#include <iostream>
#include <conio.h>
using namespace std;



class complex {
private:
	double real;
	double imagine;
	double bufer1;
	double bufer2;

public:
	complex();
	complex(double a, double b);

	void operator+(complex x);
	void operator-(complex x);
	void operator*(complex x);
	void operator/(complex x);
	~complex();


	void printer();

};
complex :: complex() {
	real = 0;
	imagine = 0;


}
complex::~complex() {
	cout << "Bye-Bye" << endl;
}
complex::complex(double a, double b) {
	real = a;
	imagine = b;
}
void complex::operator+(complex x) {
	bufer1 = x.real + real;
	bufer2 = x.imagine + imagine;
}
void complex::operator-(complex x) {
	bufer1 = real	- x.real;
	bufer2 = imagine - x.imagine;

}
void complex::operator*(complex x) {
	bufer1 = real * (x.real) - imagine * x.imagine;
	bufer2 = real * (x.imagine) + imagine * x.real;
}
void complex::operator/(complex x) {
	bufer1 = (real*x.real - imagine * x.imagine) / (x.real*x.real + x.imagine*x.imagine);
	bufer2 = (imagine * x.real - real * x.imagine) / (x.real*x.real + x.imagine*x.imagine);
}
void complex::printer() {
	cout << bufer1 << "+" << "i*" << bufer2 << endl;
}
int main() {
	double a, b,c,d;
	cin >> a >> b;
	//complex first;
	complex *first = new complex(a,b);
	cin >> c >> d;
	//complex second;
	complex *second = new complex(c, d);
	//first.printer();

	cout << "summa" << endl;
	first = first+*second;
	first->printer();
	//delete first;
	//complex *first = new complex(a, b);

	cout << "minus" << endl;
	first->minus(*second);
	first->printer();
	//delete first;
	//complex *first = new complex(a, b);

	cout << "mnoji" << endl;
	first->mult(*second);
	first->printer();
	//delete first;
	//complex *first = new complex(a, b);

	cout << "del" << endl;
	first->del(*second);
	first->printer();
	//complex first(a, b);


	delete first;
	delete second;

	complex *third = new complex();
	_getch();
}