point.h

// A little class that does some 2d Point arithmetic
#ifndef POINT_H
#define POINT_H

#include <iostream>

class Point {
public:
  //overloaded constructors!
  Point();
  Point(double _x, double _y);
  
  //overloaded methods for accessing x and y
  double x();
  void x(double val);
  double y();
  void y(double val);

  //overloaded addition and subtraction operators
  Point operator+(Point &rhs);
  Point &operator+=(Point &rhs);
  Point operator-(Point &rhs);
  Point &operator-=(Point &rhs);

private:
  //private attributes of the class
  double _x;
  double _y;
};


//insertion operator (NOTE: This is not a member.)
std::ostream& operator<<(std::ostream &os, Point &rhs);
#endif