C语言程序设计实验指导(颜晖_主编)高等教育出版社

C语言程序设计部分实验参考答案

实验2

#include <stdio.h>

int main(){//2-1-2

int c,f=150;

c=f*5/9-32*5/9;

printf("fahr=%d, celsius=%d\n",f, c);

return 0;

}

#include <stdio.h>

int main(){//2-1-3

int c=26,f;

f=c*9/5+32;

printf("celsius=%d, fahr=%d\n",c, f);

return 0;

}

#include <stdio.h>

int main(){//2-1-4

int math=87,eng=72,comp=93;

printf("math=%d, eng=%d, comp=%d, average=%d\n",math, eng, comp, (math+eng+comp)/3);

return 0;

}

#include <stdio.h>

int main(){//2-1/5

int n=152,a,b,c;

c=n%10;

b=(n/10)%10;

a=n/100;

printf("整数%d 的个位数字是%d, 十位数字是%d, 百位数字是%d\n",n, c, b, a);

return 0;

}

#include <stdio.h>

int main(){//2-1-6

int x=3,y;

y=x*x;

printf("%d=%d*%d\n",y,x,x);

printf("%d*%d=%d\n",x,x,y);

return 0;

}

#include <stdio.h>

int main(){//2-2-1

double x, y;

printf("Enter x:");

scanf_s("%lf",&x);

if(x!=0){

y=1/x;

}else{

y=0;

}

printf("f(%.2f)=%.1f\n",x,y);

return 0;

}

#include <stdio.h>

int main(){//2-2-2

int celsius, fahr;

fahr=100;

celsius=5*(fahr-32)/9;

printf("fahr=%d, celsius=%d\n",fahr,celsius); return 0;

}

#include <stdio.h>

int main(){//2-2-3

double money, rate,x=1.0;

int i,year;

printf("Enter money, year and rate:"); scanf("%lf %d %lf",&money,&year,&rate); for(i=1;i<=year;i++)

x=x*(1+rate);

printf("intrest=%.2f\n",money*x-money); return 0;

}

#include <stdio.h>

#include<math.h>

int main(){//2-2-4

double x, y;

printf("Enter x");

scanf_s("%lf",&x);

if(x<0.0)

y=pow(x+1,2)+2*x+1/x;

else

y=sqrt(x);

printf("f(%.2f)=%.2f\n",x,y);

return 0;

}

#include <stdio.h>

#include<math.h>

int main(){//2-2-5

double x, y;

printf("Enter x:");

scanf_s("%lf",&x);

if(x==10)

y=1/x;

else

y=x;

printf("f(%.2f)=%.1f\n",x,y); return 0;

}

#include <stdio.h>

int main(){//2-2-6

int x, y;

printf("Enter num1:"); scanf_s("%d",&x);

printf("Enter num2:"); scanf_s("%d",&y);

printf("%d+%d=%d\n",x,y,x+y); printf("%d-%d=%d\n",x,y,x-y); printf("%d*%d=%d\n",x,y,x*y); printf("%d/%d=%d\n",x,y,x/y); printf("%d%%d=%d\n",x,y,x%y); return 0;

}

#include <stdio.h>

int main(){//2-3-1

int i,sum=0;

for(i=1;i<=100;i++){ sum=sum+i;

}

printf("sum=%d\n",sum); return 0;

}

#include <stdio.h>

int main(){//2-3-2

int i,m,s=0;

printf("Enter m:");

scanf("%d",&m);

for(i=m;i<=100;i++)

s=s+i;

printf("sum=%d\n",s); return 0;

}

#include <stdio.h>

int main(){//2-3-3

int i,m,n;

double s=0.0;

printf("Enter m:"); scanf("%d",&m);

printf("Enter n:"); scanf("%d",&n);

for(i=m;i<=n;i++)

s=s+1.0/i;

printf("sum=%f\n",s); return 0;

}

#include <stdio.h>

int main(){//2-3-4

int i,n;

double s=0.0;

printf("Enter n:"); scanf("%d",&n);

for(i=1;i<=n;i++)

s=s+1.0/(2*i-1); printf("sum=%f\n",s); return 0;

}

#include <stdio.h>

int main(){//2-3-5

int i,n;

double s=1.0,t=1.0,sign=1.0; printf("Enter n:"); scanf("%d",&n);

for(i=1;i<n;i++){

sign=-sign;

t=(t+3);

s=s+1/t*sign;

}

printf("sum=%.3f\n",s); return 0;

}

#include <stdio.h>

int main(){//2-3-6

int low, uper;

double fahr,celsius; printf("Enter low:"); scanf_s("%d",&low);

printf("Enter uper:");

scanf_s("%d",&uper);

printf("fahr celsius\n");

for(fahr=low;fahr<=uper;fahr+=2){ celsius=5.0/9.0*(fahr-32.0);

printf("%3.0f %6.1f\n",fahr,celsius); }

return 0;

}

#include <stdio.h>

int main(){//2-3-7

int m, n, i;

double p,sum=0.0;

printf("Enter m:");

scanf("%d",&m);

printf("Enter n:");

scanf("%d",&n);

p=1.0;

for(i=1;i<=m;i++)

p=p*i;

sum=sum+p;

p=1.0;

for(i=1;i<=n;i++)

p=p*i;

sum=sum+p;

printf("sum=%.0f\n",sum);

return 0;

}

#include <stdio.h>

int main(){//2-3-8

int x, n,i;

double p=1.0;

printf("Enter x:");

scanf("%d",&x);

printf("Enter n:");

scanf("%d",&n);

for(i=1;i<=n;i++)

p=p*x;

printf("%d的%d次方是%.0f\n",x, n,p); return 0;

}

#include <stdio.h>

#include<math.h>

int main(){//2-4-1