实验2

#include<stdio.h>
int main()
{
    int n,i;
    double r,h,v;
    double cylinder(double r,double h);
    v=cylinder(r,h);
    printf("输入n=");
    scanf("%d",&n);
    for(i=1;i<=n;i++){
         printf("输入h,r=");
         scanf("%lf%lf",&h,&r);
         
         if((r<=0)||(h<=0)){
             printf("输入错误\n");
         }
         else {
             v=3.14*r*r*h;
             printf("v=%.3f\n",v);
         }
    }
    return 0;
}
    double  cylinder(double r,double h)
    {
        double result;

        result=3.14*r*r*h;

        return result;
    }