8-1.2 复数类运算符的重载之友元函数

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/** 程序的版权和版本声明部分* Copyright (c)2012, 烟台大学计算机学院学生* All rightsreserved.* 作者：田宇* 完成日期： 2013年 4 月 23 日* 版本号： v1.0* 输入描述：无* 问题描述：无* 程序输出：无*/#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;};//下面定义成员函数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,c1.real*c2.imag+c1.imag*c2.real);}Complex operator/(Complex &c1,Complex &c2){double d;d=c2.real*c2.real+c2.imag*c2.imag;return Complex((c1.real*c2.real+c1.imag*c2.imag)/d,(c1.imag*c2.real-c1.real*c2.imag)/d);}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();std::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：

*心得体会:

今个儿早上天不错。。。