In C. There are functions to read and write files (fwrite I think).

For directories, try this:
http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1046380353&id=1044780608

EDIT: http://en.wikipedia.org/wiki/C_file_input/output for reading and writing.

I know about the file functions, but now how to use them properly, and the docs don't help
The directory example uses dir.h, which is not available for download anywhere nearby.

I see.  IIRC, you open the file, and read it. Haven't done that in a while. I know you open it, read the file, and then close it. Not sure otherwise.

Quote from: graphmastur on December 12, 2010, 10:35:53 pm

IIRC, you open the file, and read it

* SirCmpwn slaps graphmastur

Lol, sorry. It's platform specific, IIRC, so you are best off using a methods within #ifdef (Wait, that's C right?) based on the OS.  So, yeah, not exactly sure. I've done it before, but only when writing a stream to a log file, and that was a year ago, so I don't fully remember.

I might just look at the source code for mViewer, released about 12 minutes ago

That could work. Wait, is this for NSpire coding? Oh, I have no idea, then.

You might want to look at the source for either bwang's bmpviewer or critor's ndshell.  Both of those programs use file listing.  I have never used this, so I won't be of any help for this (although, I better learn soon, as it will probably be used in Chip's Challenge )

Here:  http://ti.bank.free.fr/index.php?mod=archives&ac=voir&id=2001