前置后置运算符重载

#include<iostream>
using namespace std;


//重载递增运算符

//自定义整型
class MyInteger
{
    
	friend ostream& operator<<(ostream& cout, MyInteger myint);
public:
	MyInteger()
	{
    
		m_Num = 0;
	}

	//重载前置++运算符 返回引用为了一直对一个数据进行递增操作
	MyInteger& operator++()
	{
    
		//先进行++运算 
		m_Num++;

		//再将自身做返回
		return *this;
	}

	//重载后置++运算符 
	//void operator++(int) int代表占位参数，可以用于区分前置和后置递增
	MyInteger operator++(int)
	{
    
		//先 记录当时结果
		MyInteger temp = *this;
		//后 递增
		m_Num++;
		//最后将记录结果做返回
		return temp;
	}

private:
	int m_Num;
};


//重载<<运算符
ostream& operator<<(ostream& cout, MyInteger myint)
{
    
	cout << myint.m_Num;
	return cout;
}

void test01()
{
    
	MyInteger myint;

	cout << ++(++myint) << endl;
	cout << myint << endl;

}

void test02()
{
    
	MyInteger myint;

	cout << myint++ << endl;
	cout << myint << endl;
}

int main() {
    

	//test01();

	test02();
	//int a = 0;

	//cout << ++(++a) << endl;
	//cout << a << endl;

	system("pause");

	return 0;
}