This is my first time replying to another's question but i think i know your problem.
The "Header" files you are missing are in essence library files.
In other words, the libraries that come with C are built into your language and you just
need to declare them at the top of your class that you are compiling. I noticed ur missing
stdio.h and stdlib.h, just type:
Let me know if this helps since im kinda curious.