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.
To build:
We recommend that you try the alternate version first so you can see what this entry looked like back in 1995 (with a configurable speed). See the Original code section below for the original entry.
make alt
The alternate version uses usleep(3) with SLEEP (defined in the Makefile,
default 3000) microseconds to make it easier to see the maze being solved in
real time. You can redefine SLEEP at compile time to reconfigure it in case
it's going too slow, too fast :-) or you're doing some strange experiment like
making it 100000 (which is actually fun :-) ).
Bugs and (Mis)features:
The current status of this entry is:
STATUS: INABIAF - please DO NOT fix
For more detailed information see 1995/cdua in bugs.html.
To use:
./cdua.alt
Try:
make SLEEP=1500 clobber alt
./cdua.alt # press enter and watch it go much faster!
You might also like to try:
make SLEEP=65000 clobber alt
./cdua.alt # press enter and watch it go much slower!
Do you see anything strange in this version when SLEEP is a high value like
65000? What happens if you use 100000? Is this strange output still there?
Why?
Original code:
With modern systems this was hard to see it solve it in real time because it goes so quickly which is why we recommend the alternate version first: you can actually see it being solved in real time rather than have it go by in a flash.
If you wish to use the original version, for instance if you wish to see how fast your computer is :-) or use both to see the difference, you can do so.
Original build:
make all
Original use:
./cdua
Judges' remarks:
This could be used as the basis of an a-maze-ing screen exerciser.
Author's remarks:
A program that generates a maze, and then solves it, all this being seen by the
user. Some highlights of obfuscation are: 3 step function in one - main(),
several recursive calls with conditional actions, and just one (big and ugly)
statement to solve the maze.