运算符重载—复数的计算

/*
*Copyright (c) 2016 烟台大学计算机与控制工程学院
*All rights reserved.
*文件名称：test.cpp
*作    者：史红浩
*完成日期：2016年 6 月 13 日
*版 本 号：v1.0
*/

#include<iostream>
#include <iomanip>
using namespace std;
class Complex
{
public:
Complex(){real=0;imag=0;}
Complex(double r,double i){real=r; imag=i;}
Complex operator+(const Complex &c2);
Complex operator-(const Complex &c2);
Complex operator*(const Complex &c2);
Complex operator/(const Complex &c2);
void display();
private:
double real;
double imag;
};
//下面定义成员函数
Complex Complex::operator+(const Complex &c2)
{
Complex c;
c.real=real+c2.real;
c.imag=imag+c2.imag;
return c;
}
Complex Complex::operator-(const Complex &c2)
{
Complex c;
c.real=real-c2.real;
c.imag=imag-c2.imag;
return c;
}
Complex Complex::operator*(const 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/(const Complex &c2)
{
Complex c;
c.real=(real*c2.real+imag*c2.imag)/(real*real+c2.imag*c2.imag);
c.imag=(imag*c2.real-real*c2.imag)/(real*real+c2.imag*c2.imag);
return c;
}
void Complex::display()
{
if(real!=0&&imag>0)
cout<< fixed << setprecision(2)<<real<<"+"<<imag<<"i"<<endl;
if(real!=0&&imag<0)
cout<< fixed << setprecision(2)<<real<<imag<<"i"<<endl;
if(real==0&&imag!=0)
cout<< fixed << setprecision(2)<<imag<<"i"<<endl;
if(imag==0&&real!=0)
cout<< fixed << setprecision(2)<<real<<endl;
if(imag==0&&real==0)
cout<< fixed << setprecision(2)<<"0"<<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;
}