Request for comment on my tiny learning project: dfighterdb (mytree)

Dear everyone!
dfighterdb (I started it as mytree), is a tiny and simple console based "database" application I'm writing as a learning project.
It's purpose is to teach me some generic dynamic data structures, and general design of "larger" projects (Basically a binary tree and a linear list with 256 generic fields).
It's not complete yet, however it is complete enough to present an insight into my "coding style", to show how well (or badly) I can use the language, how portable the code is, general design of the project, etc.
So I'd like to ask you all if you have the time to review it and comment on it.

zipped source code + win32 binary: http://www.freeweb.hu/dfighter/dfighterdb.zip

mirror: http://jesterpm.net/filebin2/1429525413/dfighterdb.zip


Thanks a bunch in advance.

dfighter
.