title: Class inheritance in more than one file c++
body: <p>I'm trying to make a big class of constances called "Adresy". One .h file isn't enought.</p>
  
  <pre><code>my adresy.h looking like:
  #include &lt;Windows.h&gt;
  #ifndef __Adresy_H_
  #define __Adresy_H_
  
  class Adresy {
      public:
  //first part of constances...
  };
  #endif
  </code></pre>
  
  <p>I want to add extening to this class in second file (for example adresy2.h):</p>
  
  <pre><code>#include "adresy.h"
  class Items: public Adresy {
      public:
  /// NEXT CONSTANCSES
  };
  </code></pre>
  
  <p>How should look second class and how to combine them into one file to including (i don't want to include for example 5 files extending one class)?</p>