7. Adding functions to classes

• 
  // main.cpp
  class Point {
  public:
       // member variables
      int x;
      int y;
  
      // member functions
      void adjust( int xx, int yy )
      {
          x += xx;
          y += yy;
      }
  }; // don't forget this semicolon!
  
  int main()
  {
      // Create object 
      Point pt;
      // access to member variables
      pt.x = 5;
      pt.y = 4;
      pt.adjust( 1, 1 ); // member function call
      return 0;
  }