C++重载运算符的友元重载

最新推荐文章于 2024-09-28 16:11:39 发布

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最新推荐文章于 2024-09-28 16:11:39 发布

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分类专栏： C++

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本文详细介绍了如何在C++中通过友元函数来重载运算符，特别是'+'和'-'这两个运算符的实现过程。

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定义格式 friend 类名 operator 运算符名称（形参表）
实现“+”和“-”

#include <iostream>
using namespace std;
class Complex
{
public:
	Complex()
	{
		real = 0;
		imag = 0;
	}
	Complex(double r, double i)
	{
		real = r;
		imag = i;
	}
	friend Complex operator+(Complex &c1,Complex &c2);
	friend Complex operator-(Complex &c1, Complex &c2);
	void display();
private:
	double real;
	double imag;
};
Complex operator+(Complex &c1,Complex &c2)
{
	return Complex(c1.real + c2.real, c1.imag + c2.imag);
}
Complex operator-(Complex &c1, Complex &c2)
{
	return Complex(c1.real - c2.real, c1.imag - c2.imag);
}
void Complex::display()
{
	cout << "(" << real << "," << imag << "i)" << endl;
}
int main()
{
	Complex c1(4, 6), c2(6, 2), c3;
	
	cout << "c1="; c1.display();
	cout << "c2="; c2.display();
	c3 = c1 + c2;
	cout << "c1+c2="; c3.display();
	c3 = c1 - c2;
	cout << "c1-c2="; c3.display();
	while (1);
	return 0;
}