Landon Curt Noll
a9ca93ec47
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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>1989/robison - Best minimal use of C</h2>
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<div class="navbar">
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<a class="Left" href="../paul/index.html">← paul</a>
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<a class="Left" href="../index.html">↑ 1989 ↑</a>
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<a class="Left" href="../roemer/index.html">roemer →</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/robison.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1989%2Frobison%2Findex.html">✓</a>
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<h2 id="author">Author:</h2>
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<ul>
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<li>Name: <a href="../../authors.html#Arch_D_Robison">Arch D. Robison</a><br>
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Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)</li>
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</ul>
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<!-- BEFORE: 1st line of markdown file: 1989/robison/README.md -->
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<h2 id="to-build">To build:</h2>
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<pre><code> make all</code></pre>
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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 href="../../bugs.html#1989_robison">1989 robison bugs</a>.</p>
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<h2 id="to-use">To use:</h2>
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<pre><code> ./robison
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# enter valid expressions</code></pre>
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<h2 id="try">Try:</h2>
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<pre><code> ./robison
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11x10
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# enter other expressions
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./try.sh
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echo 100 / 100 | ./robison # <-- what happens here ?</code></pre>
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<p>NOTE: This program will very likely crash or break into tiny bits :-) if you
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feed it numbers with non-binary digits. This, as you might notice if you try one
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of the above commands, can happen with other input as well. If you wish to
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understand why this happens check the source code.</p>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<p>Sites with punch card facilities will be happy to note that
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the source deck can be re-collated with an ASCII sort.</p>
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<p>Note that this program uses only a small subset of the
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constructs that the C language supports.</p>
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<p>For an interesting document on APL, see
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<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>
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<h2 id="authors-remarks">Author’s remarks:</h2>
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<p>This program is a handy picoAPL interpreter written in <code>C--</code>. It
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outputs the evaluation of an
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<a href="https://en.wikipedia.org/wiki/APL_(programming_language)">APL</a> expression from standard
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input. Functions are limited to dyadic <code>+</code>,<code>-</code>,<code>x</code>, and unary <code>-</code>;
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numerals must be binary. Parentheses may be used for
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grouping. For example:</p>
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<pre><code> 101x111-100</code></pre>
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<p>prints:</p>
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<pre><code> 1111</code></pre>
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<p>That is <code>5x(7-4)</code> is <code>15</code>. (APL groups from right to left.)
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Extending it to the full APL language should be trivial.</p>
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<p>The <code>C--</code> language improves the C language by removing superfluous
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and confusing features: arithmetic, logical operations, shifts,
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relational operators, address-of, and flow control. In fact, the only
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expressions retained are function calls, indirection, array
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assignments, the ‘,’ operator, and <code>sizeof</code>. Despite these
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restrictions, the <code>C--</code> program does arithmetic on arbitrarily
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large binary numbers.</p>
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<p>To obtain a <code>C--</code> reference, simply rip out the irrelevant pages
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from your K&R C manual. To obtain a <code>C--</code> compiler, simply rip
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out the irrelevant bytes from your <code>cc</code> compiler.</p>
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<!--
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Copyright © 1984-2024 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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<div id="inventory">
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<h1 id="inventory-for-1989robison">Inventory for 1989/robison</h1>
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</div>
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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 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/robison.c">robison.c</a> - entry source</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/Makefile">Makefile</a> - entry Makefile</li>
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<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>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/try.sh">try.sh</a> - how to run</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="1989_robison.tar.bz2">1989_robison.tar.bz2</a> - download entry tarball</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/README.md">README.md</a> - markdown source for this web page</li>
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<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>
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<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>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1989/robison/.path">.path</a> - directory path from top directory</li>
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<li><a href="index.html">index.html</a> - this web page</li>
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</ul>
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Copyright © 1984-2024 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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<div id="copyright"><h2>Copyright and CC BY-SA 4.0 License</h2></div>
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<p>All IOCCC content including this file and web page are:</p>
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<b> Copyright © 1984-2024 by Landon Curt Noll. <a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean">Some Rights Reserved</a>.</b>
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<p>This work is licensed by Landon Curt Noll under:</p>
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<p><b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
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target="_blank" rel="license noopener noreferrer" style="display:inline-block;"> CC BY-SA 4.0
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<p>The <b>CC BY-SA 4.0 LEGAL CODE</b> for this license is found under:</p>
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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%2F1989%2Frobison%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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