/div><div class="line">    <span class="keywordflow">if</span> (argc &gt; 2) {</div><div class="line">        addr = argv[2];</div><div class="line">    } <span class="keywordflow">else</span> {</div><div class="line">        addr = <span class="stringliteral">&quot;test.mosquitto.org&quot;</span>;</div><div class="line">    }</div><div class="line"></div><div class="line">    <span class="comment">/* get port number (argv[3] if present) */</span></div><div class="line">    <span class="keywordflow">if</spa