id="cb22-2"><a href="#cb22-2" aria-hidden="true" tabindex="-1"></a><span class="co">// ...</span></span>
<span id="cb22-3"><a href="#cb22-3" aria-hidden="true" tabindex="-1"></a><span class="dt">array</span>[<span class="dv">2</span>] <span class="dt">matrix</span>[<span class="dv">3</span>, <span class="dv">4</span>] a;</span>
<span id="cb22-4"><a href="#cb22-4" aria-hidden="true" tabindex="-1"></a>a = m[<span class="dv">1</span>, <span class="dv">2</span>:<span class="dv">3</span>];  <span class="co">// k