#include<iostream>
using namespace std;
//global varaibles
double pie = 3.14;
double r,h, volume;

//user defined function
void getvalues(){
    cout<<"Enter Radius";
    cin>>r;
    cout<<"Enter Height";
    cin>>h;
}
void compute(){
    volume= pie*(r*r)*h;
}
void display(){
    cout<<volume;
}
// int main to call the other funtions
int main(){
    getvalues();
    compute();
    display();
}