How can I overload abstract constructor in derived class
<p>I have an abstract constructor and a derived class like follows:</p>

<pre><code>abstract ab {
  ab();
}

class dc {
  dc();
}
</code></pre>

<p>I want to execute first the constructor of the derived class and then execute the constructor of the abstract class</p>

<p>Please give me an example.</p>
