title: how to declare template of template class
body: <p>How can declare template of a template class?? see below code:</p>
  
  <pre><code>File: A.h
  class A
  {
      ...
      ...
  };
  
  File: B.h
  template &lt;typename U&gt;
  class B
  {
      ...
      ...
  };
  
  File C.h
  template &lt;class T&gt;
  class C
  {
      ...
      ...
  };
  
  File C.cpp
  //In this file I am able to write template declaration for class A(non-template class)
  #include "A.h"
  template C&lt;A&gt;; //this works fine. 
  
  How can I write the same for class B(which is a template class.)
  #include "B.h"
  template C&lt;What should I write here for class B?&gt;;
  </code></pre>