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本文介绍了一个简单的复数类实现，包括复数之间的加法运算、复数与实数的加法运算，并展示了如何通过重载运算符来实现这些功能。

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/*  
*Copyright (c) 2013 ,烟台大学计算机与控制工程学院
*All rights reserved.  
*作者：王至超  
*完成日期：2014年05月25 
*版本号：v1.0  
*问题描述：  
*样例输入： 
*样例输出：
*问题分析：用简单的方法，学会活学活用  
*/  

#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 &c1)
{Complex c;
c.real=real+c1.real;
c.imag=imag+c1.imag;
return c;
}
 Complex  Complex:: operator+(double &c2)
 {
     return Complex(real+c2,imag);
 }
 Complex operator+(double&c3,Complex &c4)
 {
     return  Complex (c3+c4.real,c4.imag);
 }
//********************* end ********************
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;
}
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;
}