Some interesting C problems. Dear visitor, Thanks for your interest in C programming. In this page, you will find a list of interesting C programming questions/puzzles, These programs listed are the ones which I have received as e-mail forwards from my friends, a few I read in some books, a few from the internet, and a few from my coding experiences in C. C# Essentials. C# for Absolute Beginners. C# for Sharp Kids. Programr: CPP. Programr - About. WiBit.net: Programming in C.