#include "pch.h"
#include <iostream>

using namespace std;

class ComplexNumber {
public:
    ComplexNumber() {
        imagine = 0;
        real = 1;
    }
    ComplexNumber(double re, double im) {
        imagine = im;
        real = re;
    }
    void ShowNumber() {
        cout << real;
        if (imagine == 0) return;
        if (imagine > 0) {
            cout << " + i" << imagine;
        }
        else {
            cout << " - i" << imagine*(-1);
        }
        cout << endl;
    }
    ComplexNumber operator+(ComplexNumber complexnumber) {
        complexnumber.real += real;
        complexnumber.imagine += imagine;
        return complexnumber;
    }
    ComplexNumber operator-(ComplexNumber complexnumber) {
        complexnumber.real -= real;
        complexnumber.imagine -= imagine;
        return complexnumber;
    }
    ComplexNumber operator*(ComplexNumber complexnumber) {
        complexnumber.real *= real;
        complexnumber.imagine *= imagine;
        return complexnumber;
    }

private:
    double real;
    double imagine;
};

int main()
{
    ComplexNumber complexnumber(1, -5);
    ComplexNumber complexnumber2(1, 5);
    complexnumber.ShowNumber();
    complexnumber2.ShowNumber();
    ComplexNumber complexnumber3 = complexnumber + complexnumber2;
    complexnumber3.ShowNumber();

}