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Re: can't read sequential files


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.
> 
> 
> 
> 

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