oj平臺測試-重載運算符

/*Copyright (c) 2011, 煙臺大學計算機學院
* All rights reserved.
* 作    者： 石堯
* 完成日期：2014 年06  月 10日
* 版 本 號：v1.0
*
* 問題描述：重載運算符。
* 樣例輸入：略.
* 樣例輸出：略。
* 問題分析：略。
*/

#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;
};

//將程序需要的其他成份寫在下面，只提交begin到end部分的代碼
//******************** begin ********************
Complex  Complex::operator+(Complex &c2)
{
   return Complex (real+c2.real,imag+c2.imag);
}
Complex Complex::operator+(double &d)
{
    return Complex (real+d,imag);
}
Complex operator+(double&d,Complex &c2)//友元函數
{
    return Complex (c2.real+d,c2.imag);
}
ostream& operator << (ostream& output, const Complex& c)
{
    if(c.imag<0)
    {
        cout<<"("<<setiosflags(ios::fixed)<<setprecision(2)<<c.real<<setiosflags(ios::fixed)<<c.imag<<"i)"<<endl;
    }
    else
    {
        cout<<"("<<setiosflags(ios::fixed)<<setprecision(2)<<c.real<<"+"<<setiosflags(ios::fixed)<<c.imag<<"i)"<<endl;
    }

    return output;
}
//********************* end ********************
int main()
{
//測試複數加複數
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;

//測試複數加實數
double d;
cin>>real>>imag;
cin>>d;
c3=Complex(real,imag)+d;
cout<<"c1+d=";
cout<<c3;

//測試實數加複數
cin>>d;
cin>>real>>imag;
c1=Complex(real,imag);
c3=d+c1;
cout<<"d+c1=";
cout<<c3;

return 0;
}