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.
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