Re: while-question

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On Mon, 2008-11-17 at 14:54 +0000, Stut wrote:
> On 17 Nov 2008, at 14:31, Nathan Rixham wrote:
> > if you really want a challenge try this one..
> >
> > task: add the numbers 5 and 17 together, using php, without using  
> > the + operator. fill it in:
> >
> > function add($a , $b) {
> > //code here but no + - / * operators
> > return $answer;
> > }
> >
> > echo add(5, 17);
> 
> Elemental my dear Mr Rixham...

What level is that elemental?

> function add($a , $b)
> {
>    $answer = $a ^ $b;
>    while (0 != ($a & $b))
>    {
>      $b = ($a & $b) << 1;
>      $answer = $answer ^ $b;
>    }
>    return $answer;
> }

He only said you couldn't use the + operator... nothing was said about
using the - operator.

    $total = -(-5 - 17);

Cheers,
Rob.
-- 
http://www.interjinn.com
Application and Templating Framework for PHP


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