Files
Landon Curt Noll a1c86c8a7a add original C links to entry navigation bars
The navigation bar for a winning entry now has a "_Original C_" link
(between the ✅ and the Inventory on the right hand side) so that one
may easily view the original C code that was submitted for IOCCC judging.

Ran `make www timestamp` to perform the above.
2025-08-10 12:46:23 -07:00

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<h1>The International Obfuscated C Code Contest</h1>
<h2>2006/hamre - Most irrational</h2>
<h3>A calculator for rational numbers</h3>
</div>
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<div class="navbar">
<a class="Left" href="../grothe/index.html">&larr; 2006/grothe</a>
<a class="Left" href="../index.html">&uarr; 2006 &uarr;</a>
<a class="Left" href="../meyer/index.html">2006/meyer &rarr;</a>
<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/hamre.c">C code</a>
<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/Makefile">Makefile</a>
<a class="Right" href="#inventory">Inventory</a>
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<h2 id="author">Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Steinar_Hamre">Steinar Hamre</a><br>
Location: <a href="../../location.html#NO">NO</a> - <em>Kingdom of Norway</em> (<em>Norway</em>)</li>
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<h2 id="to-build">To build:</h2>
<pre><code> make</code></pre>
<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
<p>The current status of this entry is:</p>
<blockquote>
<p><strong>STATUS: INABIAF - please DO NOT fix</strong></p>
</blockquote>
<p>For more detailed information see <a href="../../bugs.html#2006_hamre">2006/hamre in bugs.html</a>.</p>
<h2 id="to-use">To use:</h2>
<pre><code> ./hamre math_expression_string</code></pre>
<h2 id="try">Try:</h2>
<pre><code> ./try.sh</code></pre>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>An irrationally coded source presents rational things!</p>
<p>A rational person might want to attempt the
<a href="https://rationalwiki.org/wiki/Rationality">irrational</a> task
of supporting a new operator by way of an existing macro
in the source. And can you determine which macro this is
and understand the purpose of its arguments?</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>This is a calculator for <a href="https://en.wikipedia.org/wiki/Rational_number">rational
numbers</a>. Believe it or not, that
is a useful tool to have around, and I haven’t found a useful version, much less
an obfuscated one.</p>
<p>It is rather feature complete as rational calculators go. The
supported operators are: <code>+</code>, <code>-</code> (binary and unary), <code>*</code>, <code>/</code> and <code>()</code>. Run it
by supplying an expression as the first argument, and the normalized
result will be written to <code>stdout</code>.</p>
<pre><code> ./hamre &#39;-1+4/3*(2+1/(3/2*(7/2-7/3+1/6)))/2&#39;
2/3</code></pre>
<p>If you do not supply an argument, the calculator will crash. Other
arguments are ignored. Supplying more arguments may further limit the
number of nested operators supported.</p>
<p>Remember that <code>1/0</code> is not a rational number. You will not get any
answer if you divide by zero.</p>
<p>By default, only 31 nested levels of operators are supported.</p>
<p>The code is well documented, even with an example. In fact this
documentation accounts for 100% of the source. Personally I find
preprocessing or re-indenting the program counterproductive when it
comes to understanding the source. The preprocessed source becomes
rather verbose.</p>
<p>IOCCC entries are often loaded with all kinds of hard-coded numbers. I
have restricted myself to mostly use sensible numbers (<code>&lt;= 7</code>) as
smaller numbers are much easier to remember. Also the macros really
help hide most of the uses of these numbers away. All macros and
variables are easy-to-remember single character abbreviations, from
some language, meaningful to the purpose(s) of the macro, I hope.</p>
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<div id="inventory">
<h1 id="inventory-for-2006hamre">Inventory for 2006/hamre</h1>
</div>
<h2 id="primary-files">Primary files</h2>
<ul>
<li><a href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/hamre.c">hamre.c</a> - entry source code</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/hamre.orig.c">hamre.orig.c</a> - original source code</li>
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</ul>
<h2 id="secondary-files">Secondary files</h2>
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<li><a href="2006_hamre.tar.bz2">2006_hamre.tar.bz2</a> - download entry tarball</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/README.md">README.md</a> - markdown source for this web page</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/2006/hamre/.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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<div id="coda"><h3>Coda</h3>
<p>
<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2006%2Fhamre%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
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