?? pgm11_21.cpp
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//// This file contains the C++ code from Program 11.21 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/pgm11_21.cpp//typedef double time;class Event : public Association{public: enum type { arrival, departure }; typedef Wrapper<type> Type; typedef Wrapper<time> Time; Event (type typ, time tim) : Association (*new Time (tim), *new Type (typ)) {} Time& Key () const { return dynamic_cast<Time&> (Association::Key ()); } Type& Value () const { return dynamic_cast<Type&> (Association::Value()); }};
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