integer.h

来自「Thinking in C++ 2nd edition source code 」· C头文件 代码 · 共 36 行

//: C16:Integer.h
// From Thinking in C++, 2nd Edition
// at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// An int wrapped in a class
#ifndef INTEGER_H_
#define INTEGER_H_
#include <iostream>

class Integer {
  int i;
public:
  // Guaranteed zeroing:
  Integer(int ii = 0) : i(ii) {}
  operator int() const { return i; }
  const Integer& operator++() {
    i++;
    return *this;
  }
  const Integer operator++(int) {
    Integer returnval(i);
    i++;
    return returnval;
  }
  Integer& operator+=(const Integer& x) {
    i += x.i;
    return *this;
  }
  friend std::ostream&
  operator<<(std::ostream& os, const Integer& x){
      return os << x.i;
  }
};
#endif // INTEGER_H_ ///:~