第八周项目1-实现复数类中的运算符重载（类的成员函数）

/*
* 程序的版权和版本声明部分
* Copyright (c)2013, 烟台大学计算机学院学生
* All rightsreserved.
* 文件名称:.cpp
* 作者：王英华
* 完成日期： 2013年04月15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;}
Complex operator+(Complex &c2);
Complex operator-(Complex &c2);
Complex operator*(Complex &c2);
Complex operator/(Complex &c2);
void display();
private:
double real;
double imag;
};
//下面定义成员函数
Complex Complex::operator+(Complex &c2)
{
return  Complex(real+c2.real,imag+c2.imag);
}
Complex Complex::operator-(Complex &c2)
{
return Complex(real-c2.real,imag-c2.imag);
}
Complex Complex::operator*(Complex &c2)
{
Complex c;
c.real=real*c2.real-imag*c2.imag;
c.imag=imag*c2.real+real*c2.imag;
return c;
}
Complex Complex::operator/(Complex &c2)
{
Complex c;
c.real=((real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag));
c.imag=((imag*c2.real+real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag));
return c;
}
void Complex:: display()
{
cout<<"("<<real<<","<<imag<<"i"<<")"<<endl;
}
//下面定义用于测试的main()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;
}