Simple class declaration question
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Thread: Simple class declaration question

  1. #1
    Join Date
    Aug 2009
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    Question Simple class declaration question

    Hello,

    I have seen a class declaration like this:

    class ClassA NewClass public: ClassB

    I can see that ClassB is the base class of NewClass, but I cannot understand why ClassA was put before NewClass... If that program didn't work, I would think it is a bug and simply type:

    class NewClass public: ClassB

    Thanks in advance.

  2. #2
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    Re: Simple class declaration question

    That looks like a syntax error. I suggest that you post the smallest and simplest compilable program that demonstrates it.
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  3. #3
    Join Date
    Aug 2009
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    Re: Simple class declaration question

    Thank you for your reply. Actually this is part of a very large program. Instead, I am providing the comments of the coder right before this line:

    // class NewClass inherits from ClassB,
    // ClassA handles export/import of DLL
    // Enables export and import of functions, data, and objects to and from a DLL.
    // It's not necessary if you do not want to export this class for input in other DLLs:

    I hope this helps.

  4. #4
    Join Date
    Oct 2006
    Posts
    616

    Re: Simple class declaration question

    This is a DLL export macro definition.
    Search in your code for the definition of 'ClassA' - you will probably find an entry such as this one:
    Code:
    #define ClassA __declspec( dllexport )
    See this for explanation on exporting functions / classes from a DLL.

    Regards,
    Zachm

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