I have made a program for my AT89S53 in keil 'C' and started off having all of the functions that I have created in the same C file.

I then decided to put all of the functions in their own header files. However, when I try to compile, it wont give an error. When i run the debug, it shows the program going crazy as soon as it comes across a call to a function.

I have tried to put the prototyes for the functions in the main c file and have included the headers but still no luck.

How should I be declaring these functions in header files correctly?