#include <iostream>

using namespace std;

int main()
{
	float	diameter, height, volume, radius;
	const float pi=3.14159;

	cout << "What is the diameter of the cone: ";
	cin >> diameter;
	cout << "What is the height? ";
	cin >> height;

	radius = diameter/2.0;
	volume = (1.0/3.0)*pi*(radius*radius)*height;

	cout << "The volume of the cone is " << volume << endl;
}