OJ2535复数运算符重载

/*
* Copyright (c)2013, 烟台大学计算机学院学生
* All rightsreserved.
* 文件名称： array.cpp
* 作    者：   李中意
* 完成日期：2014  年 6 月 11 日
* 版本号： v1.0
* 输入描述：无
*/

#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+(Complex &);
Complex operator+(double &);
friend Complex operator+(double&,Complex &);
friend ostream& operator << (ostream& output, const Complex& c);
private:
double real;
double imag;
};

//将程序需要的其他成份写在下面，只提交begin到end部分的代码
//******************** begin ********************
Complex Complex::operator+(Complex &c2)
{
    Complex c;
    c.real=real+c2.real;
    c.imag=imag+c2.imag;
    return c;
}
Complex Complex::operator+(double &d)
{
    Complex c;
    c.real=real+d;
    c.imag=imag;
    return c;
}
Complex operator+(double &d,Complex &c1)
{
    Complex c;
    c.real=d+c1.real;
    c.imag=c1.imag;
    return c;
}
ostream& operator << (ostream& output, const Complex& c3)
{
    output<<setiosflags(ios::fixed)<<setprecision(2)<<"("<<c3.real;
    if(c3.imag>=0)output<<"+";
    output<<c3.imag<<"i)"<<endl;
    return output;
}
//********************* end ********************
int main()
{
//测试复数加复数
double real,imag;
cin>>real>>imag;
Complex c1(real,imag);
cin>>real>>imag;
Complex c2(real,imag);
Complex c3=c1+c2;
cout<<"c1+c2=";
cout<<c3;

//测试复数加实数
double d;
cin>>real>>imag;
cin>>d;
c3=Complex(real,imag)+d;
cout<<"c1+d=";
cout<<c3;

//测试实数加复数
cin>>d;
cin>>real>>imag;
c1=Complex(real,imag);
c3=d+c1;
cout<<"d+c1=";
cout<<c3;

return 0;
}