Re: ROT13 (was Re: [req] Lips / Kiss)

Hilton Janfield wrote:
> 
> [from alt.ascii-art "discussion" on what to do when your newsreader
> doesn't support ROT13]
> 
> >3. Use this C program:
> >
> >#include <stdlib.h>
> >#include <stdio.h>
> >
> >main()
> >{
> >  int ch;
> >
> >  while ((ch = getchar()) != EOF)
> >    {
> >      if ((ch >= 65) && (ch <= 90))
> >        {
> >          ch = 65 + ((ch - 65) + 13) % 26;
> >        }
> >      if ((ch >= 97) && (ch <= 122))
> >        {
> >          ch = 97 + ((ch - 97) + 13) % 26;
> >        }
> >      printf("%c", ch);
> >    }
> >}
> >
> >>[from a reply]
> >>Or use this code:
> >>
> >>#include <stdio.h>
> >>#define rot13(c)
> >>(((c>64)&(c<91))?(65+(c-52)%26):((c>96)&(c<123))?(97+(c-84)%26):c)
> >>void main() {int i; while ((i=getchar())!=-1) putchar(rot13(i));}
> >
> > 4. Write your own program, in your favourite programming language.
> 
> Hmm... well, lets see here... as I recall, ROT13 is a simple
> transposition of A-M and N-Z...
> Here's a little Pascal for ya all! :)
> Reads in a line
> 
> program ROT13;
> 
> var
>   s: string;
>   x: byte;
> 
> begin
>   write('Enter the string to do a ROT13 on: ');
>   readln(s);
>   for x := 1 to length(s) do
>     case s[x] of
>       'A'..'M', 'a'..'m': inc(s[x], 13);
>       'N'..'Z', 'n'..'z': dec(s[x], 13);
>     end;
>   write('ROT13 string: '); writeln(s);
> end.
> 
> Or, if your a tightcoder <G>
> 
> program ROT13;var s:string;x:byte;begin write('Enter the string to do a
> ROT13 on: ');readln(s);for x:=1 to length(s) do case s[x] of
> 'A'..'M','a'..'m':inc(s[x],13);'N'..'Z','n'..'z':dec(s[x],13);end;write('ROT13
> string: ');writeln(s);end.



Excuse my ignorance but what is so special about ROT13? Why is it in
this newsgroup and who uses it?

These are serious questions. I'm not being sarcastic....yet.

Thanks

Donovan

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