What version-control system is most trivial to set up and use for toy projects?

Question

I teach the third required intro course in a CS department. One of my homework assignments asks students to speed up code they have written for a previous assignment. Fact

Answer 1

RCS for linux.

I've found nothing simpler than RCS for Widows but not all the RCS ports work well so you have to try them which makes it non-simple. Windows just isn't simple for developers. The windows port from http://www.cs.purdue.edu/homes/trinkle/RCS/ is pretty good.