File Inclusion

[tinderfitles]

Heres what I'm after:

Our team has created a backup limit switch system for our robot, and to challenge myself, I'm making it so that the limit switches add together and depending on the number reached, the arm of our robot will either be allowed to move up or it will remain in its current position until a down signal is recieved from the controller. now, I'm having an issue with negative numbers, and I'm attempting to get easyC to include the ANSI header file "stdlib.h" to allow me to use the absolute value function, however, easyC has a seizure when I attempt to include the file..... any suggestions? I've tried placing the file in the same folder as "UserAPI.h" [or whatever it's called], but to no result.