When your lost as to what you want to program...

Question

It's been awhile since I first started down the alley of computing but..... I have 1 problem... Libraries......I have no idea which C libraries are for what and how does Java get it's libraries and functions , how exactly would it pertain to different tasks? i.e.: Developing a Bluetooth remote libraries compared to Libraries to program a media player I need more basic understanding.
My current languages include c# ,c++, java, assembly, JavaScript, bash, html, a bit of sql, and php, maybe a little python.

Answer 1

I know that C uses header files like e.g. FILE.h but that's about it