Can I access functions within another C program?

[wiggy]

Hello!

I am new to this site and very new to C programming.

I am writing a basic GUI in Turbo C which I can do with relative ease.
However, our teacher has given us a C file whichwhen run, can control things on a circuit board. My GUI runs fine, and the the teachers program runs fine aswell.
However, what I want to do is to be able to call functions in his file (e.g. heater_on() ) from within MY C file, but am not sure if this is possible.

I know that to include certain functions in a program one must use header files, but is it possible to use another C program and not a header? I have scoured the web but cannot find an answer!

Thank you for your help and apologies if I'm asking a silly question!

Thanks,

- Wiggy -

[horace1]

there are a number of ways you can do this

(1) copy the source code of the functions you require into the file containing your program

(2) include the c file, e.g. assuming the functions you need are in a file called heater.c
#include "heater.c"

(3) the preferred way: include the header file (assuming your lecturer has provided one), e.g.
#include "heater.h"
and add the header.c file to the project so it is linked to your program when the project is built.

your lecturer should give you some guidance

unless you are thinking of RPC (remote Procedure Call)
http://en.wikipedia.org/wiki/Remote_procedure_call

[wiggy]

Ok, thanks for your help. I shall talk to my lecturer.

Regards.