That's the only one I liked actually, the huffman encoding binary tree. Everything else was iterative and ugly, I liked the change to recursion. Umm ... as to the class stuff. I glanced at the case study on the ap site. I got the basic design of it, but didn't really look into the code much. I had to do that during the test on one of them, but other than that it wasn't too bad. As for the other types of questions ... if you just hang out on the right newsgroups and read manpages or tutorials, then you eventually learn
Stephen