Is it worth it to make a base class in this case and inherit from it?

Question

Programming

In general, there are several form classes in Qt like:

//Главное окно
class MainWindow : public QMainWindow
{
//
private:
//
int m, n;
double **data, scaleX, scaleY;
}

//И много других форм, открываемых из главной формы - MainWindow
class OtherWindow : public QMainWindow
{
//
private:
//
int m, n;
double **data, scaleX, scaleY;
}

As you can see, they have common fields - is int m, n; double **data, scaleX, scaleY;it worth making a base class (from the point of view of OOP), from which these fields will be inherited or not? What do you think?

Answer 1

No, you shouldn't do that.
You break L in SOLID by such inheritance.

Answer 2

Make it protected on the underlying MainWindow and those fields will be inherited. And why even a separate class for three members?