File and Folder structure of a App/Project based in C [closed]

Answer 1

For the directory layout/class structure I suggest reading this

http://www.javapractices.com/topic/TopicAction.do?Id=205

The link talks about Java but it applies to any Language (even non- OOP)

You might also find this interesting

http://www.gnu.org/prep/standards/html_node/index.html