Obfuscated Code

299

Apr 10, 2002 at 9:51 PM

I thought one of the goals in programming is making your code understandable... The following is an actual program....try to figure out what it does WITHOUT COMPILING IT...I tested it, and it does compile (with a few modifications) under MSVC++ 6

  
#include <stdio.h> 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);

Ya know...they even made a contest out of it... _____________________________________________________ ICQ #: 149510932

Google - OpenGL - DirectX - Windows Guide Network - MSDN - Symantec Virus Info "Imagination is more important than knowledge." - Albert Einstein

Lohrno

Apr 10, 2002 at 9:53 PM

My guess is it prints a string, but that string is encoded.

-=Lohrno

Author

299

Apr 10, 2002 at 9:58 PM

quote:
Original post by Lohrno
My guess is it prints a string, but that string is encoded.

-=Lohrno

Actually, it prints 12 strings...

_____________________________________________________

ICQ #: 149510932

Google - OpenGL - DirectX - Windows Guide Network - MSDN - Symantec Virus Info

"Imagination is more important than knowledge." - Albert Einstein

203

Apr 10, 2002 at 10:03 PM

Wow, Programmer One finally finds the 17-year-old IOCCC.

So All I can say is: Hello and welcome to 17 years ago!

Author

299

Apr 10, 2002 at 10:09 PM

quote:
Original post by pouya
Wow, Programmer One finally finds the 17-year-old IOCCC.

So All I can say is: Hello and welcome to 17 years ago!

Oh, ok, old timer...

_____________________________________________________

ICQ #: 149510932

Google - OpenGL - DirectX - Windows Guide Network - MSDN - Symantec Virus Info

"Imagination is more important than knowledge." - Albert Einstein

247

Apr 10, 2002 at 10:31 PM

Does it print out the 12 days of christmas? Beacuse I ahve seen and compiled that one before, and it seems fairly similar

ACTUALLY... I change my mind... it IS the twelve days of christmas

main(t,_,a) gave it away to my memory

-Chris Bennett of Dwarfsoft - The future of RPGs

GPA

Thanks to all the goblins in the GDCorner niche

247

Apr 10, 2002 at 10:37 PM

under borland I believe I had to compile it more like this:

    
#include <stdio.h>

main1(t,_,a) char *a; { ... } /* all that stuff in here, changing all recursive calls to "main" to "main1" instead */

main(t,_,a) char *a; { main1(t,_,a); }

because it wouldn't work otherwise

-Chris Bennett of Dwarfsoft - The future of RPGs

GPA

Thanks to all the goblins in the GDCorner niche

[edited by - dwarfsoft on April 10, 2002 11:38:37 PM]

Null and Void

163

Null and Void

Apr 10, 2002 at 10:41 PM

quote:
Original post by dwarfsoft
changing all recursive calls to "main" to "main1" instead

C++ doesn''t allow recursion of main, but I''m pretty sure that C does. Maybe that''s why?

247

Apr 10, 2002 at 10:45 PM

yeah, well I didn''t have a simple C compiler, and anyway, I am only recalling this from memory. I don''t have my borland cd and the only thing I have installed is MSVC6, which although may compile will not run as expected.

Oh, and for MSVC6 I believe you need to initialise t as an int.

-Chris Bennett of Dwarfsoft - The future of RPGs

GPA

Thanks to all the goblins in the GDCorner niche

558

Apr 10, 2002 at 11:21 PM

What''s the shortest C program that will compile and crash when run?

203

Apr 10, 2002 at 11:36 PM

quote:
Original post by LessBread
What''s the shortest C program that will compile and crash when run?

Windows:

#include <windows.h>
void main() { HWND blah; UpdateWindow(blah); } /* uninitialized */

Unix: This is my favorite

void main() { while(1) fork(); }

Oluseyi

526

Oluseyi

Apr 10, 2002 at 11:40 PM

quote:
Original post by pouya
Unix: This is my favorite

void main() { while(1) fork(); }

558

Apr 10, 2002 at 11:43 PM

quote:
Original post by Oluseyi
void main() { while(1) fork(); }

Your sysadmin will kill you for that!

Lol!

How long shall I wait before providing the answer?

558

Apr 11, 2002 at 3:24 AM

Do not meddle in the affairs of moderators, for they are subtle and quick to anger.

[edited by - dwarfsoft on April 11, 2002 6:43:20 AM]

Sandman

210

Sandman

Apr 11, 2002 at 5:09 AM

quote:
Original post by pouya
Windows:

#include <windows.h>
void main() { HWND blah; UpdateWindow(blah); } /* uninitialized */

Unix: This is my favorite

void main() { while(1) fork(); }

I disagree:

void main() {int i=0;1/i;}

is shorter. But not as much fun as the unix one.

EDIT: Meh. Still wrong.

[edited by - Sandman on April 11, 2002 6:10:59 AM]

558

Apr 11, 2002 at 2:14 PM

quote:
Original post by dwarfsoft
Do not meddle in the affairs of moderators, for they are subtle and quick to anger.

Um, well, interesting to find my posts censored - considering that the exchange with dwarfsoft was pretty mild as they go. Whatever.

At any rate, again here''s the answer to the question I asked above since dwarfsoft removed it along with the other comments:

  
main;

Lohrno

Apr 11, 2002 at 2:45 PM

... That''s not a good sign.

-=Lohrno

Gabriel Fleseriu

Apr 11, 2002 at 3:01 PM

please open a new .CPP file, write

main;

into it, and try to compile.

[edit]darn, it compiles under C. Mea Culpa.

Forever trusting who we are
And nothing else matters - Metallica

[edited by - Gabriel Fleseriu on April 11, 2002 4:03:45 PM]

558