You've probably also been asked to do it at some point during your formal CS education, if you had one. Grading this problem on the final for the introductory C

You've probably also been asked to do it at some point during your formal CS education, if you had one. Grading this problem on the final for the introductory CS course was a load of fun, let me tell you... (and yet, I had to do the exercise myself just now, because I haven't touched that stuff in a couple years and I was worried I'd forgotten!)