递增运算符重载

//递增运算符重载
#include<iostream>
using namespace std;
class MyInteger
{
	friend ostream& operator<<(ostream& cout, const MyInteger &myint);
public:
	MyInteger()
	{
		m_num = 0;
	}
	//前置++
	MyInteger& operator++()
	{
		//先++
		m_num++;
		//再返回
		return *this;
	}
	//后置++，括号内加int 表示占位符后置++
	MyInteger operator++(int)
	{
		//先返回
		MyInteger temp = *this;//记录当前本身的值，然后让本身的值加1，但返回的是以前的值，达到先返回后++;
		m_num++;
		return temp;
	}
private:
	int m_num;
};
ostream& operator<<(ostream& cout,const MyInteger &myint)
{
	cout << myint.m_num;
	return cout;
}
//前置++ ，先++，再返回
void test01()
{
	MyInteger myint;
	cout << ++myint << endl;
	cout << myint << endl;
}
//后置++ ，先返回，再++
void test02()
{
	MyInteger myint;
	cout << myint++ << endl;
	cout << myint << endl;
}
int main()
{
	//test01();
	test02();
	return 0;
}