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<h1>The International Obfuscated C Code Contest</h1>
<h2>1988/isaak - Best visuals</h2>
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<a class="Left" href="../dale/index.html">&larr; dale</a>
<a class="Left" href="../index.html">&uarr; 1988 &uarr;</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.c">C code</a>
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<h2 id="author">Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Mark_Isaak">Mark Isaak</a><br>
Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em></li>
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<h2 id="to-build">To build:</h2>
<pre><code> make all</code></pre>
<p>There is an alternate version, the original, that can’t be compiled in modern
systems but can be if you have an old enough compiler. See <a href="#alternate-code">Alternate
code</a> below.</p>
<h2 id="to-use">To use:</h2>
<pre><code> ./isaak</code></pre>
<h2 id="alternate-code">Alternate code:</h2>
<p>The original version of this code is in
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.alt.c">isaak.alt.c</a>, with a minor fix so that it
will compile. The original entry starts with the line:</p>
<pre><code> main(){};</code></pre>
<p>This works on some systems. Why? Note that <code>#include &lt;stdio.h&gt;</code> is given on
the last line. Why is this needed? Note the unusual calls to <code>sprintf(3)</code>.</p>
<p>This version also relied on being able to define <code>#define</code> to something else and
using that macro for <code>#define</code>. This was fixed, however, so that you can at
least compile it in modern systems.</p>
<p>This version will not likely work on modern systems even though you should be
able to compile it.</p>
<h3 id="alternate-build">Alternate build:</h3>
<pre><code> make alt</code></pre>
<h3 id="alternate-use">Alternate use:</h3>
<p>Use <code>isaak.alt</code> as you would <code>isaak</code> above.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>The program relies heavily on ASCII. Don’t even think of running it on
an EBCDIC machine.</p>
<h3 id="historical-notes-about-the-original-entry">Historical notes about the original entry</h3>
<p>NOTE: If you named the file anything other than <code>isaak.c</code>, you had to
change the <code>#include</code> on line 6. This limitation has been fixed in
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.c">isaak.c</a> and
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.alt.c">isaak.alt.c</a> by using the <code>__FILE__</code> macro.</p>
<p>NOTE: The use of null comments to separate macros to construct different tokens
from a single macro (e.g., <code>"O/**/O"</code> creates either <code>++</code> or <code>--</code> by defining
<code>O</code> to be <code>+</code> or <code>-</code>) may cause some strict ANSI C preprocessors to object.</p>
<p>NOTE: Most System V machines were not be able to execute this program correctly
due to the fact that BSD style systems have an <code>sprintf(3)</code> that returns a <code>char *</code>. Due to the above problems, we placed the output of this program in the
file <a href="isaak.output.txt">isaak.output.txt</a>.</p>
<p>Since this was fixed, this file is not strictly necessary, but we keep it for
historical purposes (decoded as it used to be uuencoded). See the
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.orig.c">isaak.orig.c</a> for the original source.</p>
<p>FYI: We are likely to be more strict about portability in the future.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>No remarks were provided by the author.</p>
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<h1 id="inventory-for-1988isaak">Inventory for 1988/isaak</h1>
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<h2 id="primary-files">Primary files</h2>
<ul>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.c">isaak.c</a> - entry source code</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.alt.c">isaak.alt.c</a> - alternate source code</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.orig.c">isaak.orig.c</a> - original source code</li>
<li><a href="isaak.output.txt">isaak.output.txt</a> - program output</li>
</ul>
<h2 id="secondary-files">Secondary files</h2>
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<li><a href="1988_isaak.tar.bz2">1988_isaak.tar.bz2</a> - download entry tarball</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/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/1988/isaak/.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/1988/isaak/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
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