[Dev-C++] RES: Programming with multiple modules/files

[<and...@su...>]

Thank you!

   But, I forgot to tell that:
The "other.c"-type files also make
references to the global variables and
they also call functions that belong to
other "other.c"-type files.

In other words:
///main.c///////
#include "global.h"
main()
{
    func_1();
    a = 100;
    func_2();
    func_3()
    ...
 }
///module1.c///////
 extern int a;
 extern int b;
 extern int c;
 func_1()
 {
    a=300;
    ...
 }
///module2.c///////
 extern int a;
 extern int b;
 extern int c;
 extern func_1();
 func_2()
 {
    a=300;
    func_1();   // see this!
    ...
 }
///module3.c///////
 extern int a;
 extern int b;
 extern int c;
 extern func_1();
 func_3()
 {
    a=300;
    func_1(); // see this!
    ...
 }
///global.h///////
int a;
int b;
int c;
void func_1(void);
void func_2(void);
void func_3(void);
/////////////

   Yes, I could improve the flexiblity of these functions
using parameter-passing. But, is there anything that I
can do to avoid these "extern" declarations in the modules?

Regards
Andre


-----Mensagem original-----
De: Per Westermark [mailto:pw...@ia...]
Enviada em: sábado, 13 de outubro de 2007 09:33
Para: André Macário Barros
Cc: dev...@li...
Assunto: Re: [Dev-C++] Programming with multiple modules/files


//global.h
#ifndef _GLOBAL_H
#define _GLOBAL_H

#ifdef MAIN
  #define EXTERN
#else
  #define EXTERN extern
#endif

EXTERN int a;
EXTERN int b;
...

#endif // _GLOBAL_H

// main.c
#define MAIN		// Want all global variables in this file.
#include "global.h"

int main(void) {
    ...
}

// other.c
#include "global.h"	// Get info about all global variables

/pwm

On Sat, 13 Oct 2007, André Macário Barros wrote:

> Dear users,
>
>    Please consider the following project-file
> cenario:
> ///file1.c///////
> #include "global.h"
> main()
> {
>    func_x();
>    a = 100;
>    ...
> }
> ///file2.c///////
> extern int a;
> func_x()
> {
>    ...
>    a=300;
> }
> ///global.h///////
> int a;
> void func_x(void);
> ///////////
>
> My problem is:
>    1) I have a lot of file2.c-type files (files with only
>       function definitions), a lot of functions
>       and several "extern" variable declarations;
>    2) Trying to include global.h in file2.c too, avoids
>       the need of declaring all extern variables. But this
>       action generates warnings of duplicate includes (2 or
>       more include global.h);
> My question is:
>    Is there any way to manipulate several file2.c-type files
> without declaring each extern variable?
>
> Regards
> Andre Barros
>
>
>
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