Explain why memberwise assignment in a class with a pointer member may create issues
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Q: Explain why memberwise assignment can cause problems with a class that contains a pointer member.
A: Memberwise assignment would cause problems with a class that contains a pointer member.
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Explain why memberwise assignment in a class with a pointer member may create issues.
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- When a pointer to a base class is made to point to a derived class, the pointer ignoresany __________ the derived class performs, unless the function is __________.If a base class has a virtual member function named check(), and a pointer variable ptr of that class is pointing to a derived object, then the code ptr->check(); calls the derived class check function if it is defined.Examine the role of access keywords in defining class members.
- Learning from the "Pointers-Inheritance and Dynamic Polymorphism" and "Pointers and Dynamic Memory - new - delete" example code in the files above, create three classes that exhibit dynamic polymorphism using the functions area(), circumference(), and draw(): Polygon Class Superclass Variables: double width double height Polymorphic Member Functions: area() circumference() draw() Rectangle Class Subclass of Polygon Variables: int size = 5 double* history_width_ptr double* history_height_ptr Constructor/Destructor Constructor creates space in free memory for two arrays that can store previous values of width and height: history_width_ptr = new double[size] // allocate new memory to previous width values history_height_ptr = new double[size] // allocate new memory to previous height values Destructor delete[] history_width_ptr delete[] history_height_ptr Regular Member Functions: set_values() Sets values for height and width based upon user input Then stores…Create a class in C++ called ADDITION has one integer and one float data member. Use pointer to data member to find their sum and print it from main method and also use the concept of dynamic constructor.How can code use pointers or references from the base class to execute the same virtual function so that it may be utilised across multiple data types?
- A(n) __________ member function in a base class expects to be overridden in a derived class.When an object of a derived class is instantiated, the base class’s ____________is called implicitly or explicitly to do any necessary initialization of the base-class data members inthe derived-class object________________involves using a base-class pointer or reference to invoke virtual functionson base-class and derived-class objects
