Thread: variables in 1 header, accessible to different c files

Hi,

I have a header (call it a.h) file where I declare some variables, such as an int. For example

Code:

int ranks;

I have a .c file (call it a.c) that implements the function prototypes of that header file. It also uses those variables for different reasons.

In another .c file (call it b.c), I include a.h and and include the a.o when i'm linking.

now, in b.c I want to assign a value to this variable ranks (found in a.h) simply by doing

Code:

ranks = total_ranks;

or something like that. However, when running the code and printing, total_ranks is correct (say 10), but ranks is always 0 when printed in a.c.

Where should I put this int ranks ??

Thank you!

Got it... in a.h I have to do

Code:

extern int ranks;

and in the a.c I have to do

Code:

int ranks;

Now it's accessible. thank you!!

You are correct. thanks so much!