programming

I can look over someone's code and tell if they are a slumming math guy. In other words, the guy who has a PhD in some esoteric math field, but now, for some reason, has to demean himself to coding for a living. Here are a few clues I see in the code:

• You use i, j, k, l as variable names, liberally.
• Your objects have no clear separation of responsibility.
• You pass way too much between functions as member variables, globals and so on.