#include<stdio.h>
main()
{
    float radius,height,vol;
    float volume(float,float);
    printf("Please input the radius and height:\n");
    scanf(%f %f,&radius,&height);
    vol=volume(radius,height);
    prinf("volume=%f\n",vol);
}
float volume(float r,float h)
{
    float temp;
    float pi=3.1415926;
    temp=pi*r*r*h;
    return temp;
}