////   This file contains the C++ code from Program 13.8 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/pgm13_08.cpp//DoublyLinkedPool::DoublyLinkedPool (size_t n) :    numberOfBlocks ((n + sizeof (Block) - 1U) / sizeof (Block)),    pool (new Block [numberOfBlocks + 1]),    sentinel (pool [numberOfBlocks]){    sentinel.status = reserved;    sentinel.link.next = &sentinel;    sentinel.link.prev = &sentinel;    Block& head = pool [0];    head.status = free;    head.length = numberOfBlocks;    InsertAfter (sentinel, head);}DoublyLinkedPool::~DoublyLinkedPool ()    { delete [] pool; }