/*
 * This program computes the volume of a sphere
 * Input: The radius of the sphere.
 * Output: The volume of the sphere.
 *
 */

#include <iostream.h>
#include <math.h>

double compute_volume(double radius);

int main(void)
{
	const double Pi = 3.14159;  // Mathematical constant
	double radius;
	double volume;

	cout << "\n Please enter the radius of the sphere:";

	cin >> radius;

	volume = compute_volume(radius);

	cout << "\nvolume = " << volume << "\n\n";

	exit(0);
}

double compute_volume(double radius)
{
	double volume;

	volume = 4.0 * Pi * pow(radius, 3.0) / 3.0;

	return(volume);
}