// Fig. 3.3: fig03_03.cpp
// Creating and using a programmer-defined function.
#include <iostream>
     
using std::cout;
using std::endl;
     
int square( int );   // function prototype
     
int main()
{
  // loop 10 times and calculate and output 
  // square of x each time
  for ( int x = 1; x <= 10; x++ )  
    cout << square( x ) << "  ";  // function call
    
  cout << endl;
    
  return 0;  // indicates successful termination
    
} // end main
    
int square( int y )  // y is a copy of argument to function
{                                                          
  return y * y;     // returns square of y as an int      
                                                               
} // end function square