What comes after learning basic and object oriented programming in C++ , I also cover file handling .
There are many bits in the Standard Template Library that you should know about
- random, chrono
- have you learned all your containers?
- I really like
- Do you know what structured bindings are?
- Smart pointers are very important.
- Move semantics.
- Oh, templates and template meta programming.
That should keep you busy for the next year or two.