定義一個複數類Complex，重載運算符"+"

定義一個複數類Complex，重載運算符"+".使之能用於複數的加法運算，將運算符函數重載爲非成員、非友員的普通函數。編寫程序求2個複數之和。

 

#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();

}