c++ -> 左移 && 右移运算符重载

最新推荐文章于 2025-07-14 13:53:21 发布

原创最新推荐文章于 2025-07-14 13:53:21 发布 · 1.4k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个名为Complex的复数类的定义及其实现，并通过运算符重载来支持链式编程，使复数对象能够直接与C++标准输出流配合使用。

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#include <iostream>

using namespace std;

class Complex
{
private:
    int a;
    int b;
    //friend void operator<<(ostream &out, Complex &c1);
    friend ostream& operator<<(ostream &out, Complex &c1);

public:
    Complex(int a = 0, int b = 0)
    {
        this->a = a;
        this->b = b;
    }


    void printCom()
    {
        cout << a << "+" << b << "i" << endl;
    }
};

//定义全局函数
/*
//返回空类型不支持链式编程 例如：cout << c1 << "23333" <<endl;会报错
void operator<<(ostream &out, Complex &c1)
{
    out << "23333" << endl;
    out<< c1.a << "+" <<c1.b << "i" <<endl;
}
*/

//实现链式编程
ostream& operator<<(ostream &out, Complex &c1)
{
    out << "test" << endl;
    out << c1.a << "+" <<c1.b << "i" <<endl;
    return out;
}


int main()
{
    Complex c1(1, 2), c2(3, 4);
    cout << c1;

    cout << c1 << "23333" <<endl;


    return 0;
}