Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

Brainf*ck interpreter

by Juerd (Abbot)
on Dec 16, 2001 at 22:00 UTC ( #132368=snippet: print w/ replies, xml ) Need Help??

Description: This is an interpreter for the (in)famous, but turing-complete, Brainf*ck programming language.
Update 200112161916+0100: s/f.ck/f*ck/g

#!/usr/bin/perl -s # |bf; bf $file; bf -e=,
$|++;undef$/;$_=$e||<>;tr/-+,.[]<>//cd;for$
a(qw%]} [while($p[$p]){ -$p[$p]-- +$p[$p]++
,$p[$p]=ord(getc) .print(chr($p[$p])) <$p--
>$p++%){s/\Q${\substr$a,0,1}/${\substr$a,1}
;/g}eval; # by Juerd <juerd@juerd.nl>, 2001

2;0 juerd@ouranos:~$ ./bf -e='++++++++[>++++++++<-]+++++[>>+++++<<-]>>
++
[<+.>-]++++++++++.'
ABCDEFGHIJKLMNOPQRSTUVWXYZ

Comment on Brainf*ck interpreter
Select or Download Code
Replies are listed 'Best First'.
Re: Brainf*ck interpreter
by mtve (Chaplain) on May 09, 2002 at 13:34 UTC

    Can't stop after last perlgolf.

    #!/usr/bin/perl -s # |bf; bf $file; bf -e=; $|++;$/=$a;$_=$e||<>;%a=qw%[ while($p[$p]){ , $p[$p]=ord(getc) . print+chr$p[$p] < $p-- > $p++ + $p[$p]++ - $p[$p]-- ] }%;s/./$a{$& };/g;eval

    "Please shoot me" (C) Jay Tilton

    Update on August 10, 2002: another 14 bytes

    #!/usr/bin/perl -s # |bf; bf $file; bf -e=; $_=($/=$e)||<>;$p=w;%a=qw%[ while($$p){ ] } . print+chr$ , $$p=ord(getc); + ++$ - --$ < chop > $p=w.%;$|=s/./$a{$&}\$p;/g;eval

    Update on May 19, 2004: Rick Klement's wonderful solution to PCLP#2.5 Polish golf

    $_.=qw(++ }while$ -- ++$ $$p=shift; --$ print$ ${)[$p%60%8].'$p+0;'while$p=ord getc;eval

      Brainfuck interpreters must discard unknown characters. Yours doesn't.

      - Yes, I reinvent wheels.
      - Spam: Visit eurotraQ.
      

        I think it does - unknown chars are replaced with noop ';'

        Dear Juerd, can I put "(C) Juerd & Mtve" on it?

Back to Snippets Section

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: snippet [id://132368]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others meditating upon the Monastery: (8)
As of 2015-07-30 11:19 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (271 votes), past polls