text: #include "Point.h"
  
  Point Point::operator+ (const Point& rhs) const{
      return Point(x + rhs.x, y + rhs.y);
  }
  
  Point Point::operator- (const Point &rhs) const{
      return Point(x - rhs.x, y - rhs.y);
  }
  
  std::ostream& operator<< (std::ostream& os, const Point& p){
      os << '(' << p.x << ',' << p.y << ')' << std::endl;
      return os;
  }
  
  std::istream& operator>> (std::istream& is, Point& p){
      is >> p.x >> p.y;
      return is;
  }