类和对象第五部分第三小节：递增运算符重载

陈天白2024-01-28 20:32

作用：通过重载递增运算符，实现自己的整型数据递增

代码案例

1.重载前置++运算符

cpp 复制代码

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

class MyInteger {
    friend ostream& operator<<(ostream& out, const MyInteger& myint);

public:
    MyInteger() {
        m_Num = 0;
    }

    // 前置++
    MyInteger& operator++() {
        ++m_Num; // 先自增
        return *this; // 再返回
    }

private:
    int m_Num;
};

// 重载输出运算符
ostream& operator<<(ostream& out, const MyInteger& myint) {
    out << myint.m_Num;
    return out;
}

void test01() {
    MyInteger myInt;
    cout << ++myInt << endl;
}

int main() {
    test01();
    system("pause");
    return 0;
}