fier">outer</span><span class="special">().</span><span class="identifier">push_back</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span> <span class="identifier">y</span><span class="special">));</span>
        <span class="special">}</span>

        <span class="comment">// display new polygon</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identif