实验三——2

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

	for(i=1;i<=n;i++){
	printf("Enter h:");
	scanf("%lf",&h);
	printf("Enter r:");
	scanf("%lf",&r);
	
	if(r<=0||h<=0){
		printf("输入错误,重新输入");
	}
	
	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;
	}