22. Copy constructor example

• How are copy constructors defined ?

  
  // point.h
  class Point
  {
      public:
          // copy constructor
          Point( Point& other );
      private:
          int m_x;
          int m_y;
  };
  
  // point.cpp
  Point::Point( Point& other )
  {
      m_x = other.m_x;
      m_y = other.m_y;
  }