http://www.perlmonks.org?node_id=518788

This is my Merry Christmas contribution for all of you. First I wanted to post it to the poetry section. It is our beloved Christmas poem since 1988. If you have problems copy-pasting it, download it directly.

Trivia: run this program in three (3) different programming languages, and get three slightly different output!

#include <stdio.h> #define q char w=0,v[]= q("@n'+,#'/*{}w+/w#cdnr/+,{}r/*de}+,/*{*+,/w{%+,/w#q#n+,/#{l,+,/n{n+,/ ++#n+" ",/#;#q#n+,/+k#;*+,/'r :'d*'3,}{w+K w'K:'+}e#';dq#'l q#'+d'K#!/+k#;q#' +r}eK" "K#}w'r}eKK{nl]'/#;#q#n'>{>#}w'>{>{nl]'/+#n';d}rw' i;# >{nl]!/n{n#'; r +{#w'" "r nc{nl]'/#{l,+'K {rw' iK{;[{nl]'/w#q#n'wk nw' iwk{KK{nl]!/w{%'l##w#' + i; " ":{nl]'/*{q#'ld;r'}{nlwb!/*de}'c ;;{nl'-{}rw]'/+,}##'*}#nc,',#nw]'/+kd +'+e}" "+;#'rdq#w! nr'/ '> }+}{rl#'{n' '># }'+}##<!!/"),s #define dducfirstde ;static int f(int t,int _,char*a){return!0<t?t<3?f +(-79, #define lt -13,a+f(-87,1-_,f(-86,0,a+1)+a)):1,t<_?f(t+1,_,a):3,f(-94,- +27+t, #define s a)&&t==2?_<13?f(2,_+1,"%s %d %d\n"):9:16:t<0?t<-72?f(_,t,v): +t<-50 #define ici ?_==*a?putchar(31[a]):f(-65,_,a+1):f((*a=='/')+t,_,a+1):0< +t?f(2 #define length ,2,"%s"):*a=='/'||f(w,f(-61,*a,"!ek;dc i@bK'<q>-[w]*%n+ +r3#l" #define mysweetdiego ",{}:\nuwloca-O;m .vpbks,fxntdCeghiry"),a+1);}int + main #define cmp(s) (int t,char**_){struct w{int v;};if(sizeof(w)>1){v[111] +='d'; #define cos(u) (137)v[112]='n',v[113]=';',v[114]=':';}return!f(t,_?0:0 +,0);} dducfirstde lt s ici length mysweetdiego cmp(s ror study biconverge an +d s l lleg and s fd fdo do reverse foo xor s go dog chr reverse ord srand hy +perge and s eselcfirstexesee)if cos(s e e q dISWcJyccBWXJKcjBTocVUFEYcCUJWcD +ooYLW cWLoUccIEYVcTNTVLPyTcoPooQVXcLcRooVEYmTTTNTcLPREcocWoPYCcnQFKHCocEhcVM +cooQt ctUPcAWWKroCoBLcPcLcAlUToCbcWoTLVYNoREcLcToctYzoooTcoKocMcUTCKJoCDUUoc +VMURI gMLSahOXDTcococaAQAoCKBcQoocozfkIITnPikugLocvccCoBGYiTTPcXcoimVuIDfavH +lKHVX cokTPUooKgUYVoXVVxSjIAPmKUNbuocoPcBcYXUcVPkcoTcocVbPHoQTUOGxufBooTcmBF +oVKPY loFcccXcoDmcvIOMMDOGmSBQovoTTBolPycPAoVVnKUIItTwBnYroocTTVccoKCcVoKloc +rIrCf SBzgCocDJQRcccoVVzcQCUBxpioOLMsYZYucYoTTjWCoVoYHPTcBbxjoriLxGkaQcccycc +cLTTl UcNTBocoVUtuINkOxXCGOYvccJcCcUoobccLYroTcJtoooTtococzoEngovuncDNgooctc +oOLXV mVmZoTCETcYoARclVQBTVoQoLcYHVcmkjhFjOfoWTocPVmoocWoLoccJMLYWOLsMBvFiMZ +IHXNo VochoRcTooJooCoLWuskMhhgIKPTooocZZocXTTYoqcoWWaKSqmCgZoPVmWcVcQokUTWot +oNXWP uGvIqPaowkBocXcoTToLToooVVIcoqAnzzhigoTVohVVoUUQoBAcpccPooMVoGToDYQqqp +pyIjp NoVXScXUFovKoocUbLcVQTWNgbuHtioHsTocoRccoGcTXoocKTVocjgEpHDBloWcoEVVoH +oocDc goUoWTVVTcEYBPnKpaoIFVVVXAcHbcoTocoAVTNTToftfXPmiiOopuaoVXccooUjcoocUc +JUkTN cTFEXuVVmoUlWorTccoloGcTBoPooLcUlKoUcoXoYokocaAooTgPqTYLmcwJoVXocvmtJC +jpcEo TTOorccVococoMoocTErPcVocqYEcVQoYcccocoKvoooQKuYcoQoloECoWojooQoofocWR +ooJLc coojOIQcWohrdemix)