point.h

#ifndef POINT_H
#define POINT_H

#include<iostream>

class Point
{
    const int x;
    const int y;
public:
    Point(int, int);
    friend std::ostream& operator<< (std::ostream& s, const Point& p);
    friend Point& operator- (const Point& p1, const Point& p2);
};

#endif