//用+過載實現複數相加
#include<iostream>
using namespace std;
class Complex{
public:
	Complex(){real=0;imag=0;}
	Complex(double r,double i){real=r;imag=i;}
	Complex operator+(Complex &c2);
	void display();
private:
	double real;
	double imag;
};

Complex Complex::operator+(Complex &c2)
{
	Complex c;
	c.real=real+c2.real;
	c.imag=imag+c2.imag;
	return c;
}

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

int main()
{
	Complex c1(3,4),c2(5,-10),c3;
	c3=c1+c2;
	cout<<"c1=";
	c1.display();
	cout<<"c2=";
	c2.display();
	cout<<"c1+c2=";
	c3.display();
	return 0;

}