?? pgm0a_08.cpp
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//// This file contains the C++ code from Program A.8 of// "Data Structures and Algorithms// with Object-Oriented Design Patterns in C++"// by Bruno R. Preiss.//// Copyright (c) 1998 by Bruno R. Preiss, P.Eng. All rights reserved.//// http://www.pads.uwaterloo.ca/Bruno.Preiss/books/opus4/programs/pgm0A_08.cpp//class Point{ int x; int y;public: Point (int, int); // ...};class GraphicalObject{protected: Point center; GraphicalObject (Point const& p) : center (p) {}public: virtual ~GraphicalObject (); virtual void Draw () const = 0; virtual void Erase () const; virtual void MoveTo (Point const&);};
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