QT C++ Why is the code so different?

Question

Qt

Why is C++ code different from qt code?
To output Hello world! in c++ you need : cout << "Hello world!" <<endl;
And in Qt (we will assume that this is written in the button function): qDebug() << "Hello world!";
And in general, is qt a separate programming language (If so, where is the best place to read about it)?

Answer 1

Why is C++ code different from qt code?

The question was originally formulated incorrectly. It should have been written "from code written using Qt". In your opinion, there are visual differences, but this is because Qt provides its own APIs.

To output Hello world! in c++ you need : cout << "Hello world!" <<endl;
And in Qt (we will assume that this is written in the button function): qDebug() << "Hello world!";

The cout option will work exactly the same.

And in general, is qt a separate programming language (If so, where is the best place to read about it)?

No, Qt is not a separate programming language, but a set of libraries or a framework (depending on how you use it) + a set of tools.
However, for UI development, Qt can use a separate language called QML. But you may not use it.