Allow me to be blunt, you probably interpreted the situation wrong. Perl syntax or switch syntax is not the big deal here (although it is wrong), by looking at the fact you thought switch was needed, I believe, what important, and seems to be missing here is the skill to analyze the problem, and the ability to come up the right algorithm.

I am not try to hurt your feeling, not at all, but rather point out your weak point, so you know what you need to improve. Pay a little bit more attention to that area, it helps.

But hey, with your couragement, no issue is unresolvable!