What's the difference between c++ we study here and c++ we make application?

Answer 1

The C++ of an application has extra libraries to render graphics, possibly sound, and other useful things.

SDL2 is a good example of an additional library.

https://www.sololearn.com/discuss/498964/?ref=app

Answer 2

Try some more from this video.

- learned to use Boost from it.

https://youtu.be/CJQ1ybhP7Tw