Thread: variable declaration in H file

hi forum,

i'm new to C and trying to declare some variables to use on global scope a cross .c files. here is a sample of the code:

abc.h:
--------

int rc;

int thinkTime = 5;

string urlName;

char funcLibPath2[] = "C:\\LR_Func";

string testPath3 = "C:\\LR_Func";

-----------

compiler throws all kind of garbage... primerally ' redefinition of <var name> previously defined at <file path>' error messages.

what is wrong with these declarations?

Do you include abc.h in the program more than once? It's a good idea to place inclusion guards in your header files so that there's no way they can be included more than once, even if you try

Code:

#if !defined (HEADER_NAME_H)
#define HEADER_NAME_H

/* Stuff in the header file... */

#endif

Now you can include abc.h any number of times, but it'll only be actually included once.

i probably will go with static declaration to make architecture centralized.

what kind of stuff i can include into header?

also, where would i find good literature about how to in C?

i.e. :
- creating .ini files
- declaring variables
- samples of basic code, etc. - C road map for someone with programming experience to acquire C basics...