On Fri, Jan 27, 2012 at 05:07:56PM +0100, Julien Puydt wrote:
> Le 27/01/2012 17:02, Julien Puydt a écrit :
> >Le 27/01/2012 16:52, Willem Jan Palenstijn a écrit :
> >>Is char signed or unsigned on your platform?
> >
> >Good question ; how do I find out?
> 
> If I put the following in test.c :
> 
> #include <limits.h>
> #include <stdio.h>
> 
> int
> main()
> {
>   printf ("%d\n", CHAR_MIN);
>   return 0;
> }
> 
> 
> then compile and run it, I get 0 ; so I guess it's unsigned.

Indeed. That will mean that the initialization of neighborhoods to (char)-1
will have the effect that the check

    if neighborhoods[current] < 0:

fails because (char)-1 is positive, which will no doubt cause the algorithm to
break completely.

-Willem Jan

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