5. Default constructors

• How are constructors defined ?

  
      // point.h
      class Point
      {
          public:
              Point();
          private:
              int m_x;
              int m_y;
      };
  
      // point.cpp
      // Default constructor is the one with no arguments:
      Point::Point()
      {
          m_x = 0;
          m_y = 0;
      }