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ioccc/1993/ejb/index.html
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Landon Curt Noll c457b16358 fix all HTML headers 
Renamed `ioccc.ico` to `favicon.ico`.

Correctly added use of `favicon.ico` to all constructed HTML headers.
Fixed the smart quote in HTML elements problem.

Moved HTML "DO NOT EDIT" comments down below at the bottom of the
HTML phase 1 section.  According to to the Nu Html Checker, a charset
attribute on a meta element found after the first 1024 bytes.

Changed `bin/md2html.sh` VERSION from "1.1.3 2024-03-28"
to "1.2 2024-03-30".

Improved `bin/gen-status.sh` to adjust the "status_update" value
only when the "contest_status" is changed.

Performed a `make www` to perform and test the above under macOS.
2024-03-30 22:21:45 -07:00

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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<link rel="stylesheet" href="../../ioccc.css">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
<title>1993/ejb - Best Obfuscated Algorithm</title>
<link rel="icon" type="image/x-icon" href="../../favicon.ico">
<meta name="description" content="1993 IOCCC entry ejb - Best Obfuscated Algorithm">
<meta name="keywords" content="IOCCC, 1993, IOCCC 1993, IOCCC entry, ejb, Best Obfuscated Algorithm">
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<div class="header">
<img src="../../png/ioccc.png" alt="IOCCC image by Matt Zucker" width=300 height=110>
<h1>The International Obfuscated C Code Contest</h1>
<h2>1993/ejb - Best Obfuscated Algorithm</h2>
</div>
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<div class="topnav">
<a class="Left" href="../dgibson/index.html">&larr; dgibson</a>
<a class="Left" href="../index.html">&uarr; 1993 &uarr;</a>
<a class="Left" href="../jonth/index.html">jonth &rarr;</a>
<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1993/ejb/ejb.c">C code</a>
<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1993/ejb/Makefile">Makefile</a>
<a class="Right" href="#inventory">Inventory</a>
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<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#E_Jay_Berkenbilt">E. Jay Berkenbilt</a><br>
Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em>
<br><br></li>
</ul>
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<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> all</span></code></pre></div>
<h2 id="to-use">To use:</h2>
<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./ejb</span> level</span></code></pre></div>
<p>where:</p>
<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">level</span> a value from <span class="at">-128</span> to 127</span></code></pre></div>
<h2 id="try">Try:</h2>
<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.sh</span></span></code></pre></div>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>A negative argument plays the patience puzzle. An argument
greater than 0 plays the Tower of Hanoi puzzle. In either case
the absolute value of the argument specifies the size of the
respective puzzle. Refer to the web pages <a href="hanoi.html">hanoi.html</a> and
<a href="patience.html">patience.html</a> for more information on these puzzles.</p>
<p>Of course, you need a different kind of “patience” if you give
the argument 127 to this program and want to see it finish!</p>
<p>We note that this also works under macOS just fine.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="what-this-program-does">What this program does</h3>
<h4 id="output-solution-to-towers-of-hanoi-for-five-rings">Output solution to Towers of Hanoi for five rings:</h4>
<div class="sourceCode" id="cb5"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./ejb</span> 5</span></code></pre></div>
<p>The format of the output for the Towers of Hanoi case is simply a
text description of how to solve the puzzle.</p>
<h4 id="output-solution-to-the-patience-puzzle-for-six-rings">Output solution to the Patience puzzle for six rings:</h4>
<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./ejb</span> <span class="at">-6</span></span></code></pre></div>
<p>For the patience puzzle, the output is a sequence binary codes representing
successive states of the puzzle. The rightmost digit represents the first ring.
A <code>1</code> means the ring is on the <code>U</code>; a <code>0</code> means it is off the <code>U</code>. The program
prints the word <code>"Invalid"</code> in response to illegal command line parameters.</p>
<h3 id="motivation">Motivation</h3>
<p>Most people who have written software for other people have been
asked to count lines of code. Naturally, this brings up the
controversial question of exactly what defines a line of code.
This program serves to show that counting semicolons will not
always provide a meaningful measure of code size. This is
especially true in this program where the number of semicolons
itself is ambiguous. Does it have two or three? In addition, the
only C keyword this program uses besides type names and
qualifiers is <code>return</code>, and the only function defined in the code
is <code>main()</code>. The level of complexity of the program without multiple
semicolons, statements, and functions is achieved by abusing C
operators, especially the comma operator. Considerable use of <code>||</code>,
<code>&amp;&amp;</code>, and <code>?:</code> helps too. In addition, <code>main()</code> is called recursively.
The NULL pointer that terminates <code>argv</code> is used to pass additional
information into <code>main()</code>. Even though the algorithms used by this
code are simple, this program is still hard to follow even when
indented properly. (It is pretty hard to indent this code
reasonably, however.)</p>
<p>Although this program has only been tested on UNIX systems it will probably run
on just about any machine with an ANSI C compiler. It does not use the C
preprocessor at all. The only functions it uses are <code>atoi()</code>, <code>malloc()</code>,
<code>memset()</code>, <code>printf()</code>, and <code>puts()</code>. It does, however, require that the
architecture it runs on have bytes that are at least eight bits long and
pointers that are at least four bytes long. In addition, it requires an ANSI
compiler since it uses <code>signed char</code> and ANSI-style function declarations.</p>
<!--
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
You are free to share and adapt this file under the terms of this license:
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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<h1 id="inventory-for-1993ejb"><a name="inventory"></a>Inventory for 1993/ejb</h1>
<p><a href="#top">Jump to top</a></p>
<h2 id="primary-files">Primary files</h2>
<ul>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/ejb.c">ejb.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/ejb.orig.c">ejb.orig.c</a> - original source</li>
<li><a href="hanoi.html">hanoi.html</a> - about the Towers of Hanoi puzzle</li>
<li><a href="patience.html">patience.html</a> - about the Patience puzzle</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/try.sh">try.sh</a> - how to run</li>
<li><a href="1993_ejb.tar.bz2">1993_ejb.tar.bz2</a> - download entry</li>
</ul>
<h2 id="secondary-files">Secondary files</h2>
<ul>
<li><a href="index.html">index.html</a> - entry home page</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/README.md">README.md</a> - markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/hanoi.md">hanoi.md</a> - markdown source for hanoi.html</li>
<li><a href=".path">.path</a> - directory path from top directory</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/ejb/patience.md">patience.md</a> - markdown source for patience.html</li>
</ul>
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
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For more information, see:
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<div class="footer">
<h2>Copyright and CC BY-SA 4.0 License</h2>
<p>This file and web page is:</p>
<blockquote><b>Copyright &copy; 1984-2024 by Landon Curt Noll. All Rights Reserved.</b></p></blockquote>
<p>You are free to share and adapt this file under the terms of this license:</p>
<blockquote><b>Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)</b></blockquote>
<p>For more information, see:</p>
<blockquote><a
href="https://creativecommons.org/licenses/by-sa/4.0/">https://creativecommons.org/licenses/by-sa/4.0/</a></blockquote>
<h2>Coda</h2>
<p><a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1993%2Fejb%2Findex.html">Nu HTML check this web page</a></p>
<p><a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a></p>
</div>
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