C++运算符重载—复数

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原创最新推荐文章于 2026-03-29 10:36:50 发布 381 阅读 AI 写同款· GEO 优化 ›

C++复数类实现运算符重载目录： 1.关于运算符重载 2.运算符重载的方式：成员函数和友元函数 3.只能用成员函数重载的运算符 4.利用复数类实现运算符重载 1.关于运算符重载 运算符重载就是对现有的运算符重新定义，赋予其另一种功能，以实现不同的数据类型。其本质还是函数的重载，使用运算符重载可以使程序更清晰。运算符重载的关键字operator。C++绝大多数运算符都可以重载，不能重载的运算符有. :: .... 阅读详情

C++运算符重载

案例：复数

Complex.h

#pragma once
#include <iostream>

class Complex
{
	friend std::ostream& operator<<(std::ostream &out, const Complex &c);
public:
	Complex(int real, int image);
	~Complex();

	Complex operator+(const Complex &c);
	Complex& operator+=(const Complex &c);
	Complex& operator++();			//前置
	const Complex operator++(int);	//后置
	
private:
	int m_real;
	int m_imag;
};

std::ostream& operator<<(std::ostream &out, const Complex &c);

Complex.cpp

#include "Complex.h"

Complex::Complex(int real, int imag)
	: m_real(real)
	, m_imag(imag) 
{
}

Complex::~Complex()
{
}

Complex Complex::operator+(const Complex & c)
{
	return Complex(m_real+c.m_real, m_imag+c.m_imag);
}

Complex& Complex::operator+=(const Complex & c)
{
	this->m_real += c.m_real;
	this->m_imag += c.m_imag;

	return *this;
}

Complex& Complex::operator++()
{
	this->m_real++;
	this->m_imag++;

	return *this;
}

const Complex Complex::operator++(int)
{
	Complex tmp = *this;
	this->m_real++;
	this->m_imag++;

	return tmp;
}

std::ostream& operator<<(std::ostream &out, const Complex &c)
{
	return out << c.m_real << " + " << c.m_imag << "i";
}

main.cpp

#include "Complex.h"

int main()
{
	std::cout << Complex(1, 2) + Complex(2, 1) << std::endl;
	std::cout << ++Complex(1, 1) << std::endl;
	std::cout << Complex(0, 0)++ << std::endl;
	system("pause");
	return 0;
}

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