#include <iostream>
using namespace std;

class cComplex{
public:
	double a;
	double b;
	void init(){
		a = b = 0;
	}
	void set(double x, double y){
		a = x;
		b = y;
	}
	void print(){
		if(b >= 0){
			cout << a << "+" << b << "i" << endl;
		}else{
			cout << a << b << "i" << endl;
		}
	}
	cComplex add(cComplex o){
		cComplex sum;
		sum.a = a + o.a;
		sum.b = b + o.b;
		return sum;
	}
};

int main(){

	cComplex i, my, me;
	i.init();
	my.init();
	i.print();
	my.print();

	i.set(2, 3);
	my.set(1, -1);
	i.print();
	my.print();

	me = i.add(my);
	me.print();


	return 0;
}