I have a question that I know is going to make me look stupid. Im trying to round a number up, and I've included this #include <math.h>. I've been searching for a long time and I can't see why my compiler keeps telling me Math.Ceiling is an underclared identifier. I've read that I should add "-lm" to something but I have been able to see what I should add it to. Im using the Microsoft Visual c++ 2005 express edition beta 2 compiler. Any ideas?