Problem to define a struct

Question

I am doing a little application in C and I want to define a struct. I have done this :

typedef struct {
    ITEM element[TAILLE_TAMPON];
    sem_t mutex, attendreVide, attendrePlein;
    int ptEntree, ptSortie;
} TAMPON;

but I have an error when I built my project with ITEM Is it due to a problem with the include ?

stdio.h
stdlib.h
time.h
semaphore.h
pthread.h
"psleep.h"

"psleep.h" include "unistd.h"

Thank you for your help.

You should include the error of which you speak.

dwc
– dwc

2009-05-31 15:59:39 +00:00
Commented May 31, 2009 at 15:59 — dwc
– dwc, Commented May 31, 2009 at 15:59
How have you declared the ITEM type?

Alex Martelli
– Alex Martelli

2009-05-31 16:01:06 +00:00
Commented May 31, 2009 at 16:01 — Alex Martelli
– Alex Martelli, Commented May 31, 2009 at 16:01
So tempted to add the tag "tampon"

Nosredna
– Nosredna

2009-05-31 16:17:20 +00:00
Commented May 31, 2009 at 16:17 — Nosredna
– Nosredna, Commented May 31, 2009 at 16:17

Nathaniel Flath · Accepted Answer · 2009-05-31 19:22:40Z

4

It sounds like in one of your headers the ITEM type was declared, although you need to give more information to be sure. Check to make sure you #include the file that defines the ITEM struct.

edited May 31, 2009 at 19:22

answered May 31, 2009 at 16:01

Nathaniel Flath

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Comments

Phil Miller · Accepted Answer · 2009-05-31 16:03:18Z

2

No, it's not due to the includes at all. Given what you've shown us, it's due to ITEM not being a defined type.

answered May 31, 2009 at 16:03

Phil Miller

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2 Comments

Nathaniel Flath Over a year ago

well, yes, it's probably due to ITEM not being a defined type...because he didn't include where it was defined.

Michaël Over a year ago

My error come from the definition of ITEM. I forgot to make a typedef enum {...} ITEM; I thought that it was a problem with the struct. Thank you for your help.

Nosredna · Accepted Answer · 2009-06-01 19:04:03Z

0

ITEM should be declared before the TAMPON. Did you perhaps try to declare it after the TAMPON?

Be sure that your include order guarantees that struct types you need to define other structs are brought in before the structs that refer to them. For example, if you have a BOX_OF_TAMPONS struct that uses TAMPON, you'd declare BOX_OF_TAMPONS after TAMPON.

edited Jun 1, 2009 at 19:04

answered May 31, 2009 at 16:12

Nosredna

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