////   This file contains the C++ code from Program 12.1 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/pgm12_01.cpp//class Set : public virtual SearchableContainer{protected:    unsigned int universeSize;public:    Set (unsigned int n) : universeSize (n) {}    typedef Wrapper<unsigned int> Element;};