I can write C/C++, some snipplet. I can solve leetcode with C/C++, but I never claim I can write C/C++, becuase I don't know how to finish the project. I know a little bit of cmake and Makefile, but I don't know the configuration and dependency thing.
You can't say you know C++ because you can print hello world on the console.
And I still don't know how to build cmake project with win32 related things.