lusively.<br />
<b>Returns:</b> <tt>*this</tt>

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<pre>
dynamic_bitset&amp; <a id="flip2">flip</a>(size_type n)
</pre>

<b>Precondition:</b> <tt>n &lt; this-&gt;size()</tt>.<br />
<b>Effects:</b> Flips bit <tt>n</tt>.<br />
<b>Returns:</b> <tt>*this</tt>

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<pre>
size_type <a id="size">size</a>() const
</pre>

<b>Returns:</b> the number of bits in this bitset.<br />
<b>Throws:</b> nothing.

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<pre>
size_type <a id="num_blocks">num_blocks</a>() const
</pre>

<b>Returns:</b> the number of block