第八周一（2）友元

最新推荐文章于 2024-11-13 21:24:02 发布

原创最新推荐文章于 2024-11-13 21:24:02 发布 · 670 阅读

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CC 4.0 BY-SA版权

本文介绍了一个简单的C++程序来实现复数的基本运算，包括加法、减法、乘法和除法，并通过一个测试函数展示了这些运算的效果。

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#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);
	friend Complex operator*(Complex &c1,Complex &c2);
	friend Complex operator/(Complex &c1,Complex &c2);
	void display();
 private:
	double real;
	double imag;
};
//下面定义友元函数
 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);
 }
 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;
}
//下面是测试函数
int main()
{
	Complex c1(3,4),c2(5,-10),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();
	c3=c1*c2;
	cout<<"c1*c2=";
	c3.display();
	c3=c1/c2;
	cout<<"c1/c2=";
	c3.display();
	return 0;
}

运行结果：