C语言大学实用教程+参考答案_苏小红

格式：doc
大小：3.97 MB
文档页数：86

下载文档原格式

c语言苏小红第五版第12章实验题答案

{int temp;
temp=*a;
*a=*b;
*b=temp;
}
void Swapnum(long *a,long *b)
{
long temp;
temp=*a;
*a=*b;
*b=temp;
}
void Swapscore(int *a,int *b)
{
int temp[M],i;
STUDENT stu[N];
printf("how many student?");
scanf("%d",&n);
InputScore(stu,n);
printf("计算每门课程的总分和平均分输入1\n");
printf("计算每个学生的总分和平均分输入2\n");
printf("按每个学生的总分由高到低输入3\n");
for(i=0;i<3;i++)
{temp[i]=a[i];
a[i]=b[i];
b[i]=temp[i];
}
}
int Ascending(int a,int b)
{
return a>b;
}
int Descending(int a,int b)
{
return a<b;
}
void DateNum(STUDENT stu[],int n)
#include<stdio.h>
#include<string.h>
#define N 30

《C语言程序设计》(苏小红)课后习题答案高等教育出版社

sca nf("%d", &year);
if(year%4==0&&year%400!=0||year%400==0)
{
flag=1;
lag==1)
餐4
P13
ttinc-udeAsfdio.hv
maino
宀
charclHao2Hbo3H-c二
prinff(=a%cb%cc%2rTQo2o3)八
4.1(2)
ttinc-udeAsfdio.hv
maino
infaH_kzbH—k5八p「inff(=aH%d%%』bH%d%%一rrab)八
4三3)
/bbrjr)
if(a>=0)
{
a=a;
prin tf("a=%f\n",a);
}
else
{
a=-a;
prin tf("a=%f\n",a);
}
}
5.2
#i nclude<stdio.h>
mai n()
{
int a;
prin tf("I nput a:"); sca nf("%d",&a);
if(a%2==0)
}
float x=18.5,y=4.6;
prin tf("%f\n",(float)(a*b)/2); prin tf("%d\n",(i nt)x%(i nt)y); }
3.1(2)
#i nclude<stdio.h>
mai n()
{
int x=32,y=81,p,q;
p=x++;

C语言苏小红版第六章习题答案

第六章习题1。

（1）#include〈stdio。

h〉main（）{int i,j，k；char space=’ ’；for（i=1；i〈=4;i++)｛for（j=1;j<=i；j++）｛printf("%c",space）;}for(k=1；k<=6;k++）{printf（"*")；}printf（"\n”）；}｝(2）＃include 〈stdio.h>main（）{int k = 4, n;for （n = 0；n < k; n++)｛if （n ％2 == 0）continue；k—-;}printf(”k = ％d，n = ％d\n”,k，n)；}（3)＃include 〈stdio。

h〉main（）{int k = 4, n;for （n = 0; n < k; n++）{if （n % 2 ==0）break；k—-；｝printf(”k = %d, n = %d\n"，k，n）;}2．（1）计算1+3+5+……99+101=＃include<stdio。

h>main（)｛int i,sum=0;for（i=1；i〈=101;i=i+2）{sum=sum+i；}printf(”sum=％d\n"，sum）;}(2）计算1*2＊3+3＊4＊5+。

..+99＊100＊101= #include〈stdio。

h〉main（)｛long i；long term,sum=0;for(i=1;i〈=99;i=i+2）{term=i*(i+1)＊(i+2）;sum=sum+term；｝printf(”sum=％ld",sum）；｝（3)计算a+aa+aaa+..。

+aa..。

a（n个a）的值＃include〈stdio.h>main( ）｛long term=0，sum=0；int a，i,n;printf（"input a,n：”）；scanf(”%d，%d”,&a，＆n）;for(i=1;i〈=n；i=i++)｛term=term*10+a；sum=sum+term;｝printf("sum=%ld\n”，sum）;｝（4 ）计算1—1/2+1/3—。

C语言程序设计苏小红版第五六单元答案

if(a==0) {
printf("该方程不是一元二次方程.\n"); } else if(b*b-4*a*c>0) {
d=sqrt(b*b-4*a*c); x1=(-b+d)/(2*a);
x2=(-b-d)/(2*a); printf("x1=%f,x2=%f\n",x1,x2); } else if(b*b-4*a*c==0)
#include<stdio.h> #include<math.h> main() {
float a,b,c,s,area; printf("请输入三边长:"); scanf("%f,%f,%f",&a,&b,&c); s=(a+b+c)/2; area=(float)sqrt(s*(s-a)*(s-b)*(s-c)); if((a+b>c)&&(a+c>b)&&(b+c>a)) {
printf("%d 年是闰年\n",year); } else {
printf("%d 年不是闰年\n",year); } }
5.7 #include<stdio.h> main() {
char ch; printf("请输入一个字母:"); ch=getchar(); if((ch>=65)&&(ch<=90)) {
int a,b; printf("请输入一个整数:"); scanf("%d",&a); b=a%2; if(b==0) {

《C语言程序设计》(苏小红)课后习题答案高等教育出版社.docx

3.1(1)#i nclude<stdio.h> mai n() {int a=12,b=3;float x=18.5,y=4.6;Prin tf("%f\n",(float)(a*b)/2); Prin tf("%d ∖n",(i nt)x%(i nt)y); } 3.1(2)#i nclude<stdio.h> mai n() {int x=32,y=81,p,q; p=x++; q=--y;Prin tf("%d %d ∖n",p,q); Prin tf("%d %d ∖n",x,y);} 3.2#i nclude<stdio.h> mai n() {int x,bθ,b1,b2,s; Prin tf("I nputx:"); SCa nf("%d", &x); b2=x∕100;b1= (x-b2*100)∕10;// 或(x%100)/10或 x/10%10;b0=x%10;S=b0*100+b1*10+b2;2.2 #i nclude<stdio.h> mai n() { float x=2.5,y=2.5,z=2.5; Prin tf("x=%f ∖n",x); Prin tf("y=%f\n",y);Prin tf("z=%f\n",z);}L r G ：V 乍 1\启言訪ett□M7V∙加炬=Ξ.539Qβ3⅞.50θβ09Pn)CC3s C)Cited after H .365 XeCnndw Uith retIlrn UdlUlC 6fe ⅛任琳续…Prin tf("s=%d ∖n",s); } 3.3#i nclude<stdio.h> #in clude<math.h> mai n() {float rate=0.0225;float n, CaPital,deposit;Prin tf("I nput n, capital:"); SCa nf("%f,%f', &n,&capital);deposit=capital*pow(1+rate, n); Prin tf("deposit=%f\n",deposit); } 3.4#i nclude<stdio.h> #in clude<math.h> mai n() {float a,b,c; double x,y;Prin tf("I nputa,b,c:");SCa nf("%f %f%f",&a,&b,&c); x=(-b+sqrt(b*b-4*a*c))∕(2*a); y=(-b-sqrt(b*b-4*a*c))∕(2*a); Prin tf("x=%f,y=%f\n",x,y); }4.1 (2)#i nclude<stdio.h> mai n() {int a=12,b=15; Prin习题44.1(1)#i nclude<stdio.h> mai n() {Char C 仁'a',c2='b',c3='c'; Printf("a%cb%cc%c ∖n",c1,c2,c3);1 G:\2O17-2O18gl 学期工作 l∖CitW4∙=3)⅛nc -udeA S fdio∙hvmain()宀infab SCanf(=%2d%*2s %2d =ooa⅛ob=Pllmf(=%d⅛2n=pbx4∙2 ⅛nc -ude A S fdio∙hvmain() 宀ongab f o a f ><y 八SCanf(=%d -%2rτ⅛oa ⅛ob x SCanf (=%→>%f∖rr⅛o x⅛oy )八PIlnff(=aH%d-bH%2rΓ0b)八PII nff (=X H %→>b H %f ∖n =x⅛八5」⅛nc -ude A Sfdio∙hvf o a f BPIlnff (=-n p uω√SCanf(=%f⅛a)八if(avH0)宀a dPilnff(=aH%f∖n=a)八e-se宀ωH i -Pilnff(=aH%f∖n=a)八5.2⅛nc -ude A Sfdio∙hvmain() 宀i n ωPIlnff (=-n p u ω√if(a%2==0){printf("a 是偶数");}else{printf("a 是奇数");}}5.3#include<stdio.h>#include<math.h>main(){floata,b,c,s,area;printf("Inputa,b,c:");scanf("%f%f%f",&a,&b,&c);if(a+b>c&&a+c>b&&b+c>a){s=(a+b+c)/2; area=(float)sqrt(s*(s-a)*(s-b)*(s-c));printf("area=%f\n",area);}else{Printf("不是三角形");}}5.4#include<stdio.h>#include<math.h>main(){floata,b,c,x,y;Printf("InPuta,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a==0){Printf(" 该方程不是一元二次方程\n");}if(b*b-4*a*c>0){x=(-b+sqrt(b*b-4*a*c))/(2*a); y=(-b-sqrt(b*b-4*a*c))/(2*a);Printf("x=%f,y=%f\n",x,y);}elseif(b*b-4*a*c==0){x=-b/(2*a);y=-b/(2*a);printf("x=%f,y=%f\n",x,y);}else{printf(" 该方程无实根\n");}}5.5#include<stdio.h>main(){intyear,flag;printf("Inputayear:");scanf("%d",&year);if(year%4==0&&year%400!=0||year%400==0){flag=1;}else{flag=0;}if(flag==1){ printf("%disaleapyear!\n",year);}else{ printf("%disnotaleapyear!\n",year);}}5.6#include<stdio.h>main(){intyear,flag;printf("Inputayear:");scanf("%d",&year);flag=year%400==0||year%4==0&&year%100!=0?1:0;if(flag==1&&flag!=0){printf("%disaleapyear!\n",year);}else{ printf("%disnotaleapyear!\n",year);}}5.7#include<stdio.h>main(){charch;printf("Inputch:");scanf("%c",&ch);if(ch>='a'&&ch<='z'){ch=getchar();ch=ch-32; printf("%c,%d\n",ch,ch);}elseif(ch>='A'&&ch<='Z'){ch=getchar();ch=ch+32; printf("%c,%d\n",ch,ch);}else{printf("%c",ch);}}5.8#include<stdio.h>main(){charch;printf("Inputch:");scanf("%c",&ch); if(ch>=48&&ch<=57) { printf("ch 是数字字符\n");}elseif(ch>=65&&ch<=90){printf("ch 是大写字母\n");}elseif(ch>=97&&ch<=122){printf("ch 是小写字母\n");}elseif(ch==32){printf("ch 是空格\n");}else{printf("ch 是其他字符\n");}}5.9#include<stdio.h>main(){intscore,grade;printf("Inputscore:");scanf("%d",&score);grade=score/10;if(score<0||score>100){printf("Inputerror\n");} if(score>=90&&score<=100){printf("%d--A\n",score);}elseif(score>=80&&score<90){printf("%d--B\n",score);} elseif(score>=70&&score<80) {printf("%d--C\n",score);} elseif(score>=60&&score<70) {printf("%d--D\n",score);}elseif(score>=0&&score<60){printf("%d--E\n",score);}}5.10#include<stdio.h>main(){intyear,month;printf("Inputyear,month:"); scanf("%d,%d",&year,&month);if(month>12||month<=0){printf("errormonth\n");}else{switch(year,month){case12:case10:case8:case7:case5:case3:case1:Prin tf("31 天∖n");break;case11:case9:case6:case4:Printf("30 天∖n");break;case2: if(year%4==0&&year!=0||year%400==0) {Printf("29 天∖n");}else{Printf("28 天∖n");} break;default:Printf("InPuterror∖n");}}}6.1(1)#include<stdio.h>main(){inti,j,k;charsPace='';for(i=1;i<=4;i++){ for(j=1;j<=i;j++) {Printf("%c",sPace);} for(k=1;k<=6;k++){Printf("*");}Printf("∖n");}}6.1(2)#include<stdio.h>main(){intk=4,n; for(n=0;n<k;n++){ if(n%2==0)continue;k--;}Printf("k=%d∖n,n=%d∖n",k,n);6.1(3)#include<stdio.h>main(){intk=4,n;for(n=0;n<k;n++){ if(n%2==0)break; k--;}printf("k=%d,n=%d\n",k,n);}6.2(1)#include<stdio.h>main(){inti,sum=0;for(i=1;i<=101;i++){sum=sum+i;}printf("sum=%d\n",sum);}6.2(2)#include<stdio.h>main(){longi;longterm,sum=0;for(i=1;i<=101;i=i+2){ term=i*(i+1)*(i+2); sum=sum+term;}printf("sum=%ld\n",sum);}6.2(4)#include<stdio.h>#include<math.h>main(){intn=1;floatterm=1.0,sign=1,sum=0; while(term<=-1e-4||term>=1e-4) {term=1.0/sign; sum=sum+term; sign=sign+n;n++;} printf("sum=%f\n",sum);} 6.2(5)#include<stdio.h> #include<math.h> main(){ intn=1,count=1; floatx; doublesum,term; printf("Inputx:");scanf("%f",&x); sum=x; term=x; do{term=-term*x*x/((n+1)*(n+2));sum=sum+term;n=n+2; count++;}while(fabs(term)>=1e-5);printf("sin(x)=%f,count=%d\n",sum,count);}6.3#include<stdio.h> main(){ intx=1,find=0; while(!find) {if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0){printf("x=%d\n",x); find=1; x++;}}}/*intx,find=0;for(x=1;!find;x++){ if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0) { printf("x=%d\n",x); find=1;}}}*/6.4#include<stdio.h>main(){inti,n;longp=1,m=1;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){p=i*i;m=i*i*i;printf("p=%d,m=%d\n",i,p,i,m);}}6.5#include<stdio.h>main(){floatc,f;for(c=-40;c<=110;c=c+10){f=9/5*c+32; printf("f=%f\n",f);}}6.6#include<stdio.h>#include<math.h>main(){intn;doublec=0.01875,x;do{ x=x*pow(1+c,12)-1000; n++;}while(x>0); printf("x=%d\n",x);}6.7#include<stdio.h>main()intn=0;floata=100.0,c;printf("Inputc:");scanf("%f",&c);do{a=a*(1+c);n++;}while(a<=200); printf("n=%d\n",n); }6.8#include<stdio.h>{#include<math.h>main(){intn=1,count=1;doublesum=1,term=1;while(fabs(term)>=1e-5){ term=pow(-1,count)*(1.0/(n+2)); sum=sum+term; n=n+2;count++;}sum=4*sum;printf("sum=%f,count=%d\n",sum,count); }6.9#include<stdio.h>#include<math.h>main(){intn=1,count=1;doublesum=1,term=1;while(fabs(term)>=1e-5){term=term*(1.0/n); sum=sum+term; n++;count++;}printf("sum=%f,count=%d\n",sum,count);}6.10#include<stdio.h> #include<math.h>main(){intx;for(x=100;x<=999;x++){ if(x==pow(x/100,3)+pow(x/10%10,3)+pow(x%10,3))printf("x=%d\n",x);}}6.11#include<stdio.h> main(){inti=0,n; longsum=0,term=1; printf("Inputn:"); scanf("%d",&n);do{ i++; term=term*i; sum=sum+term;}while(sum<n);printf("%d\n",i-1);} 6.12#include<stdio.h> main(){ inti,n,m,count=0,sum=0; printf("Inputn:"); scanf("%d",&n);for(i=1;i<=n;i++){ printf("Inputm:"); scanf("%d",&m); if(m>0){ sum=sum+m; count++;}else{ break;} printf("sum=%d,count=%d\n",sum,count); }6.13#include<stdio.h>main(){inti,n,m,count=0,sum=0;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){printf("Inputm:");scanf("%d",&m);if(m>0||m<0){sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.14#include<stdio.h>main(){intx,y,z;for(x=0;x<=17;x++){for(y=0;y<=25;y++){3*x+2*y+z==50;z=30-x-y;if(3*x+2*y+z==50&&x+y+z==30)printf("x=%d,y=%d,z=%d\n",x,y,z);}}}6.15#include<stdio.h>main(){intx,y;for(x=0;x<=98;x++)y=98-x;2*x+4*y==386;if(x+y==98&&2*x+4*y==386){printf("x=%d,y=%d\n",x,y);}}}6.16#include<stdio.h>main(){intx,y,z;for(x=0;x<=20;x++){for(y=0;y<=33;y++){3*y+5*x+z/3.0==100;z=100-x-y;if(5*x+3*y+z/3.0==100&&z+x+y==100){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}}6.17#include<stdio.h>main(){intx,y,z;for(x=1;x<=9;x++){for(y=1;y<=17;y++){10*x+5*y+z==100;z=50-x-y;if(10*x+5*y+z==100&&x+y+z==50&&z>0){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}7.1#include<stdio.h>intSquare(inti){returni*i;}intmain(){inti=0;i=Square(i);for(;i<3;i++){staticinti=1;i+=Square(i);printf("%d,",i);}printf("%d\n",i);return0;}7.2#include<stdio.h>inthour,minute,second;voidupdate(){second++;if(second==60){second=0;minute++;}if(minute==60){minute=0;hour++;}if(hour==24)hour=0;}voiddisplay(){printf("%d,%d,%d\n",hour,minute,second);} voiddelay(){intt;for(t=0;t<100000000;t++);}intmain(){inti;voidupdaye(),display(),delay();for(i=0;i<1000000;i++){update();display();delay();}return0;}7.3#include<stdio.h> intGetMax(inta,intb);intmain(){intx,y,max;printf("Inputx,y:"); scanf("%d,%d",&x,&y); max=GetMax(x,y);printf("max=%d\n",max); return0;}intGetMax(intm,intn){if(m>=n)returnm;elsereturnn;}7.4#include<stdio.h> intLCM(intn,intm);intmain(){inta,b;printf("Inputa,b:"); scanf("%d,%d",&a,&b);printf("%d\n",LCM(a,b)); return0;}intLCM(intn,intm)intx;intfind=0; for(x=1;!find;x++){if(x%n==0&&x%m==0){find=1;}} returnx-1;} 7.5#include<stdio.h> longFact(intn);intmain(){intm,a; printf("Inputm:"); scanf("%d",&m);for(a=1;a<=m;a++){ printf("%d!=%ld\n",a,Fact(a));}return0;} longFact(intn){inti; longresult=1;for(i=2;i<=n;i++) result*=i;returnresult;}7.6#include<stdio.h> longFact(intn);intmain(){intm; longret; printf("Inputm:"); scanf("%d",&m); ret=Fact(m);printf("ret=%d\n",ret);return0;}longFact(intn){inti; longresult=1,sum=0;for(i=2;i<=n;i++){ result*=i; sum=sum+result;} returnsum;} 7.7(1)#include<stdio.h> intGcd(inta,intb);intmain(){intm,n;printf("Inputm,n:"); scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return0;} intGcd(inta,intb){ intt,min,find=0; min=a<b?a:b; t=min; for(t=min;!find;t--) {a%t==0;b%t==0; if(a%t==0&&b%t==0) returnt;} find=1;} 7.7(2)#include<stdio.h> intGcd(inta,intb);intmain()intm,n;printf("Inputm,n:"); scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n)); return0;} intGcd(inta,intb){ intr,temp; r=a%b; if(r==0) returnb;elsedo{ temp=b; b=r; a=temp; r=a%b;}while(r!=0); returnb;} 8.1(1)#include<stdio.h> voidFunc(intx){x=2;} intmain(){intx=10;Func(x); printf("%d",x);return0;} 8.1(2)#include<stdio.h> voidFunc(intb[]){intj;for(j=0;j<4;j++){ b[j]=j;}} intmain(){ staticinta[]={5,6,7,8},i; Func(a); for(i=0;i<4;i++){{printf("%d",a[i]);}return0;}8.2(1)intPositiveNum(inta[],intn){inti,count=0;for(i=0;i<n;i++){if(a[i]>0)count++;}return0;}8.2(2)voidFib(longf[],longn){inti;f[0]=0;f[1]=1;for(i=2;i<n;i++){f[i]=f[i-1]+f[i-2];}}8.2(3)#include<stdio.h>intmain(){inta[10],n,max,min,maxPos,minPos;for(n=0;n<10;n++){scanf("%d",&a[n]);}max=min=a[0];maxPos=minPos=0;for(n=0;n<10;n++){if(a[n]>max){max=a[n];maxPos=n;}elseif(a[n]<min)min=a[n];minPos=n;}printf("max=%d,pos=%d\n",max,maxPos);printf("min=%d,pos=%d\n",min,minPos);return0;}8.3voidDivArray(int*pArray,intn){inti;{for(i=0;i<n;i++){ pArray[i]/=pAttay[0];}}8.4#include<stdio.h>#defineN40 intFailNum(intscore[],intn);voidReadScore(intscore[],intn);intmain(){intscore[N],n;printf("Inputn:");scanf("%d",&n);ReadScore(score,n);FailNum(score,n);printf("FailNumstudentsare%d\n",FailNum(score,n)); return0; } intFailNum(intscore[],intn){inti,count=0; for(i=0;i<n;i++){if(score[i]<60)count++;}returncount;}voidReadScore(intscore[],intn)inti;printf("Inputscore:"); for(i=0;i<n;i++){scanf("%d",&score[i]);}}8.5#include<stdio.h>#defineN40 intHighAver(intscore[],intn); intReadScore(intscore[]); intmain(){ intscore[N],n; n=ReadScore(score);printf("HighAverstudentsare%d\n",HighAver(score,n));return0;} intHighAver(intscore[],intn){ inti,count=0,sum=0,aver; for(i=0;i<n;i++){sum=sum+score[i]; aver=sum/n;} for(i=0;i<n;i++){if(score[i]>aver)count++;}returncount;}intReadScore(intscore[]){{inti=-1;do{i++;printf("Inputscore:");scanf("%d",&score[i]);}while(score[i]>=0);returni;}8.6#include<stdio.h>#defineN40 intReadScore(intscore[],longnum[]); intFindMax(intscore[],longnum[],intn);intmain(){intscore[N],n,max,num,t;longnum[N];t=FindMax(score,n);max=score[t];num=num[t];printf("max=%d,num=%d\n",max,num);return0;}intReadScore(intscore[],longnum[]){inti=-1;do{i++; printf("Inputstudent'sIDandscore:");scanf("%ld%d",&num[i],&score[i]);}while(num[i]>0&&score[i]>=0);returni;}intFindMax(intscore[],longnum[],intn){intmax,i;max=score[0];for(i=1;i<n;i++){if(score[i]>max)max=score[i];}returni;}8.7#include<stdio.h>#defineN40intRead(inta[]);intChangeArry(inta[],intn);intmain(){inta[N],n;printf("%d\n",ChangeArry(a,n));return0;}intRead(inta[]){inti;for(i=0;i<9;i++){printf("Inputa:");scanf("%d",&a[i]);returni;}intChangeArry(inta[],intn){intmax,min,i,maxpos,minpos,term; max=min=score[0];for(i=1;i<n;i++){if(a[i]>max) max=score[i]; maxpos=n;else(a[i]<min)min=a[i];minpos=n;temp=maxpos;maxpos=minpos;minpos=temp;}returna[i];}8.10#include<stdio.h>#defineN5voidmain(){inta[N][N];intsum=0;inti,j;Printf("请输入一个％d*%d 的矩阵∖n",N,N);for(i=0;i<N;i++){for(j=0;j<N;j++){scanf("%d",&a[i][j]);}}for(i=0;i<N;i++)for(j=0;j<N;j++){if(i==j||i+j==N-1) sum=sum+a[i][j];}}printf(" 对角线元素之和为：%d\n",sum);}8.11#include<stdio.h>#defineN2#defineM3{voidmain(){inta[N][M],b[N][M];inti,j,sum1=0,sum2=0,sum=0;Printf("请输入一个％d*%d 的矩阵∖n",N,M);for(i=0;i<N;i++){for(j=0;j<M;j++){scanf("%d",&a[i][j]);sum1=sum1+a[i][j];}}Printf("请输入一个%d*%d 的矩阵∖n",N,M);for(i=0;i<N;i++){for(j=0;j<M;j++){scanf("%d",&b[i][j]);sum2=sum2+a[i][j];}}sum=sum1+sum2;Printf("sum=%d∖n",sum);}8.12#include<stdio.h>#defineN7voidYangHui(inta[N][N],intn);voidmain(){inti,j,n,b[N][N];Printf("InPutn:");scanf("%d",&n);YangHui(b,n);for(i=0;i<n;i++)for(j=0;j<=i;j++){printf("%4d",b[i][j]);}printf("\n");}}voidYangHui(inta[N][N],intn){inti,j;for(i=0;i<n;i++){a[i][0]=1;a[i][i]=1;} for(i=2;i<n;i++){ for(j=1;j<i;j++) a[i][j]=a[i-1][j-1]+a[i-1][j];}}8.13#include<stdio.h>#defineN12 voidmain() {inti;intf[N]={1,1};printf("%d:%d\n",0,f[0]); printf("%d:%d\n",1,f[1]);for(i=2;i<N;i++) {f[i]=f[i-1]+f[i-2]; printf("%d:%d\n",i+1,f[i]);}}8.14#include<stdio.h>#include<stdlib.h> #include<time.h> #defineN6000 voidmain() { inta[N],i; intb1=0,b2=0,b3=0,b4=0,b5=0,b6=0;{floatp1,p2,p3,p4,p5,p6;srand(time(NULL));for(i=0;i<N;i++){a[i]=rand()%6+1;printf("%3d",a[i]);if(a[i]==1)b1++;if(a[i]==2)b2++;if(a[i]==3)b3++;if(a[i]==4)b4++;if(a[i]==5)b5++;if(a[i]==6)b6++;p1=(float)(b1/6000.0);p2=(float)(b2/6000.0);p3=(float)(b3/6000.0);p4=(float)(b4/6000.0);p5=(float)(b5/6000.0);p6=(float)(b6/6000.0);}Printf("骰子出现1 的概率：％.2f∖n",p1); Printf("骰子出现2 的概率：%.2f∖n",p2); Printf("骰子出现3 的概率：％.2f∖n",p3); Printf("骰子出现4 的概率：％.2f∖n",p4); Printf("骰子出现5 的概率：％.2f∖n",p5); Printf("骰子出现6 的概率：％.2f∖n",p6);}9.1(1)voidSwap(int*x,int*y){int*pTemp;//*pTemp 未进行初始化，*pTemp 指向哪里位置*pTemp=*x;*x=*y;*y=*pTemp;}9.1(2)voidSwap(int*x,int*y)int*pTemp; pTemp=x; x=y; {y=pTemp;}//错误，x,y 没有指向类型9.2#include<stdio.h>intmain(){inta[]={1,2,3,4,5};int*p=a;printf("%d,%d,%d,%d,%d,%d,%d\n",*p,*(++p),(*p)++,*p,*p--,--(*p),*p); return0; }9.3#include<stdio.h>voidSwap(int*x,int*y);intmain(){inta[6]={1,2,3,4,5,6},b[6]={11,22,33,44,55,66};inti;printf("BeforeArray\n");for(i=0;i<6;i++){printf("%d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}for(i=0;i<6;i++){Swap(&a[i],&b[i]);}printf("AfterArray\n");for(i=0;i<6;i++){printf("%d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}return0;}voidSwap(int*x,int*y)inttemp;temp=*x;*x=*y;*y=temp;}9.4#include<stdio.h>#defineN10 voidFindMaxMin(inta[],int*pMaxa,int*pMaxnum,int*pMina,int*pMinnum); intmain(){inta[N];inti,maxa,mina,maxnum,minnum;printf("Inputa:");for(i=0;i<10;i++){scanf("%d",&a[i]);}FindMaxMin(a,&maxa,&maxnum,&mina,&minnum);printf("maxa=%d,maxnum=%d,mina=%d,minnum=%d\n",maxa,maxnum,mina,minnum);return0;} voidFindMaxMin(inta[],int*pMaxa,int*pMaxnum,int*pMina,int*pMinnum){inti;*pMaxa=a[0];*pMina=a[0];*pMaxnum=0;*pMinnum=0;for(i=0;i<10;i++){if(a[i]>*pMaxa){*pMaxa=a[i];*pMaxnum=i;}elseif(a[i]<*pMina){*pMina=a[i];*pMinnum=i;}}}10.1voidMYStrcpy(char*dstStr,constchar*srcStr)while((*dstStr++=*srcStr++)!='\0'){}}10.2#include<stdio.h>main(){char*a="main(){char*a=%c%s%c;printf(a,34,a,34);}";printf(a,34,a,34);}10.3(1)unsignedintMyStrlen(char*p)main(){unsignedintlen;len=0;for(;*pa!='\0';pa++){len++;}returnlen;}10.3(2)unsignedintMyStrlen(chars[]){char*p=s;while(*p!='\0'){p++;}return(p-*p);}10.3(3)intMyStrcmp(char*p1,char*p2){for(;*p1==*p2;p1++,p2++){if(*p1=='\0')return-1;}return1;}10.3(4)intMyStrcmp(chars[],chart[]){inti;for(i=0;s[i]==t[i];i++){if(s[i]=='\0')return0;}returni;}10.3(5)#include<stdio.h>#include<string.h> intmain(){ charpassword[7]="secret"; charuserInput[81]; printf("InputPassword:"); scanf("%s",userInput); if(strcmp(userInput,password)==0) printf("Coorrectpassword!Welcometothesystem...\n");elseif(strcmp(userInput,password)<0) printf("Invalidpassword!userinput<password...\n");elseprintf("Invalidpassword!userinput>password...\n"); return0;} 10.4#include<stdio.h> #defineN24 unsignedintCountLetter(charstr[]);intmain(){chara[N]; printf("Inputaletter:\n");gets(a); printf("Thelengthoftheletteris:%d\n",CountLetter(a)); return0;} unsignedintCountLetter(charstr[]){ char*p=str; intc=0,flag=0; while(*p!='\0') { if(*p!='') flag=1;elseif(flag==1){c++; flag=0;}p++;}returnc+1;}12.1#include<stdio.h>typedefstructdata{intyear;intmonth;intday;}DATA;typedefstructwork{chara[14];charb[10];charc[6];}WORK; typedefstructstudent{charstudentName[10];charstudentSex;DATAbirthday;WORKprofession;}STUDENT;intmain(){STUDENTStu={"王刚",'M',{1991,5,19},{"信息工程系","学习人员","学生"}};printf("stu:%2s%3c%6d/%02d/%02d%4s,%4s,%4s\n",stu.studentName,stu.studentSex,st u.birthday.year,Stu.birthday.month,Stu.birthday.day,Stu.profeSSion.a,Stu.profeSSion.b,Stu.profeSSion.c);return0;}12.4#include<Stdio.h>#include<String.h>#defineN10typedefStructpeople{charpeopleName[10];}PEOPLE;intmain(){intSum1=0,Sum2=0,Sum3=0,Sum4=0;inti;charname[N][N];PEOPLEStu[5]={"zhang","li","wang"};printf("Entertheirname:\n");for(i=0;i<10;i++){getS(name[i]);if(strcmp(name[i],stu[0].peopleName)==0)sum1++;elseif(strcmp(name[i],stu[1].peopleName)==0) sum2++;elseif(strcmp(name[i],stu[2].peopleName)==0)sum3++;elsesum4++;}printf("stu:%4s%2d\n",stu[i].peopleName,sum[j]);printf("stu:%4s%2d\n",stu[1].peopleName,sum2);printf("stu:%4s%2d\n",stu[2].peopleName,sum3);printf("%2d\n",sum4);return0;}1。

《C语言程序设计》(苏小红)-课后习题答案-高等教育出版社

2.2#include<stdio.h>main(){float x=2.5,y=2.5,z=2.5;printf("x=%f\n",x);printf("y=%f\n",y);printf("z=%f\n",z);}3.1(1)#include<stdio.h>main(){int a=12,b=3;float x=18.5,y=4.6;}3.1(2)#include<stdio.h>main(){int x=32,y=81,p,q;p=x++;q=--y;printf("%d %d\n",p,q);printf("%d %d\n",x,y);}3.2#include<stdio.h>main(){int x,b0,b1,b2,s;printf("Inputx:");scanf("%d",&x);b2=x/100;b1=(x-b2*100)/10;//或(x%100)/10;或x/10%10;b0=x%10;s=b0*100+b1*10+b2;printf("s=%d\n",s);}3.3#include<stdio.h>#include<math.h>main(){float rate=0.0225;float n,capital,deposit;printf("Input n,capital:");scanf("%f,%f",&n,&capital);deposit=capital*pow(1+rate,n);printf("deposit=%f\n",deposit); }3.4#include<stdio.h>#include<math.h>main(){float a, b, c;double x, y;printf("Input a, b, c:");scanf("%f %f %f", &a, &b, &c);x=(-b+sqrt(b*b-4*a*c))/(2*a);y=(-b-sqrt(b*b-4*a*c))/(2*a);printf("x=%f,y=%f\n",x,y);}习题44.1(1)#include<stdio.h>main(){char c1='a',c2='b',c3='c';}4.1(2)#include<stdio.h>main(){int a=12,b=15;}4.1(3)#include<stdio.h>main(){int a,b;printf("%d,%d\n",a,b);}4.2#include<stdio.h>main(){long a,b;float x,y;scanf("%d,%d\n",&a,&b);scanf("%f,%f\n",&x,&y);printf("a=%d,b=%d\n",a,b);printf("x=%f,b=%f\n",x,y); }5.1#include<stdio.h>main(){float a;printf("Input a:");scanf("%f",&a);if(a>=0){a=a;printf("a=%f\n",a);}else{a=-a;printf("a=%f\n",a);}}5.2#include<stdio.h>main(){int a;printf("Input a:");scanf("%d", &a);if(a%2==0){printf("a是偶数");}else{printf("a是奇数");}}5.3#include<stdio.h>#include<math.h>main(){float a,b,c,s,area;printf("Input a, b, c:");scanf("%f %f %f", &a, &b, &c);if(a+b>c&&a+c>b&&b+c>a){s=(a+b+c)/2;area=(float)sqrt(s*(s-a)*(s-b)*(s-c));printf("area=%f\n",area);}else{printf("不是三角形");}}5.4#include<stdio.h>#include<math.h>main(){float a,b,c,x,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a==0){printf("该方程不是一元二次方程\n");}if(b*b-4*a*c>0){x=(-b+sqrt(b*b-4*a*c))/(2*a);y=(-b-sqrt(b*b-4*a*c))/(2*a);printf("x=%f,y=%f\n",x,y);}else if(b*b-4*a*c==0){x=-b/(2*a);y=-b/(2*a);printf("x=%f,y=%f\n",x,y);}else{printf("该方程无实根\n");}}5.5#include<stdio.h>main(){int year,flag;printf("Input a year:");scanf("%d",&year);if(year%4==0&&year%400!=0||year%400==0){flag=1;}else{flag=0;}if(flag==1){printf("%d is a leap year!\n",year);}else{printf("%d is not a leap year!\n",year);}}5.6#include<stdio.h>main(){int year,flag;printf("Input a year:");scanf("%d",&year);flag=year%400==0||year%4==0&&year%100!=0?1:0;if(flag==1&&flag!=0){printf("%d is a leap year!\n",year);}else{printf("%d is not a leap year!\n",year);}}5.7#include<stdio.h>main(){char ch;printf("Inputch:");scanf("%c",&ch);if(ch>='a'&&ch<='z'){ch=getchar();ch=ch-32;printf("%c,%d\n",ch,ch);}else if(ch>='A'&&ch<='Z'){ch=getchar();ch=ch+32;printf("%c,%d\n",ch,ch);}else{printf("%c",ch);}}5.8#include<stdio.h>main(){char ch;printf("Inputch:");scanf("%c",&ch);if(ch>=48&&ch<=57){printf("ch是数字字符\n");}else if(ch>=65&&ch<=90){printf("ch是大写字母\n");}else if(ch>=97&&ch<=122){printf("ch是小写字母\n");}else if(ch==32){printf("ch是空格\n");}else{printf("ch是其他字符\n");}}5.9#include<stdio.h>main(){int score,grade;printf("Input score:");scanf("%d",&score);grade=score/10;if(score<0||score>100){printf("Input error\n");}if(score>=90&&score<=100){printf("%d--A\n",score);}else if(score>=80&&score<90){printf("%d--B\n",score);}else if(score>=70&&score<80){printf("%d--C\n",score);}else if(score>=60&&score<70){printf("%d--D\n",score);}else if(score>=0&&score<60){printf("%d--E\n",score);}}5.10#include<stdio.h>main(){int year,month;printf("Input year,month:");scanf("%d,%d",&year,&month);if(month>12||month<=0){printf("error month\n");}else{switch(year,month){case12:case10:case8:case7:case5:case3:case1:printf("31天\n");break;case11:case9:case6:case4:printf("30天\n");break;case2:if(year%4==0&&year!=0||year%400==0){printf("29天\n");}else{printf("28天\n");}break;default:printf("Input error\n");}}}6.1(1)#include<stdio.h>main(){int i,j,k;char space='';for(i=1;i<=4;i++){for(j=1;j<=i;j++){printf("%c",space);}for(k=1;k<=6;k++){printf("*");}printf("\n");}}6.1(2)#include<stdio.h>main(){int k=4,n;for(n=0;n<k;n++){if(n%2==0)continue;k--;}printf("k=%d\n,n=%d\n",k,n);}6.1(3)#include<stdio.h>main(){int k=4,n;for(n=0;n<k;n++){if(n%2==0)break;k--;}printf("k=%d,n=%d\n",k,n);}6.2(1)#include<stdio.h>main(){int i,sum=0;for(i=1;i<=101;i++){sum=sum+i;}printf("sum=%d\n",sum);}6.2(2)#include<stdio.h>main(){long i;long term,sum=0;for(i=1;i<=101;i=i+2){term=i*(i+1)*(i+2);sum=sum+term;}printf("sum=%ld\n",sum);}6.2(4)#include<stdio.h>#include<math.h>main(){int n=1;float term=1.0,sign=1,sum=0;while(term<=-1e-4||term>=1e-4){term=1.0/sign;sum=sum+term;sign=sign+n;n++;}printf("sum=%f\n",sum);}6.2(5)#include<stdio.h>#include<math.h>main(){int n=1,count=1;float x;double sum,term;printf("Input x:");scanf("%f",&x);sum=x;term=x;do{term=-term*x*x/((n+1)*(n+2));sum=sum+term;n=n+2;count++;}while(fabs(term)>=1e-5);printf("sin(x)=%f,count=%d\n",sum,count);}6.3#include<stdio.h>main(){int x=1,find=0;while(!find){if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0){printf("x=%d\n",x);find=1;x++;}}}/*int x,find=0;for(x=1;!find;x++){if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0){printf("x=%d\n",x);find=1;}}}*/6.4#include<stdio.h>main(){int i,n;long p=1,m=1;printf("Input n:");scanf("%d",&n);for(i=1;i<=n;i++){p=i*i;m=i*i*i;printf("p=%d,m=%d\n",i,p,i,m);}}6.5#include<stdio.h>main(){float c,f;for(c=-40;c<=110;c=c+10){f=9/5*c+32;printf("f=%f\n",f);}}6.6#include<stdio.h>#include<math.h>main(){int n;double c=0.01875,x;do{x=x*pow(1+c,12)-1000;n++;}while(x>0);printf("x=%d\n",x);}6.7#include<stdio.h>main(){int n=0;float a=100.0,c;printf("Inputc:");scanf("%f",&c);do{a=a*(1+c);n++;}while(a<=200);printf("n=%d\n",n);}6.8#include<stdio.h>#include<math.h>main(){int n=1,count=1;double sum=1,term=1;while(fabs(term)>=1e-5){term=pow(-1,count)*(1.0/(n+2));sum=sum+term;n=n+2;count++;}sum=4*sum;printf("sum=%f,count=%d\n",sum,count); }6.9#include<stdio.h>#include<math.h>main(){int n=1,count=1;double sum=1,term=1;while(fabs(term)>=1e-5){term=term*(1.0/n);sum=sum+term;n++;count++;}printf("sum=%f,count=%d\n",sum,count);}6.10#include<stdio.h>#include<math.h>main(){int x;for(x=100;x<=999;x++){if(x==pow(x/100,3)+pow(x/10%10,3)+pow(x%10,3))printf("x=%d\n",x);}}6.11#include<stdio.h>main(){int i=0,n;long sum=0,term=1;printf("Inputn:");scanf("%d",&n);do{i++;term=term*i;sum=sum+term;}while(sum<n);printf("%d\n",i-1);}6.12#include<stdio.h>main(){int i,n,m,count=0,sum=0;printf("Input n:");scanf("%d",&n);for(i=1;i<=n;i++){printf("Inputm:");scanf("%d",&m);if(m>0){sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.13#include<stdio.h>main(){int i,n,m,count=0,sum=0;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){printf("Inputm:");scanf("%d",&m);if(m>0||m<0){sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.14#include<stdio.h>main(){int x,y,z;for(x=0;x<=17;x++){for(y=0;y<=25;y++){3*x+2*y+z==50;z=30-x-y;if(3*x+2*y+z==50&&x+y+z==30)printf("x=%d,y=%d,z=%d\n",x,y,z);}}}6.15#include<stdio.h>main(){int x,y;for(x=0;x<=98;x++){y=98-x;2*x+4*y==386;if(x+y==98&&2*x+4*y==386){printf("x=%d,y=%d\n",x,y);}}}6.16#include<stdio.h>main(){int x,y,z;for(x=0;x<=20;x++){for(y=0;y<=33;y++){3*y+5*x+z/3.0==100;z=100-x-y;if(5*x+3*y+z/3.0==100&&z+x+y==100){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}}6.17#include<stdio.h>main(){int x,y,z;for(x=1;x<=9;x++){for(y=1;y<=17;y++){10*x+5*y+z==100;z=50-x-y;if(10*x+5*y+z==100&&x+y+z==50&&z>0){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}}7.1#include<stdio.h>int Square(int i){return i*i;}int main(){int i=0;i=Square(i);for(;i<3;i++){static int i=1;i+=Square(i);printf("%d,",i);}printf("%d\n",i);return0;}7.2#include<stdio.h>int hour,minute,second;void update(){second++;if(second==60){second=0;minute++;}if(minute==60){minute=0;hour++;}if(hour==24)hour=0;}void display(){printf("%d,%d,%d\n",hour,minute,second); }void delay(){int t;for(t=0;t<100000000;t++);}int main(){int i;void updaye(),display(),delay();for(i=0;i<1000000;i++){update();display();delay();}return0;}7.3#include<stdio.h>int GetMax(int a,int b);int main(){int x,y,max;printf("Inputx,y:");scanf("%d,%d",&x,&y);max=GetMax(x,y);printf("max=%d\n",max);return0;}int GetMax(int m,int n){if(m>=n)return m;elsereturn n;}7.4#include<stdio.h>int LCM(int n,int m);int main(){int a,b;printf("Inputa,b:");scanf("%d,%d",&a,&b);printf("%d\n",LCM(a,b));return0;}int LCM(int n,int m){int x;int find=0;for(x=1;!find;x++){if(x%n==0&&x%m==0){find=1;}}return x-1;}7.5#include<stdio.h>long Fact(int n);int main(){int m,a;printf("Inputm:");scanf("%d",&m);for(a=1;a<=m;a++){printf("%d!=%ld\n",a,Fact(a));}return0;}long Fact(int n){int i;long result=1;for(i=2;i<=n;i++)result*=i;return result;}7.6#include<stdio.h>long Fact(int n);int main(){int m;long ret;printf("Inputm:");scanf("%d",&m);ret=Fact(m);printf("ret=%d\n",ret);return0;}long Fact(int n){int i;long result=1,sum=0;for(i=2;i<=n;i++){result*=i;sum=sum+result;}return sum;}7.7(1)#include<stdio.h>int Gcd(int a,int b);int main(){int m,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return0;}int Gcd(int a,int b){int t,min,find=0;min=a<b?a:b;t=min;for(t=min;!find;t--){a%t==0;b%t==0;if(a%t==0&&b%t==0)return t;}find=1;}7.7(2)#include<stdio.h> int Gcd(int a,int b);int main(){int m,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return0;}int Gcd(int a,int b){int r,temp;r=a%b;if(r==0)return b;elsedo{temp=b;b=r;a=temp;r=a%b;}while(r!=0);return b;}8.1(1)#include<stdio.h> void Func(int x){x=2;}int main(){int x=10;Func(x);printf("%d",x);return0;}8.1(2)#include<stdio.h> void Func(int b[]){int j;for(j=0;j<4;j++){b[j]=j;}}int main(){static int a[]={5,6,7,8},i;Func(a);for(i=0;i<4;i++){printf("%d",a[i]);}return0;}8.2(1)int PositiveNum(int a[],int n) {int i,count=0;for(i=0;i<n;i++){if(a[i]>0)count++;}return0;}8.2(2)void Fib(long f[],long n){int i;f[0]=0;f[1]=1;for(i=2;i<n;i++){f[i]=f[i-1]+f[i-2];}}8.2(3)#include<stdio.h>int main(){int a[10],n,max,min,maxPos,minPos;for(n=0;n<10;n++){scanf("%d",&a[n]);}max=min=a[0];maxPos=minPos=0;for(n=0;n<10;n++){if(a[n]>max){max=a[n];maxPos=n;}else if(a[n]<min){min=a[n];minPos=n;}}printf("max=%d,pos=%d\n",max,maxPos);printf("min=%d,pos=%d\n",min,minPos);return0;}8.3void DivArray(int*pArray,int n){int i;for(i=0;i<n;i++){pArray[i]/=pAttay[0];}}8.4#include<stdio.h>#define N40int FailNum(int score[],int n);void ReadScore(int score[],int n);int main(){int score[N],n;printf("Input n:");scanf("%d",&n);ReadScore(score,n);FailNum(score,n);printf("FailNum students are%d\n",FailNum(score,n));return0;}int FailNum(int score[],int n){int i,count=0;for(i=0;i<n;i++){if(score[i]<60)count++;}return count;}void ReadScore(int score[],int n){int i;printf("Input score:");for(i=0;i<n;i++){scanf("%d",&score[i]);}}8.5#include<stdio.h>#define N40int HighAver(int score[],int n);int ReadScore(int score[]);int main(){int score[N],n;n=ReadScore(score);printf("HighAver students are%d\n",HighAver(score,n));return0;}int HighAver(int score[],int n){int i,count=0,sum=0,aver;for(i=0;i<n;i++){sum=sum+score[i];aver=sum/n;}for(i=0;i<n;i++){if(score[i]>aver)count++;}return count;}int ReadScore(int score[]){int i=-1;do{i++;printf("Input score:");scanf("%d",&score[i]);}while(score[i]>=0);return i;}8.6#include<stdio.h>#define N40int ReadScore(int score[],long num[]);int FindMax(int score[],long num[],int n);int main(){int score[N],n,max,num,t;long num[N];t=FindMax(score,n);max=score[t];num=num[t];printf("max=%d,num=%d\n",max,num);return0;}int ReadScore(int score[],long num[]){int i=-1;do{i++;printf("Input student's ID and score:");scanf("%ld%d",&num[i],&score[i]);}while(num[i]>0&&score[i]>=0);return i;}int FindMax(int score[],long num[],int n){int max,i;max=score[0];for(i=1;i<n;i++){if(score[i]>max)max=score[i];}return i;}8.7#include<stdio.h>#define N40int Read(int a[]);int ChangeArry(int a[],int n);int main(){int a[N],n;printf("%d\n",ChangeArry(a,n));return0;}int Read(int a[]){int i;for(i=0;i<9;i++){printf("Input a:");scanf("%d",&a[i]);return i;}int ChangeArry(int a[],int n){int max,min,i,maxpos,minpos,term;max=min=score[0];for(i=1;i<n;i++){if(a[i]>max)max=score[i];maxpos=n;else(a[i]<min)min=a[i];minpos=n;temp=maxpos;maxpos=minpos;minpos=temp;}return a[i];}8.10#include<stdio.h>#define N5void main(){int a[N][N];int sum=0;int i,j;printf("请输入一个%d*%d的矩阵\n",N,N);for(i=0;i<N;i++){for(j=0;j<N;j++){scanf("%d",&a[i][j]);}}for(i=0;i<N;i++){for(j=0;j<N;j++){if(i==j||i+j==N-1)sum=sum+a[i][j];}}printf("对角线元素之和为：%d\n",sum);}8.11#include<stdio.h>#define N2#define M3void main(){int a[N][M],b[N][M];int i,j,sum1=0,sum2=0,sum=0;printf("请输入一个%d*%d的矩阵\n",N,M);for(i=0;i<N;i++){for(j=0;j<M;j++){scanf("%d",&a[i][j]);sum1=sum1+a[i][j];}}printf("请输入一个%d*%d的矩阵\n",N,M);for(i=0;i<N;i++){for(j=0;j<M;j++){scanf("%d",&b[i][j]);sum2=sum2+a[i][j];}}sum=sum1+sum2;printf("sum=%d\n",sum);}8.12#include<stdio.h>#define N7void YangHui(int a[N][N],int n);void main(){int i,j,n,b[N][N];printf("Input n:");scanf("%d",&n);YangHui(b,n);for(i=0;i<n;i++){for(j=0;j<=i;j++){printf("%4d",b[i][j]);}printf("\n");}}void YangHui(int a[N][N],int n){int i,j;for(i=0;i<n;i++){a[i][0]=1;a[i][i]=1;}for(i=2;i<n;i++){for(j=1;j<i;j++)a[i][j]=a[i-1][j-1]+a[i-1][j];}}8.13#include<stdio.h>#define N12void main(){int i;int f[N]={1,1};printf("%d:%d\n",0,f[0]);printf("%d:%d\n",1,f[1]);for(i=2;i<N;i++){f[i]=f[i-1]+f[i-2];printf("%d:%d\n",i+1,f[i]);}}8.14#include<stdio.h>#include<stdlib.h>#include<time.h>#define N6000void main(){int a[N],i;int b1=0,b2=0,b3=0,b4=0,b5=0,b6=0;float p1,p2,p3,p4,p5,p6;srand(time(NULL));for(i=0;i<N;i++){a[i]=rand()%6+1;printf("%3d",a[i]);if(a[i]==1)b1++;if(a[i]==2)b2++;if(a[i]==3)b3++;if(a[i]==4)b4++;if(a[i]==5)b5++;if(a[i]==6)b6++;p1=(float)(b1/6000.0);p2=(float)(b2/6000.0);p3=(float)(b3/6000.0);p4=(float)(b4/6000.0);p5=(float)(b5/6000.0);p6=(float)(b6/6000.0);}printf("骰子出现1的概率：%.2f\n",p1);printf("骰子出现2的概率：%.2f\n",p2);printf("骰子出现3的概率：%.2f\n",p3);printf("骰子出现4的概率：%.2f\n",p4);printf("骰子出现5的概率：%.2f\n",p5);printf("骰子出现6的概率：%.2f\n",p6);}9.1(1)void Swap(int*x,int*y){int*pTemp;//*pTemp未进行初始化，*pTemp指向哪里位置*pTemp=*x;*x=*y;*y=*pTemp;}9.1(2)void Swap(int*x,int*y){int*pTemp;pTemp=x;x=y;y=pTemp;}//错误，x,y没有指向类型9.2#include<stdio.h>int main(){int a[]={1,2,3,4,5};int*p=a;printf("%d,%d,%d,%d,%d,%d,%d\n",*p,*(++p),(*p)++,*p,*p--,--(*p),*p);return0;}9.3#include<stdio.h>void Swap(int*x,int*y);int main(){int a[6]={1,2,3,4,5,6},b[6]={11,22,33,44,55,66};int i;printf("Before Array\n");for(i=0;i<6;i++){printf("%d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}for(i=0;i<6;i++){Swap(&a[i],&b[i]);}printf("After Array\n");for(i=0;i<6;i++){printf("%d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}return0;}void Swap(int*x,int*y){int temp;temp=*x;*x=*y;*y=temp;}9.4#include<stdio.h>#define N10void FindMaxMin(int a[],int*pMaxa,int*pMaxnum,int*pMina,int*pMinnum);int main(){int a[N];int i,maxa,mina,maxnum,minnum;printf("Input a:");for(i=0;i<10;i++){scanf("%d",&a[i]);}FindMaxMin(a,&maxa,&maxnum,&mina,&minnum);printf("maxa=%d,maxnum=%d,mina=%d,minnum=%d\n",maxa,maxnum,mina,minnum);return0;}void FindMaxMin(int a[],int*pMaxa,int*pMaxnum,int*pMina,int*pMinnum){int i;*pMaxa=a[0];*pMina=a[0];*pMaxnum=0;*pMinnum=0;for(i=0;i<10;i++){if(a[i]>*pMaxa){*pMaxa=a[i];*pMaxnum=i;}else if(a[i]<*pMina){*pMina=a[i];*pMinnum=i;}}}10.1void MYStrcpy(char*dstStr,const char*srcStr){while((*dstStr++=*srcStr++)!='\0'){}}10.2#include<stdio.h>main(){char*a="main(){char*a=%c%s%c;printf(a,34,a,34);}";printf(a,34,a,34);} 10.3(1)unsigned int MyStrlen(char*p)main(){unsigned int len;len=0;for(;*pa!='\0';pa++){len++;}return len;}10.3(2)unsigned int MyStrlen(char s[]){char*p=s;while(*p!='\0'){p++;}return(p-*p);}10.3(3)int MyStrcmp(char*p1,char*p2){for(;*p1==*p2;p1++,p2++){if(*p1=='\0')return-1;}return1;}10.3(4)int MyStrcmp(char s[],char t[]){int i;for(i=0;s[i]==t[i];i++){if(s[i]=='\0')return0;}return i;}10.3(5)#include<stdio.h>#include<string.h>int main(){char password[7]="secret";char userInput[81];printf("Input Password:");scanf("%s",userInput);if(strcmp(userInput,password)==0)printf("Coorrect password!Welcome to the system...\n");else if(strcmp(userInput,password)<0)printf("Invalid password!user input<password...\n");elseprintf("Invalid password!user input>password...\n");return0;}10.4#include<stdio.h>#define N24unsigned int CountLetter(char str[]);int main(){char a[N];printf("Input a letter:\n");gets(a);printf("The length of the letter is:%d\n",CountLetter(a));return0;}unsigned int CountLetter(char str[]){char*p=str;int c=0,flag=0;while(*p!='\0'){if(*p!='')flag=1;else if(flag==1){c++;flag=0;}p++;}return c+1;}12.1#include<stdio.h>typedef struct data{int year;int month;int day;}DATA;typedef struct work{char a[14];char b[10];char c[6];}WORK;typedef struct student{char studentName[10];char studentSex;DATA birthday;WORK profession;}STUDENT;int main(){STUDENT stu={"王刚",'M',{1991,5,19},{"信息工程系","学习人员","学生"}};printf("stu:%2s%3c%6d/%02d/%02d%4s,%4s,%4s\n",stu.studentName,stu.studentSex,st u.birthday.year,stu.birthday.month,stu.birthday.day,stu.profession.a,stu.profession.b,stu.profession.c);return0;}12.4#include<stdio.h>#include<string.h>#define N10typedef struct people{char peopleName[10];}PEOPLE;int main(){int sum1=0,sum2=0,sum3=0,sum4=0;int i;char name[N][N];PEOPLE stu[5]={"zhang","li","wang"};printf("Enter their name:\n");for(i=0;i<10;i++){gets(name[i]);if(strcmp(name[i],stu[0].peopleName)==0)sum1++;else if(strcmp(name[i],stu[1].peopleName)==0) sum2++;else if(strcmp(name[i],stu[2].peopleName)==0) sum3++;elsesum4++;}printf("stu:%4s%2d\n",stu[i].peopleName,sum[j]);printf("stu:%4s%2d\n",stu[1].peopleName,sum2);printf("stu:%4s%2d\n",stu[2].peopleName,sum3);printf("%2d\n",sum4);return0;}。

C语言程序的设计苏小红版答案

2.2 #include<stdio.h>main(){float x=2.5,y=2.5,z=2.5;printf("x=%f\n",x);printf("y=%f\n",y);printf("z=%f\n",z);}3.1(1) #include<stdio.h>main(){int a=12,b=3;float x=18.5,y=4.6;printf("%d\n",(float)(a*b)/2);printf("%d\n",(int)x%(int)y); }3.2 #include<stdio.h>main(){int x,b0,b1,b2,s;printf("Inputx:");scanf("%d",&x);b2=x/100;b1=(x-b2*100)/10;b0=x%10;s=b0*100+b1*10+b2;printf("s=%d\n",s);}3.3 #include<stdio.h>#include<math.h>main(){float rate=0.0225;float n,capital,deposit;printf("Input n,capital:");scanf("%f,%f",&n,&capital);deposit=capital*pow(1+rate,n);printf("deposit=%f\n",deposit); }3.4 #include<stdio.h>#include<math.h>main(){float a,b,c;double x,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);x=(-b+sqrt(b*b-4*a*c))/(2*a);y=(-b-sqrt(b*b-4*a*c))/(2*a);printf("x=%f,y=%f\n",x,y);}4.1(1) #include<stdio.h>main(){char c1='a',c2='b',c3='c';printf("a%cb%cc%c\n",c1,c2,c3); }4.1(2) #include<stdio.h>main(){int a=12,b=15;printf("a=%d%%,b=%d%%\n",a,b); }4.1(3) #include<stdio.h>main(){int a,b;scanf("%2d%*2s%2d",&a,&b);printf("%d,%d\n",a,b);}4.2 #include<stdio.h>main(){long a,b;float x,y;scanf("%d,%d\n",&a,&b);scanf("%f,%f\n",&x,&y);printf("a=%d,b=%d\n",a,b);printf("x=%f,b=%f\n",x,y);}5.1 #include<stdio.h>main(){float a;printf("Innputa:");scanf("%f",&a);if(a>=0){a=a;printf("a=%f\n",a);}else{a=-a;printf("a=%f\n",a);}}5.2 #include<stdio.h>main(){int a;printf("Inputa:");scanf("%d",&a);if(a%2==0){printf("a是偶数");}else{printf("a是奇数");}}5.3 #include<stdio.h>#include<math.h>main(){float a,b,c,s,area;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a+b>c&&a+c>b&&b+c>a){s=(a+b+c)/2;area=(float)sqrt(s*(s-a)*(s-b)*(s-c));printf("area=%f\n",area);}else{printf("不是三角形");}}5.4 #include<stdio.h>#include<math.h>{float a,b,c,x,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a==0){printf("该方程不是一元二次方程\n");}if(b*b-4*a*c>0){x=(-b+sqrt(b*b-4*a*c))/(2*a);y=(-b-sqrt(b*b-4*a*c))/(2*a);printf("x=%f,y=%f\n",x,y);}else if(b*b-4*a*c==0){x=-b/(2*a);y=-b/(2*a);printf("x=%f,y=%f\n",x,y);}else{printf("该方程无实根\n");}}5.5 #include<stdio.h>main(){int year,flag;printf("Input a year:");scanf("%d",&year);if(year%4==0&&year%400!=0||year%400==0){flag=1;}else{flag=0;}if(flag==1){printf("%d is a leap year !\n",year);}{printf("%d is not a leap year !\n",year);}}5.6 #include<stdio.h>main(){int year,flag;printf("Input a year:");scanf("%d",&year);flag=year%400==0||year%4==0&&year%100!=0?1:0;if(flag==1&&flag!=0){printf("%d is a leap year !\n",year);}else{printf("%d is not a leap year !\n",year);}}5.7 #include<stdio.h>main(){char ch;printf("Inputch:");scanf("%c",&ch);if(ch>='a'&&ch<='z'){ch=getchar();ch=ch-32;printf("%c,%d\n",ch,ch);}else if(ch>='A'&&ch<='Z'){ch=getchar();ch=ch+32;printf("%c,%d\n",ch,ch);}else{printf("%c",ch);}}5.8 #include<stdio.h>main(){char ch;printf("Inputch:");scanf("%c",&ch);if(ch>=48&&ch<=57){printf("ch是数字字符\n");}else if(ch>=65&&ch<=90){printf("ch是大写字母\n");}else if(ch>=97&&ch<=122){printf("ch是小写字母\n");}else if(ch==32){printf("ch是空格\n");}else{printf("ch是其他字符\n");}}5.9 #include<stdio.h>main(){int score,grade;printf("Input score:");scanf("%d",&score);grade=score/10;if(score<0||score>100){printf("Input error\n");}if(score>=90&&score<=100){printf("%d--A\n",score);}else if(score>=80&&score<90) {printf("%d--B\n",score);}else if(score>=70&&score<80) {printf("%d--C\n",score);}else if(score>=60&&score<70) {printf("%d--D\n",score);}else if(score>=0&&score<60){printf("%d- -E\n",score);}}5.10 #include<stdio.h>main(){int year,month;printf("Input year,month:");scanf("%d,%d",&year,&month);if(month>12||month<=0){printf("error month\n");}else{switch(year,month){case 12:case 10:case 8:case 7:case 5:case 3:case 1:printf("31天\n");break;case 11:case 9:case 6:case 4:printf("30天\n");break;case 2:if(year%4==0&&year!=0||year%400==0){printf("29天\n");}else{printf("28天\n");}break;default:printf("Input error\n");}}}6.1(1) #include<stdio.h>main(){int i,j,k;char space=' ';for(i=1;i<=4;i++){for(j=1;j<=i;j++){printf("%c",space);}for(k=1;k<=6;k++){printf("*");}printf("\n");}}6.1(2) #include<stdio.h>main(){int k=4,n;for(n=0;n<k;n++){if(n%2==0) continue;k--;}printf("k=%d\n,n=%d\n",k,n);}6.1(3) #include<stdio.h>main(){int k=4,n;for(n=0;n<k;n++){if(n%2==0) break;k--;}printf("k=%d,n=%d\n",k,n);}6.2(1) #include<stdio.h>main(){int i,sum=0;for(i=1;i<=101;i++){sum=sum+i;}printf("sum=%d\n",sum);}6.2(2) #include<stdio.h>main(){long i;long term,sum=0;for(i=1;i<=101;i=i+2){term=i*(i+1)*(i+2);sum=sum+term;}printf("sum=%ld\n",sum);}6.2(4) #include<stdio.h>#include<math.h>main(){int n=1;float term=1.0,sign=1,sum=0;while(term<=-1e-4||term>=1e-4){term=1.0/sign;sum=sum+term;sign=sign+n;n++;}printf("sum=%f\n",sum);}6.2(5) #include<stdio.h>#include<math.h>main(){int n=1,count=1;float x;double sum,term;printf("Input x:");scanf("%f",&x);sum=x;term=x;do{term=-term*x*x/((n+1)*(n+2));sum=sum+term;n=n+2;count++;}while(fabs(term)>=1e-5);printf("sin(x)=%f,count=%d\n",sum,count);}6.3 #include<stdio.h>main(){int x=1,find=0;while(!find){if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0){printf("x=%d\n",x);find=1;x++;}}}/* int x,find=0;for (x=1;!find;x++){if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0){printf("x=%d\n",x);find=1;}}}*/6.4 #include<stdio.h>main(){int i,n;long p=1,m=1;printf("Input n:");scanf("%d",&n);for(i=1;i<=n;i++){p=i*i;m=i*i*i;printf("p=%d,m=%d\n",i,p,i,m);}}6.5 #include<stdio.h>main(){float c,f;for(c=-40;c<=110;c=c+10){f=9/5*c+32;printf("f=%f\n",f);}}6.6 #include<stdio.h>#include<math.h>main(){int n;double c=0.01875,x;do{x=x*pow(1+c,12)-1000;n++;}while(x>0);printf("x=%d\n",x);}6.7 #include<stdio.h>main(){int n=0;float a=100.0,c;printf("Inputc:");scanf("%f",&c);do{a=a*(1+c);n++;}while(a<=200);printf("n=%d\n",n);}6.8 #include<stdio.h>#include<math.h>main(){int n=1,count=1;double sum=1,term=1;while(fabs(term)>=1e-5){term=pow(-1,count)*(1.0/(n+2));sum=sum+term;n=n+2;count++;}sum=4*sum;printf( "sum=%f,count=%d\n",sum,count); }6.9 #include<stdio.h>#include<math.h>main(){int n=1,count=1;double sum=1,term=1;while(fabs(term)>=1e-5){term=term*(1.0/n);sum=sum+term;n++;count++;}printf("sum=%f,count=%d\n",sum,count); }6.10 #include<stdio.h>#include<math.h>main(){int x;for(x=100;x<=999;x++){if(x==pow(x/100,3)+pow(x/10%10,3)+pow(x%10,3))printf("x=%d\n",x);}}6.11 #include<stdio.h>main(){int i=0,n;long sum=0,term=1;printf("Inputn:");scanf("%d",&n);do{i++;term=term*i;sum=sum+term;}while(sum<n);printf("%d\n",i-1);}6.12 #include<stdio.h>main(){int i,n,m,count=0,sum=0;printf("Input n:");scanf("%d",&n);for(i=1;i<=n;i++){printf("Inputm:");scanf("%d",&m);if(m>0){sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.13 #include<stdio.h>main(){int i,n,m,count=0,sum=0;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){printf("Inputm:");scanf("%d",&m);if(m>0||m<0){sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.14 #include<stdio.h>main(){int x,y,z;for(x=0;x<=17;x++){for(y=0;y<=25;y++){3*x+2*y+z==50;z=30-x-y;if( 3*x+2*y+z==50&&x+y+z==30)printf("x=%d,y=%d,z=%d\n",x,y,z);}}}6.15 #include<stdio.h>main(){int x,y;for(x=0;x<=98;x++){y=98-x;2*x+4*y==386;if(x+y==98&&2*x+4*y==386){printf("x=%d,y=%d\n",x,y);}}}6.16 #include<stdio.h>main(){int x,y,z;for(x=0;x<=20;x++){for(y=0;y<=33;y++){3*y+5*x+z/3.0==100;z=100-x-y;if (5*x+3*y+z/3.0==100&&z+x+y==100){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}}6.17 #include<stdio.h>main(){int x,y,z;for(x=1;x<=9;x++){for(y=1;y<=17;y++){10*x+5*y+z==100;z=50-x-y;if( 10*x+5*y+z==100&&x+y+z==50&&z>0){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}}7.1 #include<stdio.h>int Square(int i){return i*i;}int main(){int i=0;i=Square(i);for( ;i<3;i++){static int i=1;i+=Square(i);printf("%d,",i);}printf("%d\n",i);return 0;}7.2 #include<stdio.h>int hour,minute,second;void update(){second++;if(second==60){second=0;minute++;}if(minute==60){minute=0;hour++;}if(hour==24)hour=0;}void display(){printf("%d,%d,%d\n",hour,minute,second);}void delay(){int t;for(t=0;t<100000000;t++);}int main(){int i;void updaye(),display(),delay();for(i=0;i<1000000;i++){update();display();delay();}return 0;}7.3 #include<stdio.h>int GetMax(int a,int b);int main(){int x,y,max;printf("Inputx,y:");scanf("%d,%d",&x,&y);max=GetMax(x,y);printf("max=%d\n",max);return 0;}int GetMax(int m,int n){if(m>=n)return m;elsereturn n;}7.4 #include<stdio.h>int LCM(int n,int m);int main(){int a,b;printf("Inputa,b:");scanf("%d,%d",&a,&b);printf("%d\n",LCM(a,b));return 0;}int LCM(int n,int m){int x;int find=0;for(x=1;!find;x++){if(x%n==0&&x%m==0){find=1;}}return x-1;}7.5 #include<stdio.h>long Fact(int n);int main(){int m,a;printf("Inputm:");scanf("%d",&m);for(a=1;a<=m;a++){printf("%d!=%ld\n",a,Fact(a));}return 0;}long Fact(int n){int i;long result=1;for(i=2;i<=n;i++)result*=i;return result;}7.6 #include<stdio.h>long Fact(int n);int main(){int m;long ret;printf("Inputm:");scanf("%d",&m);ret=Fact(m);printf("ret=%d\n",ret);return 0;}long Fact(int n){int i;long result=1,sum=0;for(i=2;i<=n;i++){result*=i;sum=sum+result;}return sum;}7.7(1) #include<stdio.h>int Gcd(int a,int b);int main(){int m,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return 0;}int Gcd(int a,int b){int t,min,find=0;min=a<b?a:b;t=min;for(t=min;!find;t--){a%t==0;b%t==0;if(a%t==0&&b%t==0)return t;}find=1;}7.7(2) #include<stdio.h> int Gcd(int a,int b);int main(){int m,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return 0;}int Gcd(int a,int b){int r,temp;r=a%b;if(r==0)return b;elsedo{temp=b;b=r;a=temp;r=a%b;}while(r!=0);return b;}8.1(1) #include<stdio.h>void Func(int x){x=2;}int main(){int x=10;Func(x);printf("%d",x);return 0;}8.1(2) #include<stdio.h> void Func(int b[]){int j;for(j=0;j<4;j++){b[j]=j;}}int main(){static int a[]={5,6,7,8},i;Func(a);for(i=0;i<4;i++){printf("%d",a[i]);}return 0;}8.2(1) int PositiveNum(int a[],int n) {int i,count=0;for(i=0;i<n;i++){if(a[i]>0)count++;}return 0;}8.2(2) void Fib(long f[],long n){int i;f[0]=0;f[1]=1;for(i=2;i<n;i++){f[i]=f[i-1]+f[i-2];}}8.2(3) #include<stdio.h>int main(){int a[10],n,max,min,maxPos,minPos;for(n=0;n<10;n++){scanf("%d",&a[n]);}max=min=a[0];maxPos=minPos=0;for(n=0;n<10;n++){if(a[n]>max){max=a[n];maxPos=n;}else if(a[n]<min){min=a[n];minPos=n;}}printf("max=%d,pos=%d\n",max,maxPos);printf("min=%d,pos=%d\n",min,minPos);return 0;}8.3 void DivArray(int *pArray,int n){int i;for(i=0;i<n;i++){pArray[i]/=pAttay[0];}}8.4 #include<stdio.h>#define N 40int FailNum(int score[],int n);void ReadScore(int score[],int n);int main(){int score[N],n;printf("Input n:");scanf("%d",&n);ReadScore(score,n);FailNum(score,n);printf("FailNum students are %d\n",FailNum(score,n));return 0;}int FailNum(int score[],int n){int i,count=0;for(i=0;i<n;i++){if(score[i]<60)count++;}return count;}void ReadScore(int score[],int n){int i;printf("Input score:");for(i=0;i<n;i++){scanf("%d",&score[i]);}}8.5 #include<stdio.h>#define N 40int HighAver(int score[],int n);int ReadScore(int score[]);int main(){int score[N],n;n=ReadScore(score);printf("HighAver students are %d\n",HighAver(score,n));return 0;}int HighAver(int score[],int n){int i,count=0,sum=0,aver;for(i=0;i<n;i++){sum=sum+score[i];aver=sum/n;}for(i=0;i<n;i++){if(score[i]>aver)count++;}return count;}int ReadScore(int score[]){int i=-1;do{i++;printf("Input score:");scanf("%d",&score[i]);}while(score[i]>=0);return i;}8.6 #include<stdio.h>#define N 40int ReadScore(int score[],long num[]);int FindMax(int score[],long num[],int n);int main(){int score[N],n,max,num,t;long num[N];t=FindMax(score,n);max=score[t];num=num[t];printf("max=%d,num=%d\n",max,num);return 0;}int ReadScore(int score[],long num[]){int i=-1;do{i++;printf("Input student's ID and score:");scanf("%ld%d",&num[i],&score[i]);}while(num[i]>0&&score[i]>=0);return i;}int FindMax(int score[],long num[],int n){int max,i;max=score[0];for(i=1;i<n;i++){if(score[i]>max)max=score[i];}return i;}8.7 #include<stdio.h>#define N 40int Read(int a[]);int ChangeArry(int a[],int n);int main(){int a[N],n;printf("%d\n",ChangeArry(a,n));return 0;}int Read(int a[]){int i;for(i=0;i<9;i++){printf("Input a:");scanf("%d",&a[i]);return i;}int ChangeArry(int a[],int n){int max,min,i,maxpos,minpos,term;max=min=score[0];for(i=1;i<n;i++){if(a[i]>max)max=score[i];maxpos=n;else(a[i]<min)min=a[i];minpos=n;temp=maxpos;maxpos=minpos;minpos=temp;}return a[i];}8.10 #include<stdio.h>#define N 5void main(){int a[N][N];int sum = 0;int i, j;printf("请输入一个%d*%d的矩阵\n",N,N);for(i = 0; i < N; i++){for(j = 0; j < N; j++){scanf("%d",&a[i][j]);}}for(i = 0; i < N; i++){for(j = 0; j < N; j++){if(i == j || i + j == N - 1)sum=sum+a[i][j];}}printf("对角线元素之和为：%d\n",sum);}8.11 #include<stdio.h>#define N 2#define M 3void main(){int a[N][M],b[N][M];int i,j,sum1=0,sum2=0,sum=0;printf("请输入一个%d*%d的矩阵\n",N,M);for(i = 0; i<N; i++){for(j = 0; j< M; j++){scanf("%d",&a[i][j]);sum1=sum1+a[i][j];}}printf("请输入一个%d*%d的矩阵\n",N,M);for(i = 0; i <N; i++){for(j = 0; j <M; j++){scanf("%d",&b[i][j]);sum2=sum2+a[i][j];}}sum=sum1+sum2;printf("sum=%d\n",sum);}8.12 #include<stdio.h>#define N 7void YangHui(int a[N][N],int n);void main(){int i,j,n,b[N][N];printf("Input n:");scanf("%d",&n);YangHui(b,n);for(i=0;i<n;i++){for(j=0;j<=i;j++){printf("%4d",b[i][j]);}printf("\n");}}void YangHui(int a[N][N],int n){int i,j;for(i=0;i<n;i++){a[i][0]=1;a[i][i]=1;}for(i=2;i<n;i++){for(j=1;j<i;j++)a[i][j]=a[i-1][j-1]+a[i-1][j];}}8.13 #include<stdio.h>#define N 12void main(){int i;int f[N]={1,1};printf("%d:%d\n",0,f[0]);printf("%d:%d\n",1,f[1]);for(i=2;i<N;i++){f[i]=f[i-1]+f[i-2];printf("%d:%d\n",i+1,f[i]);}}8.14 #include<stdio.h>#include<stdlib.h>#include<time.h>#define N 6000void main(){int a[N],i;int b1=0,b2=0,b3=0,b4=0,b5=0,b6=0;float p1,p2,p3,p4,p5,p6;srand(time(NULL));for(i=0;i<N;i++){a[i]=rand()%6+1;printf("%3d",a[i]);if(a[i]==1)b1++;if(a[i]==2)b2++;if(a[i]==3)b3++;if(a[i]==4)b4++;if(a[i]==5)b5++;if(a[i]==6)b6++;p1=(float)(b1/6000.0);p2=(float)(b2/6000.0);p3=(float)(b3/6000.0);p4=(float)(b4/6000.0);p5=(float)(b5/6000.0);p6=(float)(b6/6000.0);}printf("骰子出现1的概率：%.2f\n",p1);printf("骰子出现2的概率：%.2f\n",p2);printf("骰子出现3的概率：%.2f\n",p3);printf("骰子出现4的概率：%.2f\n",p4);printf("骰子出现5的概率：%.2f\n",p5);printf("骰子出现6的概率：%.2f\n",p6);}9.1(1) void Swap(int *x,int *y){int *pTemp;//*pTemp未进行初始化，*pTemp指向哪里位置*pTemp=*x;*x=*y;*y=*pTemp;}9.1(2) void Swap(int *x,int *y){int *pTemp;pTemp=x;x=y;y=pTemp;}//错误，x,y没有指向类型9.2 #include<stdio.h>int main(){int a[]={1,2,3,4,5};int *p=a;printf("%d,%d,%d,%d,%d,%d,%d\n",*p,*(++p),(*p)++,*p,*p--,--(*p),*p);return 0;}9.3 #include<stdio.h>void Swap(int *x,int *y);int main(){int a[6]={1,2,3,4,5,6},b[6]={11,22,33,44,55,66};int i;printf("Before Array \n");for(i=0;i<6;i++){printf(" %d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}for(i=0;i<6;i++){Swap(&a[i],&b[i]);}printf("After Array \n");for(i=0;i<6;i++){printf("%d\n",a[i]);}for(i=0;i<6;i++){printf("%d\n",b[i]);}return 0;}void Swap(int *x,int *y){int temp;temp=*x;*x=*y;*y=temp;}9.4 #include<stdio.h>#define N 10void FindMaxMin(int a[],int *pMaxa,int *pMaxnum,int *pMina,int *pMinnum);int main(){int a[N];int i,maxa,mina,maxnum,minnum;printf("Input a:");for(i=0;i<10;i++){scanf("%d",&a[i]);}FindMaxMin(a,&maxa,&maxnum,&mina,&minnum);printf("maxa=%d,maxnum=%d,mina=%d,minnum=%d\n",maxa,maxnum,mina,minnum);return 0;}void FindMaxMin(int a[],int *pMaxa,int *pMaxnum,int *pMina,int *pMinnum) {int i;*pMaxa=a[0];*pMina=a[0];*pMaxnum=0;*pMinnum=0;for(i=0;i<10;i++){if(a[i]>*pMaxa){*pMaxa=a[i];*pMaxnum=i;}else if(a[i]<*pMina){*pMina=a[i];*pMinnum=i;}}}10.1 void MYStrcpy(char *dstStr,const char *srcStr){while ((*dstStr++=*srcStr++)!='\0'){}}10.2 #include<stdio.h>main(){char *a="main(){char *a=% c% s% c; printf(a,34,a,34);}";printf(a,34,a,34);} 10.3(1) unsigned int MyStrlen(char *p)main(){unsigned int len;len=0;for(;*pa!='\0';pa++){len++;}return len;}10.3(2) unsigned int MyStrlen(char s[]){char *p=s;while(*p!='\0'){p++;}return (p-*p);}10.3(3) int MyStrcmp(char *p1,char *p2){for(;*p1==*p2;p1++,p2++){if(*p1=='\0') return -1;}return 1;}10.3(4) int MyStrcmp(char s[],char t[]){int i;for(i=0;s[i]==t[i];i++){if(s[i]=='\0') return 0;}return i;}10.3(5) #include<stdio.h>#include<string.h>int main(){char password[7]="secret";char userInput[81];printf("Input Password:");scanf("%s",userInput);if(strcmp(userInput,password)==0)printf("Coorrect password!Welcome to the system...\n");else if(strcmp(userInput,password)<0)printf("Invalid password!user input<password...\n");elseprintf("Invalid password!user input>password...\n");return 0;}10.4 #include<stdio.h>#define N 24unsigned int CountLetter(char str[]);int main(){char a[N];printf("Input a letter:\n");gets(a);printf("The length of the letter is:%d\n",CountLetter(a));return 0;}unsigned int CountLetter(char str[]){char *p=str;int c=0,flag=0;while(*p!='\0'){if(*p!=' ')flag=1;else if(flag==1){c++;flag=0;}p++;}return c+1;}12.1 #include<stdio.h>typedef struct data{int year;int month;int day;}DATA;typedef struct work{char a[14];char b[10];char c[6];}WORK;typedef struct student{char studentName[10];char studentSex;DATA birthday;WORK profession;}STUDENT;int main(){STUDENT stu={"王刚",'M',{1991,5,19},{"信息工程系","学习人员","学生"}};printf("stu:%2s%3c%6d/%02d/%02d%4s,%4s,%4s\n",stu.studentName,stu.studentSe x,stu.birthday.year,stu.birthday.month,stu.birthday.day,stu.profession.a,stu.profession.b,stu.profession.c);return 0;}12.4 #include<stdio.h>#include<string.h>#define N 10typedef struct people{char peopleName[10];}PEOPLE;int main(){int sum1=0,sum2=0,sum3=0,sum4=0;int i;char name[N][N];PEOPLE stu[5]={"zhang","li","wang"};printf("Enter their name:\n");for(i=0;i<10;i++){gets(name[i]);if(strcmp(name[i],stu[0].peopleName)==0)sum1++;else if(strcmp(name[i],stu[1].peopleName)==0) sum2++;else if(strcmp(name[i],stu[2].peopleName)==0) sum3++;elsesum4++;}printf("stu:%4s%2d\n",stu[i].peopleName,sum[j]); printf("stu:%4s%2d\n",stu[1].peopleName,sum2);printf("stu:%4s%2d\n",stu[2].peopleName,sum3);printf("%2d\n",sum4);return 0;}。

C语言程序设计苏小红版第五六单元答案

第五章#include<>void main(){double x;printf("请输入一个实数:\n");scanf("%lf",&x);if(x>0){printf("%f\n",x);}else{printf("%f\n",-x);}}#include <>main(){int a,b;printf("请输入一个整数:");scanf("%d",&a);b=a%2;if(b==0){printf("%d为偶数\n",a);}else{printf("%d为奇数\n",a);}}#include<>#include<>main(){float a,b,c,s,area;printf("请输入三边长:");scanf("%f,%f,%f",&a,&b,&c);s=(a+b+c)/2;area=(float)sqrt(s*(s-a)*(s-b)*(s-c));if((a+b>c)&&(a+c>b)&&(b+c>a)){printf("这个三角形的面积为%f\n",area);}else{printf("这三条边不能组成三角形\n");}}#include<>#include<>void main(){double a,b,c,d,e,x1,x2;printf("请输入a,b,c:");scanf("%lf,%lf,%lf",&a,&b,&c);if(a==0){printf("该方程不是一元二次方程.\n");}else if(b*b-4*a*c>0){d=sqrt(b*b-4*a*c);x1=(-b+d)/(2*a);x2=(-b-d)/(2*a);printf("x1=%f,x2=%f\n",x1,x2);}else if(b*b-4*a*c==0){x1=(-b)/(2*a);printf("x1=x2=%f\n",x1);}else if(b*b-4*a*c<0){printf("该方程没有实数解.\n");}}#include<>main(){int year,flag;printf("输入年份:");scanf("%d",&year);if(((year%4==0)&&(year%100!==0))||(year%400==0)){flag=1;}else{flag=0;}if(flag==1){printf("%d是闰年\n",year);}else{printf("%d不是闰年\n",year);}}#include<>void main(){int year,flag;printf("输入年份:");scanf("%d",&year);flag=(((year%4==0)&&(year%100!=0))||(year%400==0))?1:2;if(flag==1){printf("%d年是闰年\n",year);}else{printf("%d年不是闰年\n",year);}}#include<>main(){char ch;printf("请输入一个字母:");ch=getchar();if((ch>=65)&&(ch<=90)){ch=ch+32;printf("%c,%d\n",ch,ch);}else if((ch>=97)&&(ch<=122)){ch=ch-32;printf("%c,%d\n",ch,ch);}else{printf("%c\n",ch);}}#include<>main(){char ch;printf("请输入一个字符:");ch=getchar();if((ch>=48)&&(ch<=57)){printf("这是一个数字字符.\n");}else if((ch>=65)&&(ch<=90)){printf("这是一个大写字母.\n");}else if((ch>=97)&&(ch<=122)){printf("这是一个小写字母.\n");}else if(ch==32){printf("这是一个空格字符.\n");}else{printf("这是一个其它字符.\n");}}#include<>main(){int score,mark;printf("Please enter score:");scanf("%d",&score);if(score<0||score>100){printf("Input error!\n");}else if(score>=90&&score<=100){printf("%d--A\n",score);}else if(score>=80&&score<90){printf("%d--B\n",score);}else if(score>=70&&score<80){printf("%d--C\n",score);}else if(score>=60&&score<70){printf("%d--D\n",score);}else{printf("%d--E\n",score);}}#include <>#include <>main(){int flag, year,month,day,day1=31,day2=30,day3=29,day4=28;printf("请以2012,03这种形式输入某年某月:");scanf("%d,%d",&year,&month);if (month>12||month<1){printf("你输入的年份不在合法范围内\n");exit(0);}else{flag=(year%4==0 && year%100 !=0||year% 400 ==0)?1:0;switch (flag){case 1:printf("闰年");break;case 0:printf("平年");break;}if (month==2&&flag==1)day=day3;else if (month==2&&flag==0)day=day4;switch (month){case 1:case 3:case 5:case 7:case 8:case 10:case 12:printf("%d年,%d月拥有的天数是31. \n",year,month);break;case 4:case 6:case 9:case 11:printf("%d年,%d月拥有的天数是30. \n",year,month);break;default:printf("%d年,%d月拥有的天数是%d: \n",year,month,day);}}}本章实验题1#include<>main(){double faheight,maheight;char sex,sports,diet,F,M,Y,N;printf("请输入父母的身高:\n");scanf("%lf,%lf",&faheight,&maheight);printf("请输入孩子是男孩还是女孩(F/M):\n");scanf(" %c",&sex);printf("请输入孩子是否喜欢锻炼身体(Y/N):\n");scanf(" %c",&sports);printf("请输入孩子是否有良好的饮食习惯(Y/N):\n");scanf(" %c",&diet);if(sex==77&&sports==89&&diet==89){printf("该孩子成人时身高约为:%.2f.\n",(faheight+maheight)***;}else if(sex==77&&sports==89&&diet==78){printf("该孩子成人时身高约为:%.2f.\n",(faheight+maheight)**;}else if(sex==77&&sports==78&&diet==89){printf("该孩子成人时身高约为:%.2f.\n",(faheight+maheight)**;}else if(sex==77&&sports==78&&diet==78){printf("该孩子成人时身高约为:%.2f.\n",(faheight+maheight)*;}else if(sex==70&&sports==89&&diet==89){printf("该孩子成人时身高约为:%.2f.\n",(faheight*+maheight)/2**;}else if(sex==70&&sports==89&&diet==78){printf("该孩子成人时身高约为:%.2f.\n",(faheight*+maheight)/2*;}else if(sex==70&&sports==78&&diet==89){printf("该孩子成人时身高约为:%.2f.\n",(faheight*+maheight)/2*;}else if(sex==70&&sports==78&&diet==78){printf("该孩子成人时身高约为:%.2f.\n",(faheight*+maheight)/2);}}本章实验题2#include<>main(){double t,w,h;printf("请输入体重身高:\n");scanf("%lf,%lf",&w,&h);t=w/(h*h);if(t<18){printf("低体重.\n");}if(t>=18&&t<25){printf("正常体重.\n");}if(t>=25&&t<27){printf("超重体重.\n");}if(t>=27){printf("肥胖.\n");}}第六章(1)#include <>main(){int i,j,k;char space=' ';for (i=1;i<=4;i++){for (j=1;j<=i;j++){printf("%c",space);}for (k=1;k<=6;k++){printf("*");}printf("\n");}}(2)#include <>main(){int k=4,n;for (n=0;n<k;n++){if (n%2==0) continue;k--;}printf("k=%d\n,n=%d\n",k,n); }(3)#include <>main(){int k=4,n;for (n = 0;n < k;n++){if (n%2 ==0) break;k--;}printf("k=%d,n=%d\n",k,n); }(1)#include <>main(){int i,sum = 0;for (i=1;i<=101;i=i+2){sum=sum+i;}printf("sum = %d\n",sum); }(2)#include <>main(){long i;long term,sum = 0;for (i=1;i<=99;i=i+2){term=i*(i+1)*(i+2);sum=sum+term;}printf("sum =%ld\n",sum);}(3)#include <>main(){long term=0,sum=0;int a,i,n;printf("Input a,n:");scanf("%d,%d",&a,&n);for (i = 1;i<=n;i++){term = term * 10 + a;sum=sum+term;}printf("sum = %ld\n",sum); }(4)#include<>#include<>main(){int n = 1;float term = ,sign = 1,sum = 0;while (fabs(term) >= 1e-4){term = sign / n;sum = sum + term;sign = -sign;n++;}printf("sum = %f\n");}(5)#include<>#include<>main(){int n = 1,count = 1;float x;double sum,term;printf("Input x:");scanf("%f",&x);sum = x;term = x;do{term = -term*x*x/((n+1)*(n+2));sum = sum + term;n = n + 2;count++;}while (fabs(term)>=1e-5);printf("sin(x) = %f,coumt = %d \n",sum,count);}#include<>main(){int x=1,find=0;while (!find){if (x%2==1 && x%3==2 && x%5==4 && x%6==5 && x%7==0){find=1;}x++;}printf("x=%d\n",x-1);}#include<>main(){int i,n;long p,j;printf("Please enter n:");scanf("%d",&n);for (i=1;i<=n;i++){p=i*i;j=i*i*i;printf("%d * %d = %ld\n",i,i,p);printf("%d * %d * %d= %ld\n",i,i,i,j);}}#include<>main(){double C,F,i;for (F = -40;F <= 110;F = F + 10){C = (F-32)*5/9;printf("F=%f C=%f\n",F,C);}}#include<>main(){double p = 1 + *12,x4,x3,x2,benjin;x4 = 1000/p;x3 = (x4 + 1000)/p;x2 = (x3 + 1000)/p;benjin = (x2 + 1000)/p;printf("本金为:%f",benjin);}#include<>main(){double count = 0,c ,d , sum = 100;printf("Input c :");scanf("%lf",&c);d = c / ;do{sum = sum * (1+d);count++;}while (sum <= 200);printf("count = %f\n",count);}#include<>#include<>main(){int count = 1;double sum = ,term,n = ,i = ;do {term = -i/n;sum = sum + term;n = n + 2;i = -i;count++;}while (fabs(term) >= 1e-5);printf("∏= %lf,count = %d.\n",4 * sum,count); }#include <>#include <>main(){int count = 1;double sum = , term = , n = ;while (fabs(term) >= 1e-5){term = term / n;sum = sum + term;n++;count++;}printf("e = %lf,count = %d.\n",sum,count);}#include <>main(){int i , a , b , c ,d;for (i = 100 ; i <= 999 ; i++){a = i /100;c = i % 10;b = (i - a * 100 - c) / 10;d = a * a * a + b * b * b + c * c * c;if (i == d){printf("i = %d\n",i);}}}#include <>main(){long m = 2 , n ,term = 1 ,sum = 1;printf("Input n:");scanf("%ld",&n);do {term = term * m;sum = sum + term ;m++;}while(sum <= n);printf("m = %d.\n",m - 2);}#include <>main(){int num = 1,sum = 0 , count = 0;while (num > 0){printf("Input num :");scanf("%d",&num);sum = sum + num ;count++;}printf ("sum = %d,count = %d.\n",sum, count - 1); }#include <>main(){int term , sum = 0 , count = 0;do {begin:printf("Input term : ");scanf ("%d",&term);if (term > 0){sum = sum + term ;count++;}else if (term < 0)goto begin;elsegoto end ;}while (term != 0);end : printf ("sum = %d. count = %d.\n",sum,count );}#include <>main(){int a,b,c;for (a = 0;a < 17;a++)for (b = 0;b <= 25 ;b++){c = 30 - a - b ;if (a * 3 + b * 2 + c == 50)printf ("男= %d,女= %d,孩子= %d.\n",a,b,c);}}#include<>main(){int a,b;for (a = 0; a <=98 ; a++){b = 98 - a;if (a * 2 + b * 4 == 386){printf ("鸡有%d只,免有%d只.\n",a,b);}}}#include <>main(){int x,y,z;for (x = 0;x <= 20;x++){for (y = 0;y <= 33;y++){z = 100 - x - y;if (5 * x + 3 *y + z / == 100){printf ("x = %d,y = %d,z = %d\n",x, y, z);}}}不确定#include<>main(){int x, y, z;for (x = 1; x < 10; x++){for (y = 1; y < 20; y++){z = 50 - x - y;if (x * 10 + y * 5 + z == 100)printf("x = %d, y = %d, z = %d\n",x ,y ,z);}}}上：#include<>main(){int i, j;for (i = 1; i <= 9; i++){for (j = 1; j <= 9; j++){printf("%-5d",i * j);}printf("\n");}}左：#include<>main(){int i, j;for (i = 1; i <= 9; i++){for (j = 1; j <= i; j++){printf("%-5d",i * j);}printf("\n");}右：#include <>main(){int i, j, a = 1, k;char b = ' ';for (i = 1; i <= 9; i++){for (k = 1; k <= i; k++){printf("%5c",b);}for(j = i; j <= 9; j++){a=j * i;printf("%5d",a);}printf("\n");}}#include<>main(){long i,summo;double sumfu = 0,term = ;summo = 100000 * 30;for (i = 1;i <= 30;i++){term = term * ;sumfu = sumfu + term;}printf("陌生人付%ld,富翁付%lf.\n",summo,sumfu ); }本章实验题#include<>#include<>#include<>main(){int x1, x2, c, answer;begin:srand(time(NULL));x1 = rand() % 10 + 1;x2 = rand() % 10 + 1;c = x1 * x2;do {printf ("%d * %d = \n",x1, x2);scanf("%d",&answer);if (c == answer){printf("Right !\n");goto begin;}else{printf("Wrrong !Please try again.\n");}}while(c != answer);}#include<>#include<>#include<>main(){int x1, x2, c, answer, count = 0;begin:srand(time(NULL));x1 = rand() % 10 + 1;x2 = rand() % 10 + 1;c = x1 * x2;do {printf ("%d * %d = \n",x1, x2);scanf("%d",&answer);if (c == answer){printf("Right !\n");goto begin;}else{printf("Wrrong !Please try again.\n");count++;}}while((c != answer)&&(count <= 2));printf ("Wrong ! You have tried three times ! Test over !\n");}#include<>#include<>#include<>main(){int count1 = 0, count2 = 0;int x1, x2, c, answer ,i;for (i = 1;i <= 10; i++){srand(time(NULL));x1 = rand() % 10 + 1;x2 = rand() % 10 + 1;c = x1 * x2;printf ("%d * %d = \n",x1 , x2 );scanf("%d",&answer);if (c == answer){printf ("Right !\n");count1++;}else{printf ("Wrong !\n");count2++;}}printf ("你得了%d分.\n正确率为%d %%.\n",count1,count1 *10); }。

《C语言程序设计》(苏小红) 课后习题参考答案高等教育出版社

printf("y=%f\n",y);printf("z=%f\n",z);}3.1(1)main(){}3.1(2)main(){}3.2main(){int x,b0,b1,b2,s;printf("Inputx:");scanf("%d",&x);b2=x/100;b1=(x-b2*100)/10;//或(x%100)/10;或x/10%10;b0=x%10;s=b0*100+b1*10+b2;printf("s=%d\n",s);}3.3#include<stdio.h>#include<math.h>main(){float rate=0.0225;float n,capital,deposit;printf("Input n,capital:");scanf("%f,%f",&n,&capital);deposit=capital*pow(1+rate,n);printf("deposit=%f\n",deposit); }3.4main(){}习题44.1(1)main(){}4.1(2)main(){}4.1(3)main(){}4.2#include<stdio.h>main(){long a,b;float x,y;scanf("%d,%d\n",&a,&b);scanf("%f,%f\n",&x,&y);printf("a=%d,b=%d\n",a,b);printf("x=%f,b=%f\n",x,y); }5.1main(){{}{}}5.2main(){intscanf("%d", &a);if(a%2==0){printf("a是偶数");}else{printf("a是奇数");}}5.3#include<stdio.h>#include<math.h>main(){float a,b,c,s,area;printf("Input a, b, c:");scanf("%f %f %f", &a, &b, &c);if(a+b>c&&a+c>b&&b+c>a){s=(a+b+c)/2;area=(float)sqrt(s*(s-a)*(s-b)*(s-c));printf("area=%f\n",area);}{}}5.4main(){{}{}else if(b*b-4*a*c==0){x=-b/(2*a);y=-b/(2*a);printf("x=%f,y=%f\n",x,y);}else{printf("该方程无实根\n");}}5.5#include<stdio.h>main(){int year,flag;printf("Input a year:");scanf("%d",&year);if(year%4==0&&year%400!=0||year%400==0) {flag=1;}else{}{}{}}5.6main(){int{}else{printf("%d is not a leap year!\n",year);}}5.7#include<stdio.h>main(){char ch;printf("Inputch:");scanf("%c",&ch);if(ch>='a'&&ch<='z'){ch=getchar();ch=ch-32;printf("%c,%d\n",ch,ch);}else if(ch>='A'&&ch<='Z'){ch=getchar();ch=ch+32;printf("%c,%d\n",ch,ch);}{}}5.8#include<stdio.h>main(){char ch;printf("Inputch:");scanf("%c",&ch);if(ch>=48&&ch<=57){printf("ch是数字字符\n");grade=score/10;if(score<0||score>100){printf("Input error\n");}if(score>=90&&score<=100){printf("%d--A\n",score);}else if(score>=80&&score<90){printf("%d--B\n",score);}else if(score>=70&&score<80){printf("%d--C\n",score);}else if(score>=60&&score<70){printf("%d--D\n",score);}case3:case1:printf("31天\n");break;case11:case9:case6:case4:printf("30天\n");break;case2:if(year%4==0&&year!=0||year%400==0){printf("29天\n");}else{printf("28天\n");}break;main(){int k=4,n;for(n=0;n<k;n++){if(n%2==0)continue;k--;}printf("k=%d\n,n=%d\n",k,n);}6.1(3)#include<stdio.h>main(){int k=4,n;for(n=0;n<k;n++){if(n%2==0)break;k--;}printf("k=%d,n=%d\n",k,n);main(){int n=1;float term=1.0,sign=1,sum=0;while(term<=-1e-4||term>=1e-4){term=1.0/sign;sum=sum+term;sign=sign+n;n++;}printf("sum=%f\n",sum);}6.2(5)#include<stdio.h>#include<math.h>main(){int n=1,count=1;float x;}}/*int x,find=0;for(x=1;!find;x++){if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0){printf("x=%d\n",x);find=1;}}}*/6.4#include<stdio.h>main(){int i,n;long p=1,m=1;printf("Input n:");scanf("%d",&n);x=x*pow(1+c,12)-1000;n++;}while(x>0);printf("x=%d\n",x);}6.7#include<stdio.h>main(){int n=0;float a=100.0,c;printf("Inputc:");scanf("%f",&c);do{a=a*(1+c);n++;}while(a<=200);printf("n=%d\n",n);}term=term*(1.0/n);sum=sum+term;n++;count++;}printf("sum=%f,count=%d\n",sum,count); }6.10#include<stdio.h>#include<math.h>main(){int x;for(x=100;x<=999;x++){if(x==pow(x/100,3)+pow(x/10%10,3)+pow(x%10,3))printf("x=%d\n",x);}}{sum=sum+m;count++;}else{break;}printf("sum=%d,count=%d\n",sum,count);}}6.13#include<stdio.h>main(){int i,n,m,count=0,sum=0;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i++){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}6.15#include<stdio.h>main(){int x,y;for(x=0;x<=98;x++){y=98-x;2*x+4*y==386;if(x+y==98&&2*x+4*y==386){printf("x=%d,y=%d\n",x,y);}}}6.16#include<stdio.h>{10*x+5*y+z==100;z=50-x-y;if(10*x+5*y+z==100&&x+y+z==50&&z>0){printf("x=%d,y=%d,z=%d\n",x,y,z);}}}}7.1#include<stdio.h>int Square(int i){return i*i;}int main(){int i=0;i=Square(i);hour=0;}void display(){printf("%d,%d,%d\n",hour,minute,second); }void delay(){int t;for(t=0;t<100000000;t++);}int main(){int i;void updaye(),display(),delay();for(i=0;i<1000000;i++){update();int main(){int a,b;printf("Inputa,b:");scanf("%d,%d",&a,&b);printf("%d\n",LCM(a,b));return0;}int LCM(int n,int m){int x;int find=0;for(x=1;!find;x++){if(x%n==0&&x%m==0){find=1;}long Fact(int n);int main(){int m;long ret;printf("Inputm:");scanf("%d",&m);ret=Fact(m);printf("ret=%d\n",ret);return0;}long Fact(int n){int i;long result=1,sum=0;for(i=2;i<=n;i++){result*=i;sum=sum+result;find=1;}7.7(2)#include<stdio.h> int Gcd(int a,int b);int main(){int m,n;printf("Inputm,n:");scanf("%d,%d",&m,&n);printf("%d\n",Gcd(m,n));return0;}int Gcd(int a,int b){int r,temp;r=a%b;if(r==0)return b;else{b[j]=j;}}int main(){static int a[]={5,6,7,8},i;Func(a);for(i=0;i<4;i++){printf("%d",a[i]);}return0;}8.2(1)int PositiveNum(int a[],int n) {int i,count=0;for(i=0;i<n;i++){{if(a[n]>max){max=a[n];maxPos=n;}else if(a[n]<min){min=a[n];minPos=n;}}printf("max=%d,pos=%d\n",max,maxPos);printf("min=%d,pos=%d\n",min,minPos);return0;}8.3void DivArray(int*pArray,int n){int i;count++;}return count;}void ReadScore(int score[],int n){int i;printf("Input score:");for(i=0;i<n;i++){scanf("%d",&score[i]);}}8.5#include<stdio.h>#define N40int HighAver(int score[],int n);int ReadScore(int score[]);int main(){printf("Input score:");scanf("%d",&score[i]);}while(score[i]>=0);return i;}8.6#include<stdio.h>#define N40int ReadScore(int score[],long num[]); int FindMax(int score[],long num[],int n);int main(){int score[N],n,max,num,t;long num[N];t=FindMax(score,n);max=score[t];num=num[t];printf("max=%d,num=%d\n",max,num);return0;}int main(){int a[N],n;printf("%d\n",ChangeArry(a,n));return0;}int Read(int a[]){int i;for(i=0;i<9;i++){printf("Input a:");scanf("%d",&a[i]);return i;}int ChangeArry(int a[],int n){int max,min,i,maxpos,minpos,term;max=min=score[0];for(j=0;j<N;j++){scanf("%d",&a[i][j]);}}for(i=0;i<N;i++){for(j=0;j<N;j++){if(i==j||i+j==N-1)sum=sum+a[i][j];}}printf("对角线元素之和为：%d\n",sum); }8.11#include<stdio.h>#define N2#define M3void main()#define N7void YangHui(int a[N][N],int n);void main(){int i,j,n,b[N][N];printf("Input n:");scanf("%d",&n);YangHui(b,n);for(i=0;i<n;i++){for(j=0;j<=i;j++){printf("%4d",b[i][j]);}printf("\n");}}void YangHui(int a[N][N],int n){}8.14#include<stdio.h>#include<stdlib.h>#include<time.h>#define N6000void main(){int a[N],i;int b1=0,b2=0,b3=0,b4=0,b5=0,b6=0;float p1,p2,p3,p4,p5,p6;srand(time(NULL));for(i=0;i<N;i++){a[i]=rand()%6+1;printf("%3d",a[i]);if(a[i]==1)b1++;if(a[i]==2)b2++;*pTemp=*x;*x=*y;*y=*pTemp;}9.1(2)void Swap(int*x,int*y) {int*pTemp;pTemp=x;x=y;y=pTemp;}//错误，x,y没有指向类型9.2#include<stdio.h>int main(){int a[]={1,2,3,4,5};int*p=a;printf("%d,%d,%d,%d,%d,%d,%d\n",*p,*(++p),(*p)++,*p,*p--,--(*p),*p);return0;for(i=0;i<6;i++){printf("%d\n",b[i]);}return0;}void Swap(int*x,int*y){int temp;temp=*x;*x=*y;*y=temp;}9.4#include<stdio.h>#define N10void FindMaxMin(int a[],int*pMaxa,int*pMaxnum,int*pMina,int*pMinnum); int main(){int a[N];{*pMina=a[i];*pMinnum=i;}}}10.1void MYStrcpy(char*dstStr,const char*srcStr){while((*dstStr++=*srcStr++)!='\0'){}}10.2#include<stdio.h>main(){char*a="main(){char*a=%c%s%c;printf(a,34,a,34);}";printf(a,34,a,34);} 10.3(1)unsigned int MyStrlen(char*p)main(){unsigned int len;{int i;for(i=0;s[i]==t[i];i++){if(s[i]=='\0')return0;}return i;}10.3(5)#include<stdio.h>#include<string.h>int main(){char password[7]="secret";char userInput[81];printf("Input Password:");scanf("%s",userInput);if(strcmp(userInput,password)==0)printf("Coorrect password!Welcome to the system...\n");else if(strcmp(userInput,password)<0){c++;flag=0;}p++;}return c+1;}12.1#include<stdio.h>typedef struct data{int year;int month;int day;}DATA;typedef struct work{char a[14];char b[10];int sum1=0,sum2=0,sum3=0,sum4=0;int i;char name[N][N];PEOPLE stu[5]={"zhang","li","wang"};printf("Enter their name:\n");for(i=0;i<10;i++){gets(name[i]);if(strcmp(name[i],stu[0].peopleName)==0) sum1++;else if(strcmp(name[i],stu[1].peopleName)==0) sum2++;else if(strcmp(name[i],stu[2].peopleName)==0) sum3++;elsesum4++;}printf("stu:%4s%2d\n",stu[i].peopleName,sum[j]);。

1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。

【最新大学期末考试题库答案】上海海事大学(C语言期末)上机题库(2)

页数:13
大学c语言考试题库含答案

页数:61
c语言期中考试试题及答案

页数:11
大学C语言考试试题

页数:5
大学C语言考试试题及答案

页数:98
大学C语言期末考试习题集(带详解答案)

页数:56
大学C语言期末考试练习题(带详解答案)

页数:55
大一c语言考试试题

页数:6
大学C语言考试题库及答案

页数:100
兰州理工大学c语言题库81058115

页数:5

C语言大学实用教程+参考答案_苏小红

合集下载

c语言苏小红第五版第12章实验题答案

《C语言程序设计》(苏小红)课后习题答案高等教育出版社

C语言苏小红版第六章习题答案

C语言程序设计苏小红版第五六单元答案

《C语言程序设计》(苏小红)课后习题答案高等教育出版社.docx

《C语言程序设计》(苏小红)-课后习题答案-高等教育出版社

最新《C语言程序设计》(苏小红) 课后习题答案高等教育出版社资料

C语言程序的设计苏小红版答案

C语言程序设计苏小红版第五六单元答案

《C语言程序设计》(苏小红) 课后习题参考答案高等教育出版社

文档推荐

最新文档

C语言大学实用教程+参考答案_苏小红

合集下载

c语言 苏小红 第五版 第12章实验题答案

《C语言程序设计》(苏小红)课后习题答案高等教育出版社

C语言苏小红版第六章习题答案

C语言程序设计 苏小红版 第五六单元 答案

《C语言程序设计》(苏小红)课后习题答案高等教育出版社.docx

《C语言程序设计》(苏小红)-课后习题答案-高等教育出版社

最新《C语言程序设计》(苏小红) 课后习题答案 高等教育出版社资料

C语言程序的设计苏小红版答案

C语言程序设计苏小红版第五六单元答案

《C语言程序设计》(苏小红) 课后习题参考答案 高等教育出版社

文档推荐

最新文档

c语言苏小红第五版第12章实验题答案

C语言程序设计苏小红版第五六单元答案

最新《C语言程序设计》(苏小红) 课后习题答案高等教育出版社资料

《C语言程序设计》(苏小红) 课后习题参考答案高等教育出版社