For this task, please implement a long number calculator. That includes the fully operable long number with all the same operations as the int type.

class LongNumber
{
    // ...
public:
    operator int() const;

    LongNumber& operator++();
    LongNumber operator++(int);

    LongNumber& operator--();
    LongNumber operator--(int);

    LongNumber& operator+=(LongNumber const& rhs);
    LongNumber& operator-=(LongNumber const& rhs);
    LongNumber& operator*=(LongNumber const& rhs);
    LongNumber& operator/=(LongNumber const& rhs);

    int operator<=>(LongNumber& rhs);

    friend istream& operator>>(istream&, LongNumber const&);
    friend ostream& operator<<(ostream&, LongNumber const&);
    // ...
}

There are two common ways for use of data storage under the hood, each has it's pros and cons. I "forced" you to use the int representation, however the easier option would be to implement it using a character string, which would then simply store a 10 - base representation of the number. Since we haven't departed too far with the implementation, we can switch to that as I don't want to overcomplicate the implementation for you. That would harm the learning process.

@mamedxanli

Dear Alek! As for the 3rd project, I'd like you to implement the HashTable class as your next assignment.

That would help you better understand templates, OOP and STL and move semantics. That's a very applied problem which is inspired by industry tasks.

Feel free to ask any questions you have here and during our sessions. Just to let you know, I already finished this practical myself, but it could be better and is simply a sketch of the solution. So you should look there only for inspiration, not an answer immediately.

Initially, I thought about giving it to you as Practical 2, but I have a better idea.

Let me know how that sounds to you.