Usando due lingue a tua scelta, scrivi il più piccolo " quine reciproco " che puoi.

Ossia, scrivi un programma P nella lingua A che emette il codice sorgente per un programma Q nella lingua B, in modo tale che l'output del programma Q sia identico al codice sorgente per P.

I file vuoti non contano, né i programmi in stile "leggi il file sorgente e stampalo".

Modifica: le risposte con P = Q non contano più.

> <> (Fish) e Python - 26 caratteri

"00gr00g:a9*2+$' tnirp'>o<

Genera questo Python

print "\"00gr00g:a9*2+$' tnirp'>o<"

Python e Ruby, 39 personaggi

Questo frammento di Python

s='puts %%q{s=%r;print s%%s}';print s%s

genera questo snippet di Ruby

puts %q{s='puts %%q{s=%r;print s%%s}';print s%s}

che quindi genera di nuovo lo snippet Python iniziale:

$ diff -s mutualquine.py <(ruby <(python mutualquine.py))
Files mutualquine.py and /dev/fd/63 are identical

Nota che questo è simile alla risposta di JB .

C e Perl, 73

Questo C:

main(s){printf(s="print q<main(s){printf(s=%c%s%c,34,s,34);}>",34,s,34);}

... genera il seguente Perl:

print q<main(s){printf(s="print q<main(s){printf(s=%c%s%c,34,s,34);}>",34,s,34);}>

... che restituisce la C indietro.

C e C ++, 123 caratteri

Questo C (compilabile con gcc v4.3.4):

#include <stdio.h>
main(){char *c="#include <stdio.h>%cmain(){char *c=%c%s%c;printf(c,10,34,c,34);}";printf(c,10,34,c,34);}

genera questo C ++ (identico) (compilabile con g ++ 4.3.4, un avviso):

#include <stdio.h>
main(){char *c="#include <stdio.h>%cmain(){char *c=%c%s%c;printf(c,10,34,c,34);}";printf(c,10,34,c,34);}

Questo è all'interno delle regole come pubblicato. : P E, come quello di Ventero, questo si basa sulla risposta di JB .

Java a Python - 219

Giava:

class Q{public static void main(String[]a){char q=34,c=39;String s="print%sclass Q{public static void main(String[]a){char q=34,c=39;String s=%s%s%s;System.out.printf(s,c,q,s,q,c);}}%s";System.out.printf(s,c,q,s,q,c);}}

Pitone:

print'class Q{public static void main(String[]a){char q=34,c=39;String s="print%sclass Q{public static void main(String[]a){char q=34,c=39;String s=%s%s%s;System.out.printf(s,c,q,s,q,c);}}%s";System.out.printf(s,c,q,s,q,c);}}'

Fa uso del fatto che Python consente le 'stringhe; questo rende molto più semplice scrivere la fonte del programma java nel programma python.

Python + Piet one-liner: 417 caratteri + 7391 7107 codici di esecuzione

Questo script Python produce un'immagine 7393 x 2; il blocco 2x2 più a destra di cui è una "sentinella" che termina il programma; quindi non sto contando quelli; e la seconda riga è altrimenti bianca. Probabilmente posso golf ulteriormente il codice piet usando catene di addizione / sottrazione / moltiplicazione invece dell'algoritmo binario ingenuo ... ma non voglio dare una soluzione a un puzzle futuro.

Non pubblicherò qui l'immagine, a causa delle sue dimensioni ridicole. Se vuoi vederlo, esegui il codice Python e convoglia l'output in un file .ppm. Quindi, converti .ppm in .gif ed esegui l'output su Rapapaing . (in alternativa, utilizzare un interprete Piet non web che groks .ppm)

A='P=lambda A:reduce(lambda(D,H,B),P:(D[P/3:]+D[:P/3],H[P%3*2:]+H[:P%3*2],B+"".join("%i "%H[(D[0]/P)%2]for P in[1,2,4])),map(" A !        @    B".find,A),([1,3,2,6,4,5],[0,192,192,255,0,255],"P3 %i 2 255 "%(len(A)+2)))[2]+"255 "*4+"0 0 "+"255 "*len(A)*3+"255 0 0 "*2;B=lambda D:["@!%s","@@!%s!"][D%2]%B(D/2)if 1<D else"";print P("".join("A%sB"%B(ord(D))for D in"A=%s;exec A[:-13]"%`A`)+" ");exec A[:-13]';exec A[:-13]

modifica: golf un po 'il piet riducendo il peso di Hamming di nomi di variabili.

meno pre-quine golfed :

Questa è una versione precedente, prima che mi rendessi conto che avrei potuto farne una linea. È leggermente più facile da capire. La funzione P traduce un'istruzione speciale impostata in Piet; e la funzione p accetta un numero intero e produce una sequenza di istruzioni per creare quel numero intero nello stack. Sto solo usando le istruzioni =,+,:,|, quindi probabilmente questo potrebbe essere reso più efficiente ... ma un po 'mi piace avere un compilatore Piet completo (di sorta) nel sorgente.

s="""def P(s):
 l=len(s)+1;R="P3 %i 2 255 "%(l+2);C=[1,3,2,6,4,5];V=[0,192,192,255,0,255]
 for x in map("=|^+-*/%~>.,:@$?#!".find,"="+s):
  C=C[x//3:]+C[:x//3];V=V[x%3*2:]+V[:x%3*2]
  for i in [1,2,4]:R+="%i "%V[(C[0]//i)%2]
 return R+"255 "*4+"0 0 "+"255 "*l*3+"255 0 0 "*2
p=lambda x:[":+%s","::+%s+"][x%2]%p(x/2)if x/2 else""
print P("".join("|%s!"%k(ord(c))for c in "s="+`s`+";exec s[:-13]"))
exec s[:-13]"""
exec s[:-13]

/Brainf..k/, 6988 byte

Brainfuck

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Provalo online!

Brain-Flak

(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()())(())(()())(()()()()()())(())(())(())(())(())(()())(())(()())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(())(())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(())(())(())(()())(())(()())(())(()())(())(()())(())(()())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()())(()())(())(()()()()()())(()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()())(())(()())(()()()()()()()()())(()())(()()()()()())(()()()()()()())(())(())(())(())(())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(())(())(())(())(()()()()()()()()()())(()()()()()()()()()()())(()())(())(())(())(())(()())(())(()())(())(()())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(())(()()()()()()()())((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<++>-[<++>-[<+>-[<++++++++++++++>-[<++>-[<+++++++++++++++++++++++++++++>-[<++>-[<++++++++++++++++++++++++++++++>-[<++>-]]]]]]]]]]<.>>>>]}{}<>

Provalo online!

Brain-Flak potrebbe andare in timeout su TIO.

Spiegazione

Prossimamente.

Ruby and Python (393 + 413 = 806 caratteri)

Leggero cambiamento di questa mia risposta . Potrebbe sicuramente essere ridotto poiché ho appena codificato l'input senza alcuna ottimizzazione.

Ruby (393 caratteri)

require 'json';s=%q[{"ruby":[" %q[","require 'json';s=##;j=JSON.load s;puts j[l='python'][1].sub('##',j[l][0].delete(' ')+s+j[l][2].delete(' '))"," ]"],"python":["' ''","import json,re;s=##;j=json.loads(s);l='ruby';print(re.sub('##',j[l][0].replace(' ','')+s+j[l][2].replace(' ',''),j[l][1],1))","' ''"]}];j=JSON.load s;puts j[l='python'][1].sub('##',j[l][0].delete(' ')+s+j[l][2].delete(' '))

Python (413 caratteri)

import json,re;s='''{"ruby":[" %q[","require 'json';s=##;j=JSON.load s;puts j[l='python'][1].sub('##',j[l][0].delete(' ')+s+j[l][2].delete(' '))"," ]"],"python":["' ''","import json,re;s=##;j=json.loads(s);l='ruby';print(re.sub('##',j[l][0].replace(' ','')+s+j[l][2].replace(' ',''),j[l][1],1))","' ''"]}''';j=json.loads(s);l='ruby';print(re.sub('##',j[l][0].replace(' ','')+s+j[l][2].replace(' ',''),j[l][1],1))

Python 2 a Befunge 98, 94 78

Ancora una volta, facendo uso dei due modi di Python di creare stringhe:

Pitone:

s='<@,kM%c%cs=%c%s%c;print s%%(39,34,39,s,39,34)%c';print s%(39,34,39,s,39,34)

Befunge 98:

<@,kM'"s='<@,kM%c%cs=%c%s%c;print s%%(39,34,39,s,39,34)%c';print s%(39,34,39,s,39,34)"

Il programma python formatta la stringa per includere se stessa e i caratteri per la virgoletta singola e doppia.

Il programma Befunge funziona in questo modo:

• <: spostati a sinistra e avvolgilo. Quindi ora eseguiamo i comandi da destra a sinistra

• ": fai in modo che ogni carattere che incontriamo venga messo in pila fino a quando non ne incontriamo un altro " , quindi spingiamo:

  )43,93,s,93,43,93(%s tnirp;'c%)43,93,s,93,43,93(%%s tnirp;c%s%c%=sc%c%Mk,@<'=s
  

  Che in realtà è solo il programma Python, invertito a causa del modo in cui Befunge stampa (che è un ciclo pop + print)

• 'M: spingi Mnello stack. Mè anche il numero 77, che è uno in meno del numero di caratteri inseriti nello stack dal" s.
• k: estrae il valore più alto dallo stack (M ) ed esegue l'operazione successiva più volte, più una.
• ,: estrae il valore più alto dallo stack e stampa il carattere.
• @: termina il programma.

Sottocarico e Betaload , 16 byte (non concorrenti)

Sotto carico:

(a(:^)*a(S)*S):^

Betaload:

((a(:^)*a(S)*S):^)S

Betaload è un superset di Underload, quindi potrebbero essere due risposte Underload.

Questo non è competitivo perché Betaload è stato creato dopo che questa sfida è stata pubblicata.

Clipper e C (111 + 108 = 219 caratteri)

Clipper (111)

?'char*f="%c%cchar*f=%c%s%c;main(){printf(f,63,39,34,f,34,39,10);}%c%c";main(){printf(f,63,39,34,f,34,39,10);}'

C (108)

char*f="%c%cchar*f=%c%s%c;main(){printf(f,63,39,34,f,34,39,10);}%c%c";main(){printf(f,63,39,34,f,34,39,10);}

Questo è un po 'un cop-out perché:

1. il comando "stampa" in Clipper è davvero semplice: ?'foo':-)
2. L'ho basato sul quine "classico C" di http://www.nyx.net/~gthompso/quine.htm , con alcune modifiche da spremere negli ?e '.
3. Non l'ho fatto #include <stdio.h>, quindi dà un avviso al compilatore
4. Il codice C prodotto dalla versione Clipper doveva essere elaborato per rimuovere un'interruzione di linea che era stata introdotta da un limite di colonna di 80 caratteri nel mio terminale o nella routine di stampa Harbour o qualcosa del genere.

Python e ~ - ~! - 77 e 81 = 158

Questo codice Python:

q=chr(124);s='@%sq=chr(124);s=%s;print(s%%repr(s))%s:';print(s%(q,repr(s),q))

genera questo ~ - ~! codice:

@|q=chr(124);s='@%sq=chr(124);s=%s;print(s%%repr(s))%s:';print(s%(q,repr(s),q))|:

Può sicuramente essere migliorato molto e adotta un sacco di altre risposte.

Javascript e Windows .bat (71 e 81)

f=()=>{console.log('echo f='+(f+';f()').replace(/(?=[>^\\])/g,'^'))};f()

e

echo f=()=^>{console.log('echo f='+(f+';f()').replace(/(?=[^>^^^\^\])/g,'^^'))};f()