c++ get base class object from derived class pointer?

Suppose I have Derived* derivedPtr;

I want Base baseObject from the derivedPtr;

Base baseObject = *derivedPtr; would create the baseObject with the appropriate Base class member variables?

开发者_开发百科

Thank you

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It is Object Slicing

Derived* obj = new Derived;
base objOne = (*obj) ;  // Object slicing. Coping only the  Base class sub-object
                        // that was constructed by eariler statement.

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You can use dynamic casting to accomplish this.

e.g.

Base* baseObject = dynamic_cast<Base*>(derivedPtr);

http://www.cplusplus.com/doc/tutorial/typecasting/

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Yes. That's actually called 'slicing', since you just slice off everything from the derived class.