can't read sequential files

Thu Nov 1 06:43:00 GMT 2007

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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