What does "class className;" by itself do in C++?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/4757565/c-forward-declaration">C++ - Forward declaration</a>  </p>
</blockquote>



<p>so in my header file i have a class defined/declared with all it features named <strong>User</strong></p>

<p>then in a .cpp source file there is near the top <code>class User;</code></p>

<p>im new to c, but couldnt find an answer in the few tutorials i looked into so came here</p>

<p>what does it do ?</p>

<p>thankyou.</p>
