void swap(int& y, int& x)
{
     cout << "Results before swap" << endl << "y: " << y << "   x: " << x << endl;

     int temp;
	 temp = y;
   	 y = x;
 	 x = temp;

     cout << "Results after swap" << endl << "y: " << y << "   x: " << x << endl;
}