title: How can we build an array of dynamic bitset
body: <p>How can we build an array of dynamic bitset.</p>
  
  <p>for example:</p>
  
  <pre><code>unsigned long long sd=5;
  boost::dynamic_bitset&lt;&gt; bitarry[x]=(sd,"NULL");
  </code></pre>
  
  <p>1- lenght bitarry be calculated separately.</p>
  
  <p>2- content bitarry determin within loop.</p>