Object Oriented Programming Using C++ (313304) Practical No.21: Write programs to implement virtual function

The concept of virtual function helps to learn the idea of run time polymorphism in C++.

Exercise:

1. What is function overriding?

Answer:

Function overriding is a type of polymorphism in which we redefine the member function of a class that it inherited from its base class. The function signature remains the same but the working of the function is altered to meet the needs of the derived class. So, when we call the function using its name for the parent object, the parent class function is executed. But when we call the function using the child object, the child class version will be executed.

2. Write output for the following code:

Answer:

Output:

C::fun() called

3. There are the following statements that are given below, which of them are correct about virtual functions in C++?

Answer:

2. A and B

Practical Related Questions

1. Define a class parent in which use read function, define another class child use same read function. Display the data of both the read function on output screen using virtual function.

Answer:

2. Write a program that shows the use of function overriding.

Answer:

3. Complete the following table:

Conclusion

We completed Object Oriented Programming Using C++ (313304) Practical No.21 and Write programs to implement virtual function.