// Fig. 6.18: fig06_18.cpp
// Using an inline function to calculate the volume of a cube.
#include <iostream>
using std::cout;
using std::cin;
using std::endl;

// Definition of inline function cube. Definition of function appears 
// before function is called, so a function prototype is not required. 
// First line of function definition acts as the prototype.
inline double cube( const double side ) 
{ 
   return side * side * side; // calculate cube
} // end function cube

int main()
{
   double sideValue; // stores value entered by user 
   cout << "Enter the side length of your cube: ";
   cin >> sideValue; // read value from user

   // calculate cube of sideValue and display result
   cout << "Volume of cube with side " 
      << sideValue << " is " << cube( sideValue ) << endl;
   return 0; // indicates successful termination
} // end main


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