ACM-C+作业复数运算符重载（+与<<）

/*
* 程序的版权和版本声明部分:
* Copyright (c) 2013.烟台大学计算机学院
* All rights reserved.
* 文件名称：
* 作    者：何新新
* 完成日期：2014 年 5月 23日
* 版 本 号：v1.0
* 对任务及求解方法的描述部分:
* 输入描述：
* 问题描述：
* 程序输出:
*/
#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 &c)
{
Complex c1;
c1.real=real+c.real;
c1.imag=imag+c.imag;
return c1;
}
Complex Complex::operator+(double &c)
{
Complex c1;
c1.real=real+c;
c1.imag=imag;
return c1;
}
Complex operator+(double&d,Complex &c)
{
Complex c1;
c1.imag=c.imag;
c1.real=d+c.real;
return c1;
}
ostream& operator << (ostream& output, const Complex& c)
{
if(c.imag>=0)
output<<"("<<setiosflags(ios::fixed)<<setprecision(2)<<c.real<<"+"<<setiosflags(ios::fixed)<<setprecision(2)<<c.imag<<"i)"<<endl;
else
output<<"("<<setiosflags(ios::fixed)<<setprecision(2)<<c.real<<setiosflags(ios::fixed)<<setprecision(2)<<c.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;
}