Where to find stdio.h functions implementations?

Question

I study C and I noticed that I can\'t find the implementation file for some header files like, for example, stdio.h which is a library which contains a lot of i

Answer 1

You need to find the source code for a C standard library like glibc: http://www.gnu.org/s/libc/

You can download the source here: http://ftp.gnu.org/gnu/glibc/ It contains source for all the library functions.