Landon Curt Noll
f29b37e49a
Prepare for the winners of **IOCCC28**. > However these are not the 2024 droids you are looking for. :-) The HTML menu (both JavaScript and non-JavaScript) has been updated. The `Status -> Rules and guidelines' have been replaced with two separate menus `Status -> IOCCC rules` and `Status -> IOCCC guidelines`. Added a new top level `social.html` page: built from a new `social.md`. Sorted rules for building specific web pages in the top level `Makefile`. Added `make social` to make the `social.html` page from `social.md`. The `bin/gen-top-html.sh` now is able to process a argument of **social** to process the new top level `social.html` page. Changed `bin/gen-top-html.sh` VERSION from "2.0.0 2025-03-13" to "2.0.1 2025-07-25". Below `About -> Home page` a new `About -> IOCCC social media` menu item as added. Because the menu change touched every HTML file, we changed the general copyright date range for HTML files from "1984-2024" to "1984-2025" due to the extensive changes made for **IOCCC28**. Those markdown files that were modified in 2025 had their copyright date range also changed from "1984-2024" to "1984-2025". Rebuilt tarballs and sitemap due to the extensive HTML rebuilding. Ran `make update` to perform the above.
128 lines
4.7 KiB
Markdown
128 lines
4.7 KiB
Markdown
# Twenty Fourth International Obfuscated C Code Contest
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## Standard IOCCC stuff
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View the `index.html` web page for the given winning entry for information on how
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compile the entry and how to run the winning program. Look at the winning
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source and try to figure how it does what it does! You may then wish to look at
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the Author's remarks for even more details. This year we included most of the
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information included by the submitter.
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Some ANSI C compilers are not quite as good as they should be. If
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yours is lacking, you may need to compile using gcc instead of your
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local compiler.
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### Historical note:
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The IOCCC has a website and now has a number of international mirrors.
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The primary website can be found at [www.ioccc.org](https://www.ioccc.org).
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### Historical update:
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The IOCCC website once had a number of
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[international mirrors](https://web.archive.org/web/20201030210517/https://www.ioccc.org/mirror.html).
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As of 2020 Dec 29, [GitHub](https://www.github.com) serves as the distributed server farm for the
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[IOCCC winner repo](https://github.com/ioccc-src/winner) that GitHub renders as
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[Official IOCCC website - www.ioccc.org](https://www.ioccc.org).
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## Remarks on some of the winning entries
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We believe you will again be impressed with this year's winning entries.
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The fraction of worthy entries was higher than usual.
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We call to your attention the [hou](hou/index.html) entry that performs the MD5
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cryptographic hash. Normally implemented with a set of integer and boolean
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operations, this code uses floating point variables inside a single `while` loop
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filled with unusual constants, cosine, square root, and exponent function calls.
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The number of lines of code is also smaller than the original algorithm.
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The [mills2](mills2/index.html) source code is a very compressed version of a
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decompression algorithm. We think those who enjoy compression algorithms will
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particularly enjoy this entry.
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We suggest that you attempt to completely understand the
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[endoh4](endoh4/index.html) 1-liner program: another impressive compact piece of
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C code.
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And while you are at it, cat the [endoh2 prog.c](%%REPO_URL%%/2015/endoh2/prog.c) code. Compile it
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and look at the source code again.
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In a "Back to the Future" moment, [endoh3](endoh3/index.html) gave us a twist on
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one of the all time best IOCCC entries from 1984.
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We also suggest that you take a very good look at how the
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[muth](muth/index.html) code makes full use of the C Pre-Processor.
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...We'll stop spouting spoilers now. Have fun exploring all the entries!
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## Remarks on some of submissions that did not win
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The number of entries that would have made it into the final rounds
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would have been much higher had some people paid attention to rules 2
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and 22 (one third of 666).
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Rule 22, now known as **Catch 22** states:
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> 22) Your source code, data files, remarks and program output must NOT identify
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> the authors of your code. The judges STRONGLY prefer to not know who is
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> submitting entries to the IOCCC.
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>
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> The "Peter Honeyman is exempt" guideline also applies to this rule.
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> Identifying yourself, in an obvious way in your code, data, remarks or program
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> output, unless you are Peter Honeyman or pretending to be Peter Honeyman, will
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> be grounds for disqualification of your entry.
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A number of other entries were based on [iocccsize.c](%%REPO_URL%%/2015/iocccsize.c), making
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derivative works rather than original works.
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Still other entries were too large, violating the first line of rule 2:
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> 2) The size of your program source must be <= 4096 bytes in length.
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While these entries might have passed under the 2053 limit for iocccsize,
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they were larger than <= 4096 bytes, sometimes by an order or magnitude.
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We hope the authors of some of those entries will fix and re-submit
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them for the next IOCCC.
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## Final Comments
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Please feel free to send us comments and suggestions about the
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competition, this README or anything else that you would like to see in
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future contests.
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If you use, distribute or publish these entries in some way, please drop
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us a line. We enjoy seeing who, where and how the contest is used.
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If you have problems with any of the entries, AND YOU HAVE A FIX, please
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send us the fix (patch file or the entire changed file).
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For the latest information on how to contact the [IOCCC judges](../judges.html) please visit
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* [contact.html](../contact.html)
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For news of the next contest watch:
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* [news.html](../news.html)
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<!--
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Copyright © 1984-2025 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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For more information, see:
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https://creativecommons.org/licenses/by-sa/4.0/
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-->
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