//
// Created by rafalbyczek on 28.05.16.
//

#ifndef ZADANIE_J_DZIWNE_LICZBY_WEIRDNUMBER_H
#define ZADANIE_J_DZIWNE_LICZBY_WEIRDNUMBER_H

#include <iostream>

using namespace std;

class WeirdNumber {
private:
    int a, b, d;
    WeirdNumber *c;
public:
    WeirdNumber(const int a = 0, const int b = 0) : a(a), b(b), c(NULL), d(1) { }

    ~WeirdNumber() {
        if (c != NULL) {
            (*c).a += d;
        }
    }

    WeirdNumber &operator=(const WeirdNumber &k) {
        if (this != &k) {
            a = k.a;
            b = k.b;
        }
        return *this;
    }

    WeirdNumber &operator+(const WeirdNumber &k) {
        return *(new WeirdNumber(a + k.a, b + k.b));
    }

    WeirdNumber &operator-(const WeirdNumber &k) {
        return *(new WeirdNumber(a - k.a, b - k.b));
    }

    WeirdNumber &operator*(const WeirdNumber &k) {
        return *(new WeirdNumber(a * k.a + 2 * b * k.b, a * k.b + b * k.a));
    }

    WeirdNumber &operator+=(const WeirdNumber &k) {
        a += k.a;
        b += k.b;
        return *this;
    }

    WeirdNumber &operator-=(const WeirdNumber &k) {
        a -= k.a;
        b -= k.b;
        return *this;
    }

    WeirdNumber &operator*=(const WeirdNumber &k) {
        int A = a * k.a + 2 * b * k.b;
        int B = a * k.b + b * k.a;
        a = A;
        b = B;
        return *this;
    }

    bool operator==(const WeirdNumber &k) {
        return (a == k.a && b == k.b);
    }

    bool operator!=(const WeirdNumber &k) {
        return (a != k.a || b != k.b);
    }

    WeirdNumber operator++(int) {
        WeirdNumber C(a, b);
        C.c = this;
        C.d = 1;
        return C;
    }

    WeirdNumber &operator++() {
        a++;
        return *this;
    }

    WeirdNumber operator--(int) {
        WeirdNumber C(a, b);
        C.c = this;
        C.d = -1;
        return C;
    }

    WeirdNumber &operator--() {
        a--;
        return *this;
    }

    friend ostream &operator<<(ostream &stream, WeirdNumber const &w) {
        if (w.a != 0)
            stream << w.a;
        if (w.b > 0 && w.b != 1 && w.b != -1) {
            if(w.a != 0) stream << "+";
            stream << w.b << "s";
        }
        if (w.b < 0 && w.b != 1 && w.b != -1)
            stream << w.b << "s";
        if (w.b == 1) {
            if(w.a != 0) {
                stream << "+s";
            }
            else {
                stream << "s";
            }
        }
        if (w.b == -1) {
            stream << "-s";
        }
        if (w.a == 0 && w.b == 0) {
            stream << "0";
        }
        return stream;
    }
};

#endif //ZADANIE_J_DZIWNE_LICZBY_WEIRDNUMBER_H