// ex15_04.cpp
// Inline function that calculates the volume of a sphere
#include <iostream>

using std::cout;
using std::cin;
using std::endl;

#include <cmath>

const double PI = 3.14159;

inline double sphereVolume( const double r ) 
   { return 4.0 / 3.0 * PI * pow( r, 3 ); }

int main()
{
   double radius;

   cout << "Enter the length of the radius of your sphere: ";
   cin >> radius;
   cout << "Volume of sphere with radius " << radius << 
           " is " << sphereVolume( radius ) << endl;
   return 0;
} // end function main


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