Learn or reference C with example code and challenges.
This module assumes you have some programming knowledge already and want a quick guide/reference to C code.
Most of the example code is taken from LearnXinYminutes (by Adam Bard, Árpád Goretity, Jakub Trzebiatowski, Marco Scannadinari and others) and is licensed under the Creative Commons Attribution-ShareAlike 3.0 License. See learnXinYminutes.com.