C++——定义一个复数类Complex，重载运算符“+”，使之能用于复数的加法运算。将运算符重载为非成员、非友元的普通函数。编写程序，求两个复数之和。

没注释的源代码

#include <iostream>

using namespace std;

class Complex

{

public:

    Complex(){real=0;imag=0;}

    Complex(double r,double i){real=r;imag=i;}

    void display()

    {

        cout<<"("<<real<<","<<imag<<"i)"<<endl;

    }

    double get_real()

    {

        return real;

    }

    double get_imag()

    {

        return imag;

    }

private:

    double real;

    double imag;

};

Complex operator+(Complex &c1,Complex &c2)

{

    return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag());

}

int main()

{

    Complex c1(3,4),c2(5,-10),c3;

    c3=c1+c2;

    c3.display();

    return 0;

}