左移、右移运算符重载

最新推荐文章于 2024-02-13 13:55:07 发布

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最新推荐文章于 2024-02-13 13:55:07 发布

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文章标签： C++

本文链接：https://blog.youkuaiyun.com/weixin_43665091/article/details/86601927

本文详细介绍了C++中如何重载左移<<和右移>>运算符，包括它们在I/O流和自定义类型中的使用，以及重载的语法和注意事项。

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#include <iostream>

using namespace std;

class Complex
{
    friend ostream &operator <<(ostream &out, Complex &c);
    friend istream &operator >>(istream &in, Complex& c);
    friend Complex operator +(int num, Complex &c);
public:
    Complex(int a = 0, int b = 0)
    {
        m_a = a;
        m_b = b;
    }
    void show()
    {
        if (m_b == 0)
            cout << m_a << endl;
        else if(m_b>0)
            cout << m_a << " + " << m_b << "i" << endl;
        else
            cout << m_a << " - " << m_b*-1 << "i" << endl;
    }

    Complex operator +(Complex &c)
    {
        Complex tmp(m_a+c.m_a, m_b+c.m_b);
        return tmp;
    }

    Complex operator +(int num)
    {
        Complex tmp(m_a+num, m_b);
        return tmp;
    }

private:
    int m_a;   // 实部
    int m_b;   // 虚部
};

ostream &operator <<(ostream &ou