point.h

it is a usefull thing

//=====================================
// point.h
//=====================================
#ifndef HEADER_POINT
#define HEADER_POINT
#include<iostream>
using namespace std;
//-------------------------------------
class Point{
  int x, y;
public:
  void set(int a, int b);
  Point operator+(const Point& d);
  friend ostream& operator<<(ostream& o, const Point& d);
};//===================================
inline ostream& operator<<(ostream& o, const Point& d){
  return o<<'('<<d.x<<','<<d.y<<')'<<'\n';
}//------------------------------------
#endif  // HEADER_POINT