Le 27/01/2012 17:14, Willem Jan Palenstijn a écrit :
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.
I added a few "unsigned" keywords here and there and got the test right!
I'll open a ticket with a nice patch as soon as I'll have cleaned things
a little.
Thanks for the help!
Snark on #sagemath
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