X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Message-ID: <13524102.post@talk.nabble.com>
Date: Wed, 31 Oct 2007 23:43:21 -0700 (PDT)
From: zirtik <banabulasma AT gmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: can't read sequential files
In-Reply-To: <13500536.post@talk.nabble.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Nabble-From: banabulasma AT gmail DOT com
References: <13500536 DOT post AT talk DOT nabble DOT com>
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com


After adding the line:


	if (fp==NULL)
	{
	   printf("error, NULL pointer!\n");
	   return(1);
	} 

and then rebuilding the code, everything worked. But it's strange that if I
delete that code segment and never check whether the fp pointer is NULL or
not, I always get a segmentation fault. Can this be some kind of an
optimization problem? I don't know why it happens. Thank you for the
comments. 


zirtik wrote:
> 
> Hi, I'm using cygwin and windows XP together with Eclipse IDE and CDT. I
> have a following piece of code:
> 
> ....
> 
> 	int i;
> 	fp = fopen ("phi.txt","r");
> 	
> 	for( i = 0; i < 51; i++ ) {
> 		fscanf(fp, "%d\n", &original_phi[i]);	
> 	}
> 
> ...
> 
> and when I try to compile it, it compiles well, but when I try to run it I
> get the following error message:
> 
> 655 [main] Genetics 3012 _cygtls::handle_exceptions: Exception:
> STATUS_ACCESS_VIOLATION
> 2540 [main] Genetics 3012 open_stackdumpfile: Dumping stack trace to
> Genetics.exe.stackdump
> 
> I added the following line to check if fp is always NULL:
> 
> if (fp==NULL)
> {
>    printf("error, NULL pointer!\n");
>    return(1);
> }
> 
> and it is always NULL. I put the "phi.txt" in the same directory as the
> executable so it is in:
> 
> ....\ProjectFolder\Debug  
> 
> folder as well as in
> 
> ....\ProjectFolder\src
> 
> folder. I still keep getting the same error. I added the current directory
> "." to the PATH but it didn't help. This code used to run on another PC
> with Eclipse and cygwin again but this is the first time I am having
> problems with it on a different machine. Any help would be greatly
> appreciated. 
> 
> Thanks.
> 
> 
> 
> 

-- 
View this message in context: http://www.nabble.com/can%27t-read-sequential-files-tf4722128.html#a13524102
Sent from the Cygwin list mailing list archive at Nabble.com.


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/