Программа-полиморф hello world на 15 языках. Работает в C, C++, Haskell, Ruby, Python, Perl(x2), HTML, tcl, bash, zsh, make, bash и brainfuck. via http://govnokod.ru/1205

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# /* [ <!-- */ include <stdio.h> /* \
#{\
`""""true \\#{"\n#"}; \
\
if [ -n "$ZSH_VERSION" ]; then \
\
echo exec echo I\'m a zsh script.; \
\
elif [ -n "$BASH_VERSION" ]; then \
\
echo exec echo I\'m a bash script.; \
else \
echo exec echo I\'m a sh script.; \
fi`; #\
BEGIN{print"I'm a ", 0 ? "Ruby" :"Perl", " program.\n"; exit; }
#\
%q~
set dummy =0; puts [list "I'm" "a" "tcl" "script."]; exit
all: ; @echo "I'm a Makefile." \
#*/
/*: */ enum {a, b}; \
\
static int c99(void) {
#ifndef __cplusplus /* bah */
unused1: if ((enum {b, a})0) \
(void)0;
#endif
unused2: return a; \
} \
static int trigraphs(void) { \
\
return sizeof "??!" == 2; \
} \
char X; \
\
int main(void) { \
\
struct X { \
\
char a[2]; \
};\
if (sizeof(X) != 1) { \
\
printf("I'm a C++ program (trigraphs %sabled).\n", \
\
trigraphs() ? "en" : "dis");\
\
}else if (1//**/2
)unused3 : { ; \
printf("I'm a C program (C%s, trigraphs %sabled).\n", \
c99() ? "89 with // comments" : "99", \
trigraphs() ? "en" : "dis"); \
} else { \
printf("I'm a C program (C89, trigraphs %sabled).\n", \
trigraphs() ? "en" : "dis"); \
} \
return 0; \
} /*
# \
> main :: IO () -- -- \
> main = putStr "I'm a Literate Haskell program.\n"
# \
]>++++++++[<+++++++++>-]<+.>>++++[<++++++++++>-]<-.[-]>++++++++++ \
[<+++++++++++>-]<-.>>++++[<++++++++>-]<.>>++++++++++[<++++++++++> \
-]<- - -.<.>+.->>++++++++++[<+++++++++++>-]<++++.<.>>>++++++++++[ \
<++++++++++>-]<+++++.<<<<+.->>>>- - -.<+++.- - -<++.- ->>>>>+++++ \
+++++[<+++++++++++>-]<- - -.<<<<<.<+++.>>>.<<<-.- ->>>>+.<.<.<<.> \
++++++++++++++.[-]++++++++++"""`
# \
print "I'm a Python program."; """[-][--><html><head>
<!--:--><title>I'm a HTML page</title></head><body>
<!--:--><h1>I'm a <marquee><blink>horrible HTML</blink></marquee> page</h1>
<!--:--><script language="Javascript">
<!--: # \
setTimeout( // \
function () { // \
document.body.innerHTML = "<h1>I'm a javascript-generated HTML page</h1>"; // \
}, 10000); // \
//-->
</script><!--: \
</body></html><!-- } # \
say "I'm a Perl6 program", try { " ($?PUGS_VERSION)" } // "", "."; # """ # */
#define FOO ]-->~