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Two Dimensional Arrays
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<i class="fa fa-calendar"></i><time datetime="2015-02-08T00:00:00-06:00"> Sun 08 February 2015</time>
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<h3 id="definition">Definition</h3>
<p>In a fundamental way, two dimensional arrays are rather similar two one dimentional arrays, as the processor treats it as an <em>extended</em> one dimensional array. For the user, however, the net effect is effectively different. Two dimensional arrays are best represented, by a two dimensional matrix of information. However, the notion of an array of arrays is also valid, and, as a matter of fact, useful for grasping the concept of its syntax and declaration. </p>
<h3 id="essential-operations">Essential operations</h3>
<ul>
<li>Declaration and assignment</li>
<li>Looping <ul>
<li>Requires two indexes and loops</li>
</ul>
</li>
<li>Vertical and/or horizontal rotation</li>
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<h4 id="c-like-syntax">C-like syntax</h4>
<div class="highlight"><pre><span class="c1">// Declaration</span>
<span class="kt">int</span> <span class="n">an_array</span><span class="p">[</span><span class="mi">3</span><span class="p">][</span><span class="mi">2</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span>
<span class="p">{</span><span class="mi">1</span><span class="p">,</span><span class="mi">2</span><span class="p">},</span>
<span class="p">{</span><span class="mi">4</span><span class="p">,</span><span class="mi">5</span><span class="p">},</span>
<span class="p">{</span><span class="mi">7</span><span class="p">,</span><span class="mi">8</span><span class="p">},</span>
<span class="p">}</span>
<span class="c1">// When used as function argument, its size must be given first.</span>
<span class="kt">int</span> <span class="n">an_arrayFunction</span><span class="p">(</span><span class="kt">int</span> <span class="n">sizex</span><span class="p">,</span> <span class="n">sizey</span><span class="p">,</span> <span class="n">anrray</span><span class="p">[</span><span class="n">sizey</span><span class="p">][</span><span class="n">sizex</span><span class="p">]);</span>
</pre></div>
<h3 id="additional-resources">Additional resources</h3>
<h4 id="graphics">Graphics</h4>
<p><a href="http://www.mat.univie.ac.at/~kriegl/Skripten/CG/node25.html">Midpoing line algorithm</a>
<a href="http://www.asksatyam.com/2011/01/midpoint-circle-algorithm.html">Midpoint cirle algorithm</a></p>
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