[Dev-C++] accessing derived class methods

[Dane E. <dg...@wo...>]

Per,

Your comments are encouraging. I will read up on dynamic_cast<type> 
(object).

Thank you.

Dane

Begin forwarded message:

> There are solutions to everything. The problem is just to know when  
> the
> solution should be used, and when a program should be written in a
> different way.
>
> using dynamic_cast<type>(object) you can type-safely convert from a  
> base
> class pointer to a pointer for a derived object. If the object isn't a
> derived class, then you will get a NULL pointer instead.
>
> /Per W
>
> On Mon, 19 Sep 2005, Dane Ensign wrote:
>
>
>> Neeraj,
>>
>> Thanks for the input. I was afraid of that. I suppose this holds true
>> always. I was hoping that a nested class with some friend
>> declarations might provide a solution but
>> I accept defeat.
>>
>> Thanks for clearing things up.
>>
>> Dane
>>
>> Begin forwarded message:
>>
>>
>>> Dane,
>>>
>>>    Ideally what you are doing should work the only care which  
>>> must be
>>> taken is that the base class pointers must point to correct derived
>>> class objects and second is that you can't access any function in
>>> derived class which is not defined as virtual in base class.
>>> I mean if getSpecificData() is not defined as virtual in base you  
>>> can
>>> not a derived version of call it using base class pointer.
>>>
>>> Regards
>>> Neeraj
>>>
>>> -----Original Message-----
>>> From: dev...@li...
>>> [mailto:dev...@li...] On Behalf Of Dane
>>> Ensign
>>> Sent: Tuesday, September 20, 2005 8:09 AM
>>> To: dev...@li...
>>> Subject: [Dev-C++] accessing derived class methods
>>>
>>> Hi all,
>>>
>>> I have a simple base class and a few derived classes from it. My  
>>> goal
>>> is to build an array of pointers where I can assign derived class
>>> objects into, then access the different derived class attributes
>>> as needed.
>>>
>>> So I have an employee class. I derive a laborer, scientist, and
>>> manager class from it. I build some basic virtual functions in the
>>> employee class, and each derived class
>>> has a couple of specific attributes that I want to call, like
>>> getSpecificData().
>>>
>>> I made an array of base class pointers then tried accessing the
>>> derived class methods, but it doesnt work. I made an array of void*
>>> pointers and tried to access derived class methods and that doesnt
>>> work.
>>>
>>> I realize that I could build a pure virtual function in the base
>>> class that would only be used to access derived class atrributes,  
>>> but
>>> that is silly. Please can someone point* me in the right direction?
>>>
>>> Thanks for any help you can offer.
>>>
>>> Best regards,
>>>
>>> Dane
>>> da...@de...
>>>
>>>
>>>
>>>
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>>>
>>
>> Dane
>> da...@de...
>>
>>
>>
>>
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>
>
>
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>

Dane
da...@de...