Fun_People Archive
1 Dec
Christmas C Code


Date: Wed,  1 Dec 93 16:01:54 PST
To: Fun_People
Subject: Christmas C Code

[Your job, should you choose to accept it, is to figure out what this program
does when compiled (it DOES compile) and executed.  Good luck.  -psl]

 From: Chris LaFournaise <lafourc@storm.cs.orst.edu>

I generally don't go passing around C code to strangers :) but this
is really kind of a neat program.  The forwards are long gone, but I
suspect from the header that it came out of the Obfuscated C Programming
Contest.

Merry Christmas...
 - - - Cut here - - -
/*
LEAST LIKELY TO COMPILE SUCCESSFULLY:
  Ian Phillipps, Cambridge Consultants Ltd., Cambridge, England

  An appropriate program for December 25th, this consists primarily of
  calls to main() combined by a lot of the ternary conditional (?:)
  operators. Have you ever seen a more forceful return? The judges note
  that this program looked like what you would get by pounding on the keys
  of a type writer at random.

  Note -- I have made a minor correction (for spelling) to line 47, where I
  added a missing comma at column 59.
*/

main(t,_,a)
char
*
a;
{
	return!

0<t?
t<3?

main(-79,-13,a+
main(-87,1-_,
main(-86, 0, a+1 )


+a)):

1,
t<_?
main(t+1, _, a )
:3,

main ( -94, -27+t, a )
&&t == 2 ?_
<13 ?

main ( 2, _+1, "%s %d %d\n" )

:9:16:
t<0?
t<-72?
main( _, t,
"@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}eKK#}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' ')# }'+}##(!!/")
:
t<-50?
_==*a ?
putchar(31[a]):

main(-65,_,a+1)
:
main((*a == '/') + t, _, a + 1 )
:

0<t?

main ( 2, 2 , "%s")
:*a=='/'||

main(0,

main(-61,*a, "!ek;dc i@bK'(q)-[w]*%n+r3#l,{}:\nuwloca-O;m .vpbks,fxntdCeghiry")

,a+1);}




[=] © 1993 Peter Langston []