a>(size_type n, bool val = true)
</pre>

<b>Precondition:</b> <tt>n &lt; this-&gt;size()</tt>.<br />
 <b>Effects:</b> Sets bit <tt>n</tt> if <tt>val</tt> is
<tt>true</tt>, and clears bit <tt>n</tt> if <tt>val</tt> is
<tt>false</tt>. <br />
 <b>Returns:</b> <tt>*this</tt>

<hr />
<pre>
dynamic_bitset&amp; <a id=
"reset3">reset</a>(size_type n, size_type len);
</pre>

<b>Precondition:</b> <tt>n + len &lt; this-&gt;size()</tt>.<br />
<b>Effects:</b> Clears every bit indexed from <tt>n</tt> to
<tt>n + len - 1</