////   This file contains the C++ code from Program 13.1 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_01.cpp//class StoragePool{public:    virtual ~StoragePool ();    virtual void* Acquire (size_t) = 0;    virtual void Release (void*) = 0;};