Subj : Re: Reversing a number
To   : comp.programming
From : Willem
Date : Mon Sep 12 2005 09:15 am

Rob wrote:
) Willem wrote:
)> Roger wrote:
)> ) "Irrwahn Grausewitz" <irrwahn35@freenet.de> wrote in message
)> ) news:shv7i1p3on0qpsr2rumeifst69o8tjtp32@4ax.com...
)> )> But why treat the first iteration as a special case?
)> )> Just replace the two lines above with:
)> )>
)> )>     int n = 0;
)> )>
)> )>>    while (i)
)> )>>    {
)> )>>        n *= 10;
)> )>>        n += i % 10;
)> )>>        i /= 10;
)> )>>    }
)> )>>    return n;
)> )>>}
)> )
)> ) Then reverse(10000) is (1).
)>
)> Of course it is; the function returns an integer, after all.
)
) I think the OP means a number in the mathematical sense of the word.
) ie:-
)
) 1 -> 1
) 21 -> 12
) 5634 -> 4365

And what, pray tell, would be the reverse of 10000, as a number in the
mathematical sense of the word ?

) As Jerry Quinn pointed out it's simplest to convert it to a string then
) reverse it and convert it back again.

That can only be simplest if 'convert to a string' is considered a simple
operation.  Otherwise the above piece of code is simpler.


SaSW, Willem
-- 
Disclaimer: I am in no way responsible for any of the statements
            made in the above text. For all I know I might be
            drugged or something..
            No I'm not paranoid. You all think I'm paranoid, don't you !
#EOT

.