From: pdovera <pdovera@bmind.it>
To: C-16 <pmr17184@students.fct.unl.pt>, linux-c-programming@vger.kernel.org
Subject: Re: #include problem
Date: Fri, 15 Oct 2004 19:04:29 +0200 [thread overview]
Message-ID: <4170031D.4010309@bmind.it> (raw)
In-Reply-To: <200410151648.i9FGmlqM026477@students.fct.unl.pt>
C-16 wrote:
>Howdy,
>i have a file main.c in my program that needs to include four headers
>aaa.h , bbb.h ,ccc.h and ddd.h . Each one of these headers need to
>include another header xxx.h . With this implementation i get a
>"redefinition" compilation error. How can i solve this problem ? Thanks
>in advance.
>-
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>
>
>
Hi,
If I understand well the redefinition problem is generated by xxx.h, so
you need to include xxx.h only once.
into each file aaa.h, bbb.h, ccc.h, try the following code:
#ifndef xxx_h
#include "xxx.h"
#endif
so you will include xxx.h only once !
xxx_h will not be included only the first time, the second time the
ifndef will be false (since xxx.h is already included) and so on ...
Ciao,
Paolo Dovera
next prev parent reply other threads:[~2004-10-15 17:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-15 16:48 #include problem C-16
2004-10-15 17:04 ` Eric Bambach
2004-10-15 17:04 ` pdovera [this message]
2004-10-15 17:12 ` Eric Bambach
2004-10-15 21:15 ` Jan-Benedict Glaw
2004-10-18 7:03 ` Ranga Makireddy
2004-11-07 3:39 ` Wayne Wu
-- strict thread matches above, loose matches on Subject: below --
2004-10-15 16:55 Huber, George K RDECOM CERDEC STCD SRI
2004-10-15 17:29 C-16
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