#include <iostream>
#include<fstream>
using namespace std;
class Complex {
public:
	Complex(int a, int b);
	Complex();
	friend ostream&operator<<(ostream&os, const Complex & z);
	friend istream&operator>>(istream&is,  Complex & z);
	Complex operator+(const Complex&z);
	Complex operator-(const Complex&z);
	Complex operator*(const Complex&z);
	Complex operator/(const Complex&z);
private:
	int a;
	int b;
};
Complex::Complex(int a, int b) {
	this->a = a;
	this->b = b;
};
Complex::Complex() {
	this->a = 0;
	this->b = 0;
};
Complex Complex::operator+(const Complex&z) {
	Complex zz;
	zz.a = a + z.a;
	zz.b = b + z.b;
	return zz;
}

Complex Complex::operator*(const Complex&z) {
	Complex zz;
	//(a+ib)(c+id)=ac+iad+ibc-bd=(ac-bd)+i(ad+bc)
	zz.a =(a*z.a)-(b*z.b) ;
	zz.b = (a*z.b)+(b*z.a);
	return zz;
}
Complex Complex::operator/(const Complex&z) {
	Complex zz;
	//(a+ib)/(c+id)=((a+ib)(c-id))/(c*c+d*d)=(ac+bd)/(c^2+d^2)+i(bc-ad)/(c^2+d^2);
	zz.a = (a*z.a+b*z.b)/(z.a*z.a+z.b*z.b);
	zz.b = (b*z.a-a*z.b)/ (z.a*z.a + z.b*z.b);
	return zz;
}
Complex Complex::operator-(const Complex&z) {
	Complex zz;
	zz.a = a - z.a;
	zz.b = b - z.b;
	return zz;
}

istream&operator>>(istream&is, Complex & z) {
	cout << "z=a+i*b" << "\nEnter a:";
	is >> z.a;
	cout << "\nEnter b:";
	is >> z.b;
	system("cls");
	return is;
};
ostream&operator<<(ostream&os, const Complex & z) {
	if (z.b > 0) {
		os << z.a << "+" << z.b<<"i"<< endl;
	}
	else {
		os << z.a << "-" << abs(z.b) <<"i"<< endl;
	}
	return os;
};


int main()
{
	Complex z1;
	Complex z2;
	cin >> z1;
	cin >> z2;
	cout << z1;
	cout << z2;
	Complex z3 = z1 + z2;
	cout <<"+ "<< z3;
	z3 = z1 - z2;
	cout <<"- "<< z3;
	z3 = z1 * z2;
	cout <<"* "<< z3;
	z3 = z1 / z2;
	cout <<"/ "<< z3;
	return 0;
};