Here's some more information on compilers, shamelessly stolen from
Matt Harris' old CS113 page:

<P>C Compilers

<P>You may use any ANSI C compiler to which you have access, but CodeWarrior is universally available in nearly all ATS computer labs on
campus, including the Upson B7 lab. Unfortunately, CodeWarrior is a little tricky to use at first. To get started, assuming you're on a PC:

<BR>   1.Launch CodeWarrior 
<BR>   2.Select "New Project..." from the "File" menu 
<BR>   3.On the "Select project stationary" dialog, expand the "Win32-x86" item (by clicking in the boxed "+" to the left of the item). Then
     expand "C, C++", select the "C Console App" option, and press the button to create the project. 
<BR>   4.In the project window that appears, expand the "Source" item, and double-click on "main.c", which is the file that will contain your
     program. 
<BR>   5.Write your program in the "main.c" window (you may remove the sample program that initially appears). To compile and run your
     program, select "Run" from the "Project" window.