td>
<td valign="top" align="left"><p>
                Convenient namespace alias
              </p></td>
</tr></table></div>
<p>
            Output:
          </p>
<pre class="programlisting">Area: 16
Area: 0.339837
</pre>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2009-2012 Barend
      Gehrels, Bruno Lalande, Mateusz Loskot<p>
        Distributed under the Boost S