what is the output of x in this part of C++ fragment
<pre><code>switch (x % 5)
{
case 0: cout &lt;&lt; x++ &lt;&lt; '';
case 1: cout &lt;&lt; x-- &lt;&lt; '';
break;
case 2: cout &lt;&lt; ++x &lt;&lt; '';
case 3: cout &lt;&lt; --x &lt;&lt; '';
default: cout &lt;&lt; 2*x &lt;&lt; '';

}
</code></pre>

<p>The question is what is the output in the value of x is 13</p>
