You can do your programming for the course on our cdf unix machines
(which can be accessed by phone, unlike the cdf PCs),
or on any machine where you have access to an ANSI C compiler.
If you want to work on your own machine,
you don't have to buy a C compiler - I'll tell you in 228
how to get a copy of a free one.
It doesn't have a fancy interface, but it works.
If you want to buy a fancier compiler, many of my students have
used Borland C and been happy with it.