xample">Example</a>
          </h6>
<p>
            Shows how to subtract one polygon from another polygon
          </p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">list</span><span class="special">&gt;</span>

<span class="preprocessor">#include</span> <span class="