From: use_my_alias_here_at_hotmail_com@tellus.orb.dotsrc.org   
      
   Hi,   
      
   I have no question about the namespace in the header file, so for this   
   post we declare it like this.   
      
   // MyClass.hpp   
   #pragma once   
      
   namespace MyProduct   
   {   
   class MyClass   
   {   
   public:   
        void myMethod();   
   };   
   }   
      
      
   Now, for the source file I've seen at least three variants.   
      
   A)   
   // MyClass.cpp   
   #include "MyClass.hpp"   
      
   namespace MyProduct   
   {   
   void MyClass::myMethod()   
   {   
        // ...   
   }   
   }   
      
      
   B)   
   // MyClass.cpp   
   #include "MyClass.hpp"   
      
   void MyProduct::MyClass::myMethod()   
   {   
        // ...   
   }   
      
      
   C)   
   // MyClass.cpp   
   #include "MyClass.hpp"   
      
   using namespace MyProduct;   
      
   void MyClass::myMethod()   
   {   
        // ...   
   }   
      
      
   Are there more variants?   
   What are the pros and cons with these?   
      
      
   Thanks,   
   Daniel   
      
      
   PS. It's striking how little information there is about this topic. I   
   would hope we can come up with a good summary to be put on C++ FAQ   
   Lite.   
      
      
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