The International Obfuscated C Code Contest

The 20^th IOCCC Competition

The 20^th International Obfuscated C Code Contest is now closed.
Judging has begun!

Read the IOCCC Goals and Rules.
Review the IOCCC guidelines.

Goals of the Contest
Obfuscate: tr.v. -cated, -cating, -cates. 1. a. To render obscure.
b. To darken. 2. To confuse: his emotions obfuscated his judgment.
[LLat. obfuscare, to darken : ob(intensive) + Lat. fuscare,
to darken < fuscus, dark.] -obfuscation n. obfuscatory adj

To write the most Obscure/Obfuscated C program under the rules below.
To show the importance of programming style, in an ironic way.
To stress C compilers with unusual code.
To illustrate some of the subtleties of the C language.
To provide a safe forum for poor C code. :-)

What's New?

12 January 2012: The 20th IOCCC is now closed. If you missed the deadline, save your submission for a future competition.
7 January 2012: Only 5 more days left to enter the 20th IOCCC.
1 December 2011: The online submission tool is now available.
1 December 2011: We strongly encourage the use of Markdown in submitted remarks and documentation!
1 December 2011: The guidelines have been updated. Changes are marked with '|'.
13 November 2011: Follow IOCCC announcements on Twitter.
12 November 2011: The 20th IOCCC is now open. Online submissions will be available 2011-12-01.
12 November 2011: The 18th IOCCC and 19th IOCCC results are now online. please check the Years and Winners pages.
Older news has been archived, but is currently unavailable

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As featured in the Computer Bowl.

Authored by:

chongo <was here> /\oo/\

Copyright © 2005, Landon Curt Noll, Simon Cooper, Peter Seebach and Leonid A. Broukhis. All Rights Reserved.
Permission for personal, education or non-profit use is granted provided this copyright and notice are included in its entirety and remains unaltered. All other uses must receive prior permission in writing from the contest judges.