C语言程序设计 (何钦铭 颜晖 著) 第二章 课后答案.doc

练习 2－8#include void main(){float fahr,celsius;scanf("%f",&fahr);celsius=5.0/9*(fahr-32);printf("fahr=%f,celsius=%f\n",fahr,celsius);}练习 2－9#include void main(){int a,b,c;float avg;scanf("%d%d%d",&a,&b,&c);avg=(a+b+c)/3.0;printf("a=%d,b=%d,c=%d,avg=%f\n",a,b,c,avg);}练习 2－10#include void main(){float x,y;scanf("%f",&x);if(x==0)y=0;else y=1/x;printf("x=%.3f,y=%.3f\n",x,y);}练习 2－11#include #include void main(){float x,y;scanf("%f",&x);if(x>=0)y=sqrt(x);else y=pow(x,5)+2*x+1/x;printf("x=%.2f,y=%.2f\n",x,y);J}练习 2－12#include void main(){int lower,upper,fahr;float celsius;scanf("%d%d",&lower,&upper);printf("fahr----celsius\n");for(fahr=lower;fahrvoid main(){int n,i;float sum=0;scanf("%d",&n);for(i=1;ivoid main(){int n,i;float sum=0;scanf("%d",&n);for(i=1;ivoid main()J{int n,i;float sum=0.0,flag=1.0,d=1.0;scanf("%d",&n);for(i=1;ivoid main(){int m,n,i;double sum=0.0,product=1.0;scanf("%d%d",&m,&n);for(i=1;i#include void main(){int n,i;scanf("%d",&n);for(i=0;idouble fact(int n);void main(){int i,n;Jscanf("%d",&n);for(i=1;idouble fact(int n);void main(){int m,n;scanf("%d%d",&m,&n);printf("%5d%5d%10.2f\n",m,n,fact(n)/(fact(m)*fact(n-m)));}double fact(int n){int i;double product=1.0;for(i=1;ivoid main(){int num1,num2;scanf("%d%d",&num1,&num2);printf("%d+%d=%d\n",num1,num2,num1+num2);printf("%d-%d=%d\n",num1,num2,num1-num2);printf("%d*%d=%d\n",num1,num2,num1*num2);printf("%d/%d=%d\n",num1,num2,num1/num2);printf("%d mod %d=%d\n",num1,num2,num1%num2);}习题 2－3#include Jvoid main(){float x,pow=1.0;int i,n;scanf("%f%d",&x,&n);for(i=1;ivoid main(){int m,n,i;float sum=0;scanf("%d%d",&m,&n);for(i=m;ivoid main(){int n,i;float sum=0,flag=1.0;scanf("%d",&n);for(i=1;i#include void main(){int year;double loan,rate,money;scanf("%f%f",&loan,&rate);for(year=5;year#include void main(){int n,i;float sum=0;scanf("%d",&n);for(i=1;idouble fact(int n);void main(){int n,i;double sum=0;scanf("%d",&n);for(i=1;i<=n;i++)sum=sum+fact(i);printf("sum=%lf\n",sum);}double fact(int n){double product=1;int i;for(i=1;i<=n;i++)product=product*i;return product;}J。