Subj : Re: Reversing a number
To   : comp.programming
From : Rob Thorpe
Date : Tue Sep 13 2005 03:42 pm

Gerry Quinn wrote:
> In article <4326BFE2.2775@mindspring.com>, pfiland@mindspring.com
> says...
> > Rob Thorpe wrote:
> > > Willem wrote:
> > > > Roger wrote:
> > > > ) "Irrwahn Grausewitz" <irrwahn35@freenet.de> wrote in message
<snip>
> >
> > #include <stdlib.h>
> > #include <limits.h>
> >
> > int revdecimal(int number);
> > void itoa_r(int n, char *s);
>
> Depends on the language.  E.g. Blitz Basic 3D:
>
> Function GetReverse( x )
> 	a$ = x
> 	For i = Len( a$ ) To 1 Step -1
> 		b$ = b$ + Mid$( a$, i, 1 )
> 	Next
> 	return b$
> End Function
>
> (This language can automatically cast between integers and their
> decimal string representations.)

In lisp dialects it's even simpler, in Common Lisp for example:
(read-from-string (reverse (write-to-string a)))

It's fairly simple in C though.

.