#ifndef POINT_GUARD
#define POINT_GUARD

//typedef void (*Callback)(void*,void*);

namespace Graph_lib {

   struct Point {
      int x,y;
      Point(int xx, int yy) : x{xx}, y{yy} { }
      Point() :x{0}, y{0} { }

      Point& operator+=(Point d) { x+=d.x; y+=d.y; return *this; }
   };

   inline bool operator==(Point a, Point b) { return a.x==b.x && a.y==b.y; }

   inline bool operator!=(Point a, Point b) { return !(a==b); }


}
#endif