my main c file is getting bigger, how could I split it to multi files and include them in main c file?
http://forum.arduino.cc/index.php/topic,130895.0.html
after read this I still don't understand.
for example I have a sketch abc, which is in a folder abc/
I want my abc sketch include "a.h" and I want a.h also in folder abc/
I even could not create a.h
help me.