Landon Curt Noll
085a708660
The HTML files now include a comment indicating from where the main part of the markdown content. Changed `bin/gen-other-html.sh` VERSION from "1.0 2024-02-27" to "1.0.1 2024-03-08". Changed `bin/gen-top-html.sh` VERSION from "1.2 2024-02-29" to "1.2.1 2024-03-08". Changed `bin/gen-year-index.sh` VERSION from "1.0.1 2024-02-23" to "1.0.2 2024-03-08". Changed `bin/md2html.sh` VERSION from "1.0.1 2024-02-23" to "1.1 2024-03-08". Changed `bin/quick-readme2index.sh` VERSION from "1.1.1 2024-02-23" to "1.1.2 2024-03-08".
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<link rel="stylesheet" href="../../ioccc.css">
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>1998/schnitzi - Best Flow Control</title>
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<meta name="description" content="1998 IOCCC entry schnitzi - Best Flow Control">
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<meta name="keywords" content="IOCCC, 1998, IOCCC 1998, IOCCC entry, schnitzi, Best Flow Control">
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<div class="header">
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<img src="../../png/ioccc.png" alt="IOCCC image by Matt Zucker" width=300 height=110>
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<h1>The International Obfuscated C Code Contest</h1>
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<h2>1998/schnitzi - Best Flow Control</h2>
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<a class="Left" href="../fanf/index.html">← fanf</a>
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<a class="Left" href="../index.html">↑ 1998 ↑</a>
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<a class="Left" href="../schweikh1/index.html">schweikh1 →</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1998/schnitzi/schnitzi.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1998/schnitzi/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a href="../../index.html">IOCCC Home</a>
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<a href="../../years.html">Winning Entries</a>
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<a href="../../authors.html">People who have won</a>
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<a href="../../location.html">Location of authors</a>
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<div class="sidenav">
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<a href="../../news.html">IOCCC News</a>
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<a href="../../faq.html#submit">How to enter the IOCCC</a>
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<a href="../../faq.html">FAQ</a>
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</div>
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<hr>
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<div class="sidenav">
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<a href="../../bugs.html">Bugs & (mis)features</a>
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<a href="../../faq.html#fix_an_entry">Fixing IOCCC entries</a>
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<a href="../../faq.html#fix_web_site">Fixing the web site</a>
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<a href="../../faq.html#fix_author">Fixing author info</a>
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<a href="../../thanks-for-help.html">Thanks for the help</a>
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</div>
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<hr>
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<div class="sidenav">
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<a href="../../judges.html">The IOCCC Judges</a>
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<a href="../../contact.html">Contacting the IOCCC</a>
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<hr>
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<a href="#top">Jump to top</a>
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<h2 id="author"><a name="author"></a>Author:</h2>
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<ul>
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<li>Name: <a href="../../authors.html#Mark_Schnitzius">Mark
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Schnitzius</a><br> Location: <a href="../../location.html#ZZ">ZZ</a> -
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<em>Unknown location</em> <br><br></li>
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<h2 id="to-build">To build:</h2>
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<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>
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<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
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<p>The current status of this entry is:</p>
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<pre><code>STATUS: INABIAF - please **DO NOT** fix</code></pre>
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<p>For more detailed information see <a
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href="../../bugs.html#1998_schnitzi">1998 schnitzi bugs</a>.</p>
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<h2 id="to-use">To use:</h2>
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<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">./schnitzi</span> n <span class="op">></span> sort.c</span>
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<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> sort</span>
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<span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./sort</span></span>
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<span id="cb3-4"><a href="#cb3-4" aria-hidden="true" tabindex="-1"></a><span class="co"># enter three numbers, space separated</span></span>
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<span id="cb3-5"><a href="#cb3-5" aria-hidden="true" tabindex="-1"></a></span>
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<span id="cb3-6"><a href="#cb3-6" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> x y z <span class="kw">|</span> <span class="ex">./sort</span></span></code></pre></div>
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<p>where <code>n</code> and <code>x</code>, <code>y</code> and
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<code>z</code> are numbers.</p>
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<h2 id="try">Try:</h2>
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<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>
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<p>What happens if at the command line you don’t specify <code>n</code>
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numbers that the program expects? For instance try:</p>
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<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">./schnitzi</span> 5 <span class="op">></span> sort.c</span>
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<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> sort</span>
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<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a></span>
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<span id="cb5-4"><a href="#cb5-4" aria-hidden="true" tabindex="-1"></a><span class="co"># try running the next command four or five times:</span></span>
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<span id="cb5-5"><a href="#cb5-5" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> 2 5 3 1 <span class="kw">|</span> <span class="ex">./sort</span></span></code></pre></div>
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<p>Why does this happen?</p>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<p>This is a beautiful program. How can a program with no conditional
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(except for the fixes for modern systems) behavior at all have output
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which depends on anything?</p>
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<p>For hints on deciphering this, see below past the Author’s remarks;
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they’re a nice summary, but they leave the mystery intact.</p>
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<p>BTW: the author notes an incredible lipogram story called <a
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href="https://www.gutenberg.org/cache/epub/47342/pg47342.txt">Gadsby</a>
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which has no letter E in the story. He did not note this but it has over
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50000 (50 thousand) (!!) words without the letter E which is one of the
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most common letters!</p>
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<h2 id="authors-remarks">Author’s remarks:</h2>
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<p>In literary circles, there is a poetic form called a “lipogram”,
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which is a poem in which a specific letter has been distinctly avoided.
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This principle can be applied in other ways. For instance, in this
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paragraph, the vowel which immediately follows <code>t</code> in the
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alphabet is nowhere to be seen. There is even an entire novel (E. V.
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Wright’s “Gadsby”) in which no word contains the letter
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<code>e</code>.</p>
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<p>The IOCCC has been no stranger to this concept. Several winning
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entries from years past have accomplished interesting feats while
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completely avoiding the use of certain C constructs thought to be
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essential (e.g. <a
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href="../../1988/robison/robison.c">1988/robison.c</a>). If you have to
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ask why they would do it this way, then this contest just isn’t for
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you.</p>
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<p>In continuing with this fine tradition, this program suggests to the
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ANSI committee some new practical simplifications for the C language.
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For instance, it appears that CONDITIONAL BRANCHING isn’t really
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necessary. So, we can do away with <code>while</code>,
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<code>do...while</code>, <code>for</code>,
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<code>if</code>/<code>else</code>, <code>switch</code>, <code>?:</code>,
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or anything else that might cause any kind of non-deterministic jump in
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the code. There’s too much uncertainty in the world anyway.</p>
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<p>Function parameters and return types just confuse people anyway, so
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get rid of them. Same with local variables. In fact, all you really need
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are assignment statements, and maybe one <code>printf(3)</code> and one
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<code>goto</code>.</p>
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<p>This style of programming is also ideal for systems with limited
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memory capacity, since the function call stack never goes beyond a depth
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of one.</p>
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<p>So what does it do? Give it an integer
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<code>(1 < n < 27)</code> on the command line, such as</p>
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<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">./schnitzi</span> 5</span></code></pre></div>
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<p>The output will itself be a lipographic program, one which expects
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input of (in this case) five numbers and prints them out sorted. It
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sorts them, however, using only <code>if/else</code> statements, without
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arrays or looping. To see the resulting program run, redirect the output
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from <code>schnitzi</code> into another file, like this</p>
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<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./schnitzi</span> 4 <span class="op">></span> sort.c</span></code></pre></div>
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<p>and then compile it.</p>
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<h3 id="spoilers-and-hints">Spoilers And Hints:</h3>
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<p>The big key to this program is figuring out what the names of the
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functions ought to be; a bit of research may allow you to guess at a few
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crucial ones.</p>
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<p>The only function ever called is <code>O</code>, but <code>O</code>
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is just set to point to other functions all the time. Or, almost all the
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time.</p>
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<p>So how does <code>h</code> get set, and what to?</p>
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<h2 id="copyright-and-cc-by-sa-4.0-license">Copyright and CC BY-SA 4.0
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License:</h2>
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<p>This file is Copyright (c) 2023 by Landon Curt Noll. All Rights
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Reserved. You are free to share and adapt this file under the terms of
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this license:</p>
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<pre><code>Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)</code></pre>
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<p>For more information, see:
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||
https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-1998schnitzi"><a name="inventory"></a>Inventory
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for 1998/schnitzi</h1>
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<p><a href="#top">Jump to top</a></p>
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<h2 id="primary-files">Primary files</h2>
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<ul>
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<li><a
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href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schnitzi/schnitzi.c">schnitzi.c</a>
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- entry source</li>
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<li><a
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href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schnitzi/Makefile">Makefile</a>
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- entry Makefile</li>
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<li><a
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href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schnitzi/schnitzi.orig.c">schnitzi.orig.c</a>
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- original source</li>
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<li><a
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href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schnitzi/try.sh">try.sh</a>
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- how to run</li>
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<li><a href="1998_schnitzi.tar.bz2">1998_schnitzi.tar.bz2</a> - download
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entry source</li>
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</ul>
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<h2 id="secondary-files">Secondary files</h2>
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<ul>
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<li><a href="index.html">index.html</a> - entry home page</li>
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<li><a
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href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schnitzi/.entry.json">.entry.json</a>
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- description of entry in JSON</li>
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<li><a
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href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schnitzi/.gitignore">.gitignore</a>
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- list of files that should not be committed under git</li>
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<li><a href=".path">.path</a> - directory path from top directory</li>
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<li><a
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href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schnitzi/README.md">README.md</a>
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- markdown source for index.html</li>
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</ul>
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<div class="footer">
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<hr>
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<h2>Coda</h2>
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<p><a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1998%2Fschnitzi%2Findex.html">Nu HTML check this web page</a></p>
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<p><a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a></p>
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</div>
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