课堂作业2

#include<stdio.h>
int main()
{
int i,n;
double r,h,radius,height,volume;
double cylinder(double r,double h);
printf("Enter n:");
scanf("%d",&n);

for(i=1;i<=n;i++){
printf("Enter r and h:");
scanf("%lf%lf",&r,&h);

if((r<=0)||(h<=0)){
printf("输入错误，重新输入\n");
}
else{
volume=cylinder(r,h);
printf("Volume=%.3f\n",volume);
}
}

return 0;
}

double cylinder(double r,double h)
{
double result;

result=3.1415926*r*r*h;

return result;
}