// CS2 Chung, testing automatic assignment op. and copy constructor
#include <iostream.h>
class Point
{
   private:
      double x;
      double y;
   public:
      Point() { x = 0; y = 0; }
      Point(double init_x, double init_y)
      {  x = init_x;
         y = init_y;
      }

      friend void operator >> (istream& ins, Point& target)
      {
         cout << "Enter x and y for a point: ";
         ins >> target.x >> target.y;
      }
      friend void operator << (ostream& outs, Point& source)
      {
         outs << "(" << source.x << ", ";
         outs << source.y << ")" << endl;
      }
};

void main()
{
   Point p1;
   cin >> p1;
   Point p2;
   cin >> p2;
   p1 = p2;      // automatic assignment op, both existed before.
   cout << p1;
   cout << p2;
   Point p3(p2); // copy constructor, p3 is created and copied
   cout << p3;
}