What do you need to know to understand and how to learn QT?

Question

Qt

What topics do you need to understand in order to write (and understand what is written there) the simplest calculator in QT.
And how to teach it? (I mean, QT needs to be learned as a programming language, and just remember and understand what and how in the process. Or is it necessary to learn, somehow differently?)

Answer 1

The Qt SDK has one of the best documentation, including detailed examples.
You should start with it https://doc.qt.io/qt-5/gettingstarted.html

Answer 2

Read Blachette and Summerfield , page 40 write a calculator. The fact that the book is old enough does not matter, the principles have not changed in the part on which you will write the calculator.
Then look at the new syntax for connecting signals and slots - and you are quite modern.