Thanks Bob.
Since this seems to be the correct answer, I'll close this thread.
itsmevky, RepRap is a community of people who build and use 3D printers. I'd suggest that you take general homework questions somewhere else, as RepRap is probably not the right place for that sort of thing.
-Sebastien, RepRap.org library gnome.
Remember, you're all RepRap developers (once you've joined the super-secret
developer mailing list), and the wiki, RepRap.org, [
reprap.org] is for everyone and everything!