pgm05_01.cpp

此文件为网络书籍数据结构的面向对象方法的源码

//
//   This file contains the C++ code from Program 5.1 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/pgm05_01.cpp
//
class Object
{
protected:
    virtual int CompareTo (Object const&) const = 0;
public:
    virtual ~Object ();
    virtual bool IsNull () const;
    virtual int Compare (Object const&) const;
    virtual HashValue Hash () const = 0;
    virtual void Put (ostream&) const = 0;
};