point.cpp

 #include "point.h"


Point::Point()
{
  this->_x = this->_y = 0;
}

Point::Point(double _x, double _y)
{
  this->_x = _x;
  this->_y = _y;
}
  
//overloaded methods for accessing x and y
double
Point::x()
{
  return _x;
}

void
Point::x(double val)
{
  _x = val;
}

double
Point::y()
{
  return _y;
}

void
Point::y(double val)
{
  _y = val;
}


//overloaded addition and subtraction operators
Point
Point::operator+(Point &rhs)
{
  Point result;

  result._x = _x + rhs._x;
  result._y = _y + rhs._y;

  return result;
}

Point &
Point::operator+=(Point &rhs)
{
  _x +=  rhs._x;
  _y +=  rhs._y;

  return *this;  //return a reference to me
}

Point
Point::operator-(Point &rhs)
{
  Point result;

  result._x = _x - rhs._x;
  result._y = _y - rhs._y;

  return result;

}

Point &
Point::operator-=(Point &rhs)
{
  _x -=  rhs._x;
  _y -=  rhs._y;

  return *this;  //return a reference to me
}


std::ostream &
operator<<(std::ostream &os, Point &rhs)
{
  //write to the stream
  os << "(" << rhs.x() << ", " << rhs.y() << ")";

  //return the stream
  return os;
}