yujian.cpp

来自「关于数据结构的各章节的c原代码实现」· C++ 代码 · 共 62 行

// yujian.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"


#include <iostream>
using namespace std;

class Integer
{
private:
	int i;
public:
	Integer(int ii):i(ii){}
	const Integer
		operator+(const Integer& rv) const
	{
		cout <<"operator+" <<endl;
		return Integer(i+rv.i);
	}
	
	Integer&
		operator+=(const Integer& rv)
	{
		cout <<"operator+=" <<endl;
		i+=rv.i;
		return *this;
	}
	friend ostream&		
		operator<<(ostream & out,Integer& rv);
	//{
	//	out << rv.i;
	//	return out;
	//}
};

ostream&	operator<<(ostream& out,Integer& rv) 
{
	out << rv.i;
	return out;
}


void main()
{
	cout <<"built-in types:" <<endl;
	int i=1;
	int j=2;
	int k=3;
	
	k=i+j;
	cout <<"user-defined types:" <<endl;
	Integer ii(1);
	Integer jj(2);
	Integer kk(3);
	
	kk+=ii+jj;
	cout <<"kk is:" <<kk <<endl;
	
}