Where can I find the class constructor?

Question

Qt

I am still surprised that Max Schlee's book is for beginners ..
Actually, the section begins with this

Where can I get this constructor? Why did he start with this? How to achieve the same "similar result" about which it is written below?

Answer 1

Without understanding OOP in C ++, at least the basics, there is nothing to do in the Qt world at all. No knowledge of OOP and basic knowledge of the language - you will never master Qt.
I think that somewhere in Schlee's book it says that you should understand OOP, although I'm not sure. So the book is not needed: examples + documentation + forums - that's enough.
Answering your question, the methods can be found here: https://doc.qt.io/qt-5/qwidget.html .

Answer 2

Apparently something like this:
Wdiget *w = new Widget(Qt::Window | Qt::WindowTitleHint | Qt:WindowStaysOnTopHint);
In general, first read something in pure C ++ without Qt admixture. They write about such things there - where to look for a constructor, how to use it, how and why to write it, as well as many other interesting things.
Buy Stroustrup's book "The C++ Programming Language".

Answer 3

Is it just me, or is Schlee's book on Qt as difficult for "beginners" as Stroustrup's C++ book for "beginners"?
Okay, I don't care that Summerfield has Qt4, but at least he explains it better. I'll go read it.