////   This file contains the C++ code from Program 4.1 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/pgm04_01.cpp//template <class T>class Array{protected:    T* data;    unsigned int base;    unsigned int length;public:    Array ();    Array (unsigned int, unsigned int = 0);    ~Array ();    Array (Array const&);    Array& operator = (Array const&);    T const& operator [] (unsigned int) const;    T& operator [] (unsigned int);    T const* Data () const;    unsigned int Base () const;    unsigned int Length () const;    void SetBase (unsigned int);    void SetLength (unsigned int);};