[chbot] !!!!!!!! Choc fish challenge 2 !!!!!!!!!

[Mark Atherton]

Hi Andre,

returns 1

Haven't seen you for years, hope you are well.

Regards,

Mark Atherton

At 04:09 p.m. 1/08/2011, you wrote:
>To make up for my massive blunder, I'll offer a replacement fish for an
>explanation of what the following algorithm does. We'll go with the same
>timeframe as before, and I'll endeavor not to reply myself.
>
>unsigned int function(unsigned int x)
>{
>   x--;
>   x |= x >> 1;
>   x |= x >> 2;
>   x |= x >> 4;
>   x |= x >> 8;
>   x |= x >> 16;
>   return x + 1;
>}
>
>Regards,
>Andre
>
>On 01/08/11 15:54, Mark Beckett wrote:
> > And I thought I had trouble reading
> >
> > This time the first correct answer after  8pm on Tuesday will win.
> >
> >
> > Mark
> >
> >
> >
> > On 1/08/11 14:57, Andre Renaud wrote:
> >> Hi Charles,
> >>
> >> On 01/08/11 14:13, Charles Manning wrote:
> >>> Under what conditions does the following compile and what will 
> happen when it
> >>> executes?
> >>>
> >>>    while(x[j] == j[x]){
> >>>     j++; x++;
> >>>    }
> >> As far as I can tell, one of x or j has to be an ordinal/integer type.
> >> The other has to be some kind of array type. Since array indexing
> >> essentially becomes addition, x[j] is equivalent to j[x]. I think this
> >> means that it'll run forever.
> >>
> >> However, I'm not entirely convinced that typing of x[j] vs j[x] doesn't
> >> come into it, especially if the one of them that is an array has
> >> sizeof()>  1.
> >>
> >> Regards,
> >> Andre
> >>
> >> _______________________________________________
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> >>
> >
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>
>--
>Bluewater Systems - An Aiotec Company
>
>Andre Renaud
>andre at bluewatersys.com          5 Amuri Park, 404 Barbadoes St
>www.bluewatersys.com            PO Box 13 889, Christchurch 8013
>www.aiotec.co.nz                New Zealand
>Phone: +64 3 3779127            Freecall: Australia 1800 148 751
>Fax:   +64 3 3779135            USA 1800 261 2934
>
>_______________________________________________
>Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>http://lists.ourshack.com/mailman/listinfo/chchrobotics
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>Meetings 3rd Monday each month at Tait Radio Communications, 175 
>Roydvale Ave, 6.30pm
>
>When replying, please edit your Subject line to reflect new content.