Old lady swallowed a fly

From Rosetta Code

Present a program which emits the lyrics to the song I Knew an Old Lady Who Swallowed a Fly, taking advantage of the repetitive structure of the song's lyrics.

Old lady swallowed a fly is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

C

Boring, ad hoc dictionary based decompression. The encoder was arguably more interesting, though. <lang c>#include <stdio.h>

char *dict[] = { "_ha _c _e _p,/Quite absurd_f_p;_`cat,/Fancy that_fcat;_j`dog,/What a hog" "_fdog;_l`pig,/Her mouth_qso big_fpig;_d_r,/She just opened her throat_f_" "r;_icow,/_mhow she_ga cow;_k_o,/It_qrather wonky_f_o;_a_o_bcow,_khorse.." "./She's dead, of course!/","_a_p_b_e ","/S_t "," to catch the ","fly,/Bu" "t _mwhy s_t fly,/Perhaps she'll die!//_ha","_apig_bdog,_l`","spider,/Tha" "t wr_nj_ntickled inside her;_aspider_b_c",", to_s a ","_sed ","There_qan" " old lady who_g","_a_r_bpig,_d","_acat_b_p,_","_acow_b_r,_i","_adog_bcat" ",_j","I don't know ","iggled and ","donkey","bird"," was ","goat"," swal" "low","he_gthe" };

int print(char *c, int s) { do { if (s) s = print(dict[*c - 95], 0); else if (*c == '_') s = 1; else putchar(*c == '/' ? '\n' : *c); } while (*++c); return s; }

int main() { print(dict[0], 0); return 0; }</lang>


D

Translation of: C

<lang d>import std.stdio;

auto dict = [ "_ha _c _e _p,/Quite absurd_f_p;_`cat,/Fancy that_fcat;_j`dog,/What a hog"~ "_fdog;_l`pig,/Her mouth_qso big_fpig;_d_r,/She just opened her throat_f_"~ "r;_icow,/_mhow she_ga cow;_k_o,/It_qrather wonky_f_o;_a_o_bcow,_khorse.."~ "./She's dead, of course!/","_a_p_b_e ","/S_t "," to catch the ","fly,/Bu"~ "t _mwhy s_t fly,/Perhaps she'll die!//_ha","_apig_bdog,_l`","spider,/Tha"~ "t wr_nj_ntickled inside her;_aspider_b_c",", to_s a ","_sed ","There_qan"~ " old lady who_g","_a_r_bpig,_d","_acat_b_p,_","_acow_b_r,_i","_adog_bcat"~ ",_j","I don't know ","iggled and ","donkey","bird"," was ","goat"," swal"~ "low","he_gthe"];

bool oldLady(string part, bool s) { 

   foreach (ch; part) {
       if (s)
           s = oldLady(dict[ch - 95], 0);
       else if (ch == '_')
           s = true;
       else
           putchar(ch == '/' ? '\n' : ch);
   }

   return s;

}

void main() { 

   oldLady(dict[0], false);

}</lang>

Forth

swallow-addr is obviously a good candidate for an object, but Forth has many OO candidates - we won't settle that argument here.

<lang forth>: string, ( c-addr u -- ) \ store string at HERE , with a count 

 dup c, here swap dup allot move ;

\ doubly linked list: (0|prev, 0|next, aside?, cstr animal; cstr aside) \ aside? is true if the aside is always displayed. variable swallowed variable first

>next ( swallow-addr -- swallow-addr' )
 cell+ @ ;
>aside? ( swallow-addr -- f )
 2 cells + @ ;
>animal ( swallow-addr -- c-addr u )
 3 cells + count ;
>aside ( swallow-addr -- c-addr u )
 >animal + count ;
swallow ( "animal" -- )
 align swallowed @ if here swallowed @ cell+ ! else here first ! then 
 here swallowed @ , swallowed !
 0 , 0 , parse-word string, ; \ data structure still needs the aside
always ( -- ) \ set aside? of last-defined swallow to true
 swallowed @ 2 cells + on ;
aside ( "aside" -- )
 0 parse string, ;

swallow fly always aside But I don't know why she swallowed the fly, swallow spider always aside That wriggled and jiggled and tickled inside her; swallow bird aside Quite absurd, she swallowed the bird; swallow cat aside Fancy that, she swallowed the cat; swallow dog aside What a hog, she swallowed the dog; swallow pig aside Her mouth was so big, she swallowed the pig; swallow goat aside She just opened her throat, she swallowed the goat; swallow cow aside I don't know how, she swallowed the cow; swallow donkey aside It was rather wonky, she swallowed the donkey;

?aside ( swallow-addr -- ) \ print aside if aside? is true
 dup >aside? if >aside cr type else drop then ;
reasons ( swallow-addr -- ) \ print reasons she swallowed something
 begin dup @ while
   dup cr ." She swallowed the " >animal type ."  to catch the "
   @ dup >animal type ." ," dup ?aside
 repeat drop ;
verse ( swallow-addr -- )
 cr ." There was an old lady who swallowed a " dup >animal type ." ,"
 dup >aside cr type
 reasons
 cr ." Perhaps she'll die!" ;
song ( -- )
 first @ begin dup verse cr >next dup 0= until drop
 cr ." There was an old lady who swallowed a horse..."
 cr ." She's dead, of course!" ;</lang>

J

This defines T to be the required text.

<lang j>T=: e=:3 :'T=:T,y,LF' E=:e@,&'.' O=:'I know an old lady who swallowed a 'E@,] I=:e bind('I dont know why she swallowed the fly.',LF,'Perhaps shell die.',LF) I O 'fly' O P=:'spider' E 'That wriggled and jiggled and tickled inside her' I E A=:'She swallowed the spider to catch the fly' N=:4 :0 

 O x
 E y,'. To swallow a ',x
 I E A=:'She swallowed the ',x,' to catch the ',P,'.',LF,A
 P=:x

) 'Bird'N'Quite absurd' 'Cat'N'Fancy that' 'Dog'N'What a hog' 'Pig'N'Her mouth was so big' 'Goat'N'She just opened her throat' 'Cow'N'I dont know how' 'Donkey'N'It was rather wonky' O'Horse' E'Shes dead, of course!'</lang>

PHP

This example is incorrect. Please fix the code and remove this message.

Details: The program does not produce the correct lyrics. (See talk page)

<lang php><?php

$swallowed = array( 

 array('swallowed' => 'fly.',
       'reason' => "I don't know why she swallowed the fly."),
 array('swallowed' => 'spider,',
       'aside' => "which wiggled and jiggled and tickled inside her.",
       'reason' => "She swallowed the spider to catch the fly"),
 array('swallowed' => 'bird.',
       'aside' => "How absurd! To swallow a bird!",
       'reason' => "She swallowed the bird to catch the spider,"),
 array('swallowed' => 'cat.',
       'aside' => "Imagine that! To swallow a cat!",
       'reason' => "She swallowed the cat to catch the bird."),
 array('swallowed' => 'dog.',
       'aside' => "What a hog! To swallow a dog!",
       'reason' => "She swallowed the dog to catch the cat."),
 array('swallowed' => 'horse',
       'aside' => "She's dead, of course. She swallowed a horse!",
       'reason' => "She swallowed the horse to catch the dog."));

foreach($swallowed as $creature) { 

 print "I knew an old lady who swallowed a " . $creature['swallowed'] . "\n";
 if(array_key_exists('aside', $creature))
   print $creature['aside'] . "\n";

 $reversed = array_reverse($swallowed);
 $history = array_slice($reversed, array_search($creature, $reversed));

 foreach($history as $note)
 {
   print $note['reason'] . "\n";
 }

 if($swallowed[count($swallowed) - 1] == $creature)
   print "But she sure died!\n";
 else
   print "Perhaps she'll die." . "\n\n";

}</lang>

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