Question

this is just a sample code

 class parent{ //abstact class
        //pure virtual function
        virtual fun=0;
    }
    class child : parent{
        fun;
    }
    main()
    {
           //what should i do here,so i can add parent in vector
        attach(child);
    }
    void attach(parent* p){
        vector.push_back(p); //want to add reference of parent into vecotr
    }

and i want to cast child into parent but not able
to do please any one help me?

Answer 1

The child instance has the type parent (and child). If you have an instance of child, there is no extra instance of parent lying around. You can use a child instance wherever a parent instance is required. There is no need to cast.