useful.h

Think in C++ 第二版源码

//: C14:Useful.h
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// A class to reuse
#ifndef USEFUL_H
#define USEFUL_H

class X {
  int i;
public:
  X() { i = 0; }
  void set(int ii) { i = ii; }
  int read() const { return i; }
  int permute() { return i = i * 47; }
};
#endif // USEFUL_H ///:~