Files
ioccc/1989/robison/index.html
T
Landon Curt Noll 0833c3e4f0 fix how bin tools sort
We set LC_ALL=C when sorting in a bin tool.  This was done
to make the result of using `sort(1)` consistent.

Improved how the Primary files and Secondary files are
sorted by `bin/output-index-inventory.sh` to sort
with "-u -k 1n -k 3.2d".

The above will change `index.html` files for all entries.

Changed `bin/chk-entry.sh` VERSION from "1.1.2 2024-03-17"
to "1.1.3 2024-03-18".

Changed `bin/gen-authors.sh` VERSION from "1.3 2024-03-04"
to "1.3.1 2024-03-18".

Changed `bin/gen-location.sh` VERSION from "1.1 2024-03-04"
to "1.1.1 2024-03-18".

Changed `bin/gen-sitemap.sh` VERSION from "1.3 2024-03-16"
to "1.3.1 2024-03-18".

Changed `bin/output-index-inventory.sh` VERSION from "1.2 2024-02-27"
to "1.2.1 2024-03-18".

Changed `bin/pandoc-wrapper.sh` VERSION from "1.5 2024-03-18"
to "1.5.1 2024-03-18".

Changed `bin/sort.gitignore.sh` VERSION from "1.1.1 2024-02-23"
to "1.1.2 2024-03-18".

Changed `bin/tar-all.sh` VERSION from "1.1 2024-02-27"
to "1.1.1 2024-03-18".

Changed `bin/tar-year.sh` VERSION from "1.1 2024-02-27"
to "1.1.1 2024-03-18".

Performed `make www` to update all entry `index.html` files.
2024-03-18 02:43:03 -07:00

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<title>1989/robison - Best minimal use of C</title>
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<meta name="keywords" content="IOCCC, 1989, IOCCC 1989, IOCCC entry, robison, Best minimal use of C">
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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>1989/robison - Best minimal use of C</h2>
</div>
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<div class="topnav">
<a class="Left" href="../paul/index.html">&larr; paul</a>
<a class="Left" href="../index.html">&uarr; 1989 &uarr;</a>
<a class="Left" href="../roemer/index.html">roemer &rarr;</a>
<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1989/robison/robison.c">C code</a>
<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1989/robison/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#Arch_D_Robison">Arch D. Robison</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</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>
<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
<p>The current status of this entry is:</p>
<pre><code>STATUS: INABIAF - please **DO NOT** fix</code></pre>
<p>For more detailed information see <a href="../../bugs.html#1989_robison">1989 robison bugs</a>.</p>
<h2 id="to-use">To use:</h2>
<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">./robison</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a><span class="co"># enter valid expressions</span></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">./robison</span></span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="ex">11x10</span></span>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="co"># enter other expressions</span></span>
<span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-5"><a href="#cb4-5" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.sh</span></span>
<span id="cb4-6"><a href="#cb4-6" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-7"><a href="#cb4-7" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> 100 / 100 <span class="kw">|</span> <span class="ex">./robison</span> <span class="co"># &lt;-- what happens here ?</span></span></code></pre></div>
<p>NOTE: This program will very likely crash or break into tiny bits :-) if you
feed it numbers with non-binary digits. This, as you might notice if you try one
of the above commands, can happen with other input as well. If you wish to
understand why this happens check the source code.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>Sites with punch card facilities will be happy to note that
the source deck can be re-collated with an ASCII sort.</p>
<p>Note that this program uses only a small subset of the
constructs that the C language supports.</p>
<p>For an interesting document on APL, see
<a href="https://computerhistory.org/blog/the-apl-programming-language-source-code/" class="uri">https://computerhistory.org/blog/the-apl-programming-language-source-code/</a>.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>This program is a handy picoAPL interpreter written in <code>C--</code>. It
outputs the evaluation of an
<a href="https://en.wikipedia.org/wiki/APL_(programming_language)">APL</a> expression from standard
input. Functions are limited to dyadic <code>+</code>,<code>-</code>,<code>x</code>, and unary <code>-</code>;
numerals must be binary. Parentheses may be used for
grouping. For example:</p>
<pre><code>101x111-100</code></pre>
<p>prints:</p>
<pre><code>1111</code></pre>
<p>That is <code>5x(7-4)</code> is <code>15</code>. (APL groups from right to left.)
Extending it to the full APL language should be trivial.</p>
<p>The <code>C--</code> language improves the C language by removing superfluous
and confusing features: arithmetic, logical operations, shifts,
relational operators, address-of, and flow control. In fact, the only
expressions retained are function calls, indirection, array
assignments, the ‘,’ operator, and <code>sizeof</code>. Despite these
restrictions, the <code>C--</code> program does arithmetic on arbitrarily
large binary numbers.</p>
<p>To obtain a <code>C--</code> reference, simply rip out the irrelevant pages
from your K&amp;R C manual. To obtain a <code>C--</code> compiler, simply rip
out the irrelevant bytes from your <code>cc</code> compiler.</p>
<h2 id="copyright-and-cc-by-sa-4.0-license">Copyright and CC BY-SA 4.0 License:</h2>
<p>This file is Copyright (c) 2023 by Landon Curt Noll. All Rights Reserved.
You are free to share and adapt this file under the terms of this license:</p>
<pre><code>Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)</code></pre>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-1989robison"><a name="inventory"></a>Inventory for 1989/robison</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/1989/robison/robison.c">robison.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/robison.orig.c">robison.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/try.sh">try.sh</a> - how to run</li>
<li><a href="1989_robison.tar.bz2">1989_robison.tar.bz2</a> - download entry source</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/1989/robison/README.md">README.md</a> - markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
<li><a href=".path">.path</a> - directory path from top directory</li>
</ul>
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<h2>Coda</h2>
<p><a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1989%2Frobison%2Findex.html">Nu HTML check this web page</a></p>
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