m,n;i=8;（4）解：(1) 24 (2) 10 (3) 60 (4) 0 (5) 0 (6) 0第四章4．4若a=3，b=4，c=5，x=1.2，y=2.4，z=-3.6，u=51274，n=128765，c1=’a’，c2=’b’。

C语言程序设计第三版谭浩强课后习题答案完整版

C语言程序设计第三版谭浩强课后习题答案完整版

C语言程序设计第三版谭浩强课后习题答案完整版第一章1.5请参照本章例题，编写一个C程序，输出以下信息：**************************Very Good!**************************解：mian(){printf(“**************************”);printf(“\n”);printf(“Very Good!\n”);printf(“\n”);printf(“**************************”);} 1.6 编写一个程序，输入a、b、c三个值，输出其中最大值。

解：mian(){int a,b,c,max;printf(“请输入三个数a,b,c:\n”);scanf(“%d,%d,%d”,&a,&b,&c);max=a;if(max<b)max=b;if(max<c)max=c;printf(“最大数为：“%d”,max);}第三章3.6写出以下程序运行的结果。

main(){charc1=’a’,c2=’b’,c3=’c’,c4=’\101’,c5=’\116’;printf(“a%cb%c\tc%c\tabc\n”,c1,c2,c 3);printf(“\t\b%c %c”,c4,c5);}解：aaㄩbbㄩㄩㄩccㄩㄩㄩㄩㄩㄩabc AㄩN3.7 要将"China"译成密码，译码规律是：用原来字母后面的第4个字母代替原来的字母．例如，字母"A"后面第4个字母是"E"．"E"代替"A"。

因此，"China"应译为"Glmre"。

请编一程序，用赋初值的方法使cl、c2、c3、c4、c5五个变量的值分别为，’C’、’h’、’i’、’n’、’a’，经过运算，使c1、c2、c3、c4、c5分别变为’G’、’l’、’m’、’r’、’e’，并输出。