title: Multiple header files in one class C++ (Arduino)
body: <p>I have an class that includes methods from different header files like this:</p>
  
  <pre><code>#include "ICash.h"
  #include "ILock.h"
  
  class control: public ICash, public ILock
  {
    public:
        control();
  
    private:
       void doSomething(int value);
  
  };
  </code></pre>
  
  <p>So now when i make an instance of ICash through control class. 
  where in control.cpp the methodes are declared.</p>
  
  <p>Is is possible to use the method doSomething from control throug the ICash interface?</p>
  
  <p>thanks.</p>