?? pgm06_19.cpp
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//// This file contains the C++ code from Program 6.19 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/pgm06_19.cpp//Object& QueueAsLinkedList::Head () const{ if (count == 0) throw domain_error ("queue is empty"); return *list.First ();}void QueueAsLinkedList::Enqueue (Object& object){ list.Append (&object); ++count;}Object& QueueAsLinkedList::Dequeue (){ if (count == 0) throw domain_error ("queue is empty"); Object& result = *list.First (); list.Extract (&result); --count; return result;}
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