C++//递增运算符重载

#include <iostream>
#include <string>
using namespace std;

//重载递增运算符

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

    //重载 前置++运算符   返回引用为了对一个数据进行++
    //返回引用
    MyInteger& operator++()
    {

        //先进行 ++运算
        m_Num++;

        //再将自身作为返回
        return *this;
    }


    //重载后置++运算符
    //void operator++(int)   int 代表占位参数，可以用于区分前置喝后置递增
    //返回值
    MyInteger operator++(int)
    {
        //先记录当时结果
        MyInteger temp = *this;

        //后 递增
        m_Num++;
        //最后将结果返回
        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;    //2
    cout << myint << endl;          //2
}

void test02()
{
    MyInteger myint;

    cout << myint++ << endl;  //0

    cout << myint<< endl;     //1

}


int main()
{
    test01();
    test02();
}