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ioccc/2000/natori/index.html
T
Landon Curt Noll 4ee4c731f7 convert markdown copyright TAB chars into SPACE chars
While not strictly necessary, replacing the two ASCII tab characters
in the markdown copyright comment makes it easier to detect problematic
TAB indentation within markdown files.

After this commit, only 90 markdown files have leading ASCII TAB
characters.  And again, while not strictly necessary, we can consider
running expand on those 90 markdown files to see what effect that
might have on the HTML files they produce.

Replace leading ASCII TAB characters with multiples of 8 ASCII SPACE
characters (the default action of the `expand(1)` tool) might have
an negative effect on some HTML formatting where **hack-a-round**
formatting was attempted to fix broken indentation caused by
problematic ASCII TAB characters.

Think of this as a baseline for evaluating leading
TAB characters within markdown files.

TODO: Consider either using `expand(1)` to replace leading ASCII
TAB characters with multiples of 8 ASCII SPACE characters AND/OR
modifying the appropriate `bin` tool to convert leading ASCII TAB
characters into multiples of 8 ASCII SPACE characters.
2024-06-22 22:15:25 -07:00

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<h1>The International Obfuscated C Code Contest</h1>
<h2>2000/natori - Best small program</h2>
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<a class="Left" href="../jarijyrki/index.html">&larr; jarijyrki</a>
<a class="Left" href="../index.html">&uarr; 2000 &uarr;</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/natori.c">C code</a>
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<h2 id="author">Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#NATORI_Shin">NATORI Shin</a><br>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
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<h2 id="to-build">To build:</h2>
<pre><code> make</code></pre>
<p>An alt version exists for those in the southern hemisphere (or those who want to
see what it would be in the southern hemisphere). See <a href="#alternate-code">alternate
version</a> below.</p>
<h2 id="to-use">To use:</h2>
<pre><code> ./natori</code></pre>
<h2 id="try">Try:</h2>
<pre><code> ./try.sh</code></pre>
<p>Try running this on different days, say a few days apart (even better if the
Moon phase changes), and each time run it several times in a row (or several
times in a day).</p>
<p>Also try modifying the code so that it will show another Moon phase based on
input or else just by the code itself. Bonus points if you can make it show all.</p>
<p>NOTE: if it’s a Full Moon the script won’t look as nice.</p>
<h2 id="alternate-code">Alternate code:</h2>
<p>The author noted that those in the southern hemisphere might want to change
<code>acos(l/2)</code> into <code>acos(-l/2)</code> which we have done in the alternate version.</p>
<h3 id="alternate-build">Alternate build:</h3>
<p>To run the alternate code that supports the southern hemisphere:</p>
<pre><code> make alt</code></pre>
<h3 id="alternate-use">Alternate use:</h3>
<pre><code> ./natori.alt</code></pre>
<p>Try running this on different days, say a few days apart, and each time run it
several times in a row (or several times in a day).</p>
<p>What happens if you run it in the northern hemisphere? Are there any
differences?</p>
<p>Can you identify any Moon phases that result in the same output of both
versions? Or are there any?</p>
<h3 id="alternate-try">Alternate try:</h3>
<pre><code> ./try.alt.sh</code></pre>
<p>Like with <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/try.sh">try.sh</a>, try using this multiple times in a row or throughout
the day on different days (if different phases of the Moon you’ll see more of a
difference, of course).</p>
<p>NOTE: if it’s a Full Moon the script won’t look as nice.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>Here is a nice compact program that changes with the phase of the Moon.
Can you figure out how it does it?</p>
<p>The ANSI-C committee, among their multiple misdeeds, broke perfectly fun C
programs by making it intractable for them to declare their own non-traditional
prototype for <code>main()</code>. We have had to uglify this program in order to prevent
C compilers from failing to compile it due to (the now changed) unusual arg
types of the <code>main()</code> function.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>This program outputs a rough image of the moon in its current phase.
The main obfuscation of this entry is its complicated double recursion
(without any loop or conditional statement).</p>
<p>People living in the southern hemisphere may want to change <code>acos(l/2)</code>
into <code>acos(-l/2)</code>.</p>
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<div id="inventory">
<h1 id="inventory-for-2000natori">Inventory for 2000/natori</h1>
</div>
<h2 id="primary-files">Primary files</h2>
<ul>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/natori.c">natori.c</a> - entry source code</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/natori.alt.c">natori.alt.c</a> - alternate source code</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/natori.orig.c">natori.orig.c</a> - original source code</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/try.alt.sh">try.alt.sh</a> - script to try alternate code</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/try.sh">try.sh</a> - script to try entry</li>
</ul>
<h2 id="secondary-files">Secondary files</h2>
<ul>
<li><a href="2000_natori.tar.bz2">2000_natori.tar.bz2</a> - download entry tarball</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/README.md">README.md</a> - markdown source for this web page</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/natori/.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/2000/natori/.path">.path</a> - directory path from top level directory</li>
<li><a href="index.html">index.html</a> - this web page</li>
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