10-14-2

#include<stdio.h>
int main()
{
    int i,n;
    double R,V,H;
    double volume(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("Enter wrong!");
        }
        else{
            V=volume(R,H);
            printf("V=%.3f
",V);
        }
    }

    return 0;
}
double volume(double R,double H)
{
    double result;
    
    result=3.14*R*R*H;
    
    return result;
}