Justify the following statement with the help of a suitable example: “In a class hierarchy of several levels of several levels, if we want a function at any level to be called through a base class pointer then the function must be declared as virtual in the base class”.
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Justify the following statement with the help of a suitable example:
“In a class hierarchy of several levels of several levels, if we want a function at
any level to be called through a base class pointer then the function must be
declared as virtual in the base class”.
Step by step
Solved in 4 steps with 2 images
- Programming language C++ Call the virtual function for an object of each of the derived class. Now call it for the object of the base class.Check the two of the following affirmations that are TRUE. DA reference can be assigned to a different referent after it had been declared and initialized. DAII member function implementation code should be provided in their class declaration. OThe functions float f(int x); and int f(int &x); have the same signature. OPolymorphic behavior comes when you declare a pointer to an object of a base class type and then make it point to an instance of one of its subclasses type.How should a software call a base class virtual function so that it may make use of the same virtual function in a variety of different forms and structures? A base class pointer or reference is required.
- Write a simple C++ code I am a beginner. Subject: Object oriented programming Write a program that has an abstract base class. This class should have four member data variables and a pure virtual function. It should also have a method for setting the data variables. Derive a class from Base class and override a method in the base class. Write a main function that creates an object of derived class and sets the variables. Also write a top-level function that will take a parameter of type base class and return the value of the appropriate (override) function.Write a class Teacher that contains the attribute teacher name, age and address. It alsocontains member function to input and display its attributes. Write another class Author Writeanother class Writer that contains the attributes writer name, address and number of books writtenby him. It also contains member functions to input and display its attributes. Write a third classScholar that inherits both Teacher and Writer classes. Note: Solve this using c++Exercise on class inheritance in C++. General requirements: • All data members must be declared as “private” • No global variable is allowed to be declared and used (constants are ok) • Methods within the class and the requested functions cannot have “cin” or “cout” but it should make use of parameters and return value instead unless it is stated explicitly. • “cin” and “cout” should be used in main() or any testing functions • Please make sure that you clearly show how the C++ class, its methods and all the functions are being called and print out its return value and its results properly Please answer the following questions. 1. Define a class named “BooleanVariable” that manages a variable name (string) and a boolean value (true or false). It should not have default constructor. The class must at least provide the following methods: - toString() method that can return a string in the following format: variable-name(variable-boolean-value) such as isSuccessful(true) -…
- How should an implementation of a virtual function that is defined in a base class do the actual calling of that function?An abstract class a. Cannot be used to declare pointers and references b. Has at least one pure virtual function c. Can be instantiated d. Cannot have any constructorsSuppose the base class and the derived class each have a member function with the same signature. When you have a pointer to a base class object and call a function member through the pointer, discuss what determines which function is actually called—the base class member function or the derived-class function.
- SUBJECT: OOPPROGRAMMING LANGUAGE: C++ ALSO ADD SCREENSHOTS OF OUTPUT. Write a class Distance to measure distance in meters and kilometers. The class should have appropriate constructors for initializing members to 0 as well as user provided values. The class should have display function to display the data members on screen. Write another class Time to measure time in hours and minutes. The class should have appropriate constructors for initializing members to 0 as well as user provided values. The class should have display function to display the data members on screen. Write another class which has appropriate functions for taking objects of the Distance class and Time class to store time and distance in a file. Make the data members and functions in your program const where applicableBoth child class and its parent class have same function signature. Which version of function will be called by the object pointer of parent class that is pointing to the child class’s object? Explain the reason. When do we need to use virtual function? Explain with example programCreate a simple “Car” hierarchy in C++: a base class called Car and derived classes called Toyota, Honda, and Mazda. In the base class, make a virtual function called start( ), and override this in the derived classes. Make a pointer of Car and objects of derived class and call start( ) through the base-class pointers, to verify the behavior of the virtual function.