定义一个复数类Complex，重载运算符"+"

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，将运算符函数重载为非成员、非友员的普通函数。编写程序求2个复数之和。

 

#include<iostream>
using namespace std;
class Complex
{
public:
    Complex(){real=0;imag=0;}
    Complex(double r,double i){real=r;imag=i;}
    void display();
    double real;
    double imag;
};

void Complex::display()
{
    cout<<"("<<real<<","<<imag<<"i)";
}

Complex operator +(Complex &c1,Complex &c2)
{
    Complex p;
    p.real=c1.real+c2.real;
    p.imag=c1.imag+c2.imag;
    return p;
}
int main()
{
    Complex c1(5,2),c2(1,3),c3;
    c1.display();
    cout<<"+";
    c2.display();
    cout<<"=";
    c3=c1+c2;
    c3.display();

}