实验1

#include<stdio.h>
int main(void)
{
    int n,i;
    double r,h,v;
    
    double cylinder(double r,double h);
    
    printf("Enter n");
    scanf("%d",&n);
     for(i=1;i<=n;i++){
        printf("Enter rand h：");
        scanf("%lf%lf",&r,&h);

        if((r<=0)||(h<=0)){
        
            printf("you are worry.");
        }
        else{
            v=cylinder(r,h);
            printf("v=%.3f
",v);
        }
     }
    
return 0;
}
double cylinder(double r,double h)
{
	double v;
    v = 3.14*r*r*h;
    return v;

}