第4章 第1题

#include<iostream>
using namespace std;

class Complex
{
	public:
		Complex(){real=0;imag=0;}
		Complex(double r,double i){real=r;imag=i;}
		double get_real();
		double get_imag();
		void display();
	private:
		double real;
		double imag;
};

double Complex::get_real(){return real;}

double Complex::get_imag(){return imag;}

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

 Complex operator + (Complex &c1,Complex &c2)
{
	return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag());
}

int main()

{
	Complex c1(1,2),c2(3,-17),c3;
	c3=c1+c2;
	cout<<"c3=";
	c3.display();
	return 0;
}