?? pgm12_11.cpp
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//// This file contains the C++ code from Program 12.11 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/pgm12_11.cpp//MultisetAsArray::MultisetAsArray (unsigned int n) : Multiset (n), array (n){ for (unsigned int item = 0; item < universeSize; ++item) array [item] = 0;}void MultisetAsArray::Insert (Object& object){ unsigned int const item = dynamic_cast<Element&> (object); ++array [item];}void MultisetAsArray::Withdraw (Object& object){ unsigned int const item = dynamic_cast<Element&> (object); if (array [item] > 0) --array [item];}bool MultisetAsArray::IsMember (Object const& object) const{ unsigned int const item = dynamic_cast<Element const&> (object); return array [item] > 0;}
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