><span class="p">;</span>
<span class="n">li</span><span class="p">.</span><span class="n">append</span><span class="p">(</span><span class="mi">3</span><span class="p">);</span>
<span class="n">li</span><span class="p">.</span><span class="n">append</span><span class="p">(</span><span class="mi">7</span><span class="p">);</span>
</pre></div>
</div>
<p>Print out the demo list</p>
<div class="highlight-c++"><div class="highlight"><pre><span></span><span class="n">std</span><span class="o">::</span><span clas