Virtual function member : A member function that can be declared within a base class is known as virtual function. A derived class can redefine a virual function member. Preceding the function declaration, a keyword “virtual” is used for creating a virtual function in base class. While inheriting a class with virtual function, the virtual function is redefined by the derived class as per its needs. Virtual function call is been resolved at the run time whereas non virtual member functions resolves at compile time. Virtual function call is computationally more expensive than function call that is non virtual. Virtual functions use pointer invocation, indirection and a few extra instructions are required than normal member functions. The constructor of any class that would contain virtual functions are been required to initialize a table of pointers to its virtual member functions. Non-virtual function member : Non virtual function members are resolved statistically. Non virtual member function is been selected statically based on the type of pointer to the object. Unlike virtual function member, no runtime activities happens in non virtual member functions, since the compiler resoles non virtual functions at compile time based on the type of pointer.

Question

Want to see the full answer?

Answer 1

Question

Chapter 1, Problem 14E

Program Plan Intro

Virtual function member :

A member function that can be declared within a base class is known as virtual function.

A derived class can redefine a virual function member.

Preceding the function declaration, a keyword “virtual” is used for creating a virtual function in base class.

While inheriting a class with virtual function, the virtual function is redefined by the derived class as per its needs.

Virtual function call is been resolved at the run time whereas non virtual member functions resolves at compile time.

Virtual function call is computationally more expensive than function call that is non virtual.

Virtual functions use pointer invocation, indirection and a few extra instructions are required than normal member functions.

The constructor of any class that would contain virtual functions are been required to initialize a table of pointers to its virtual member functions.

Non-virtual function member :

Non virtual function members are resolved statistically.

Non virtual member function is been selected statically based on the type of pointer to the object.

Unlike virtual function member, no runtime activities happens in non virtual member functions, since the compiler resoles non virtual functions at compile time based on the type of pointer.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

What are the major threats of using the internet? How do you use it? How do children use it? How canwe secure it? Provide four references with your answer. Two of the refernces can be from an article and the other two from websites.

Assume that a string of name & surname is saved in S. The alphabetical characters in S can be in lowercase and/or uppercase letters. Name and surname are assumed to be separated by a space character and the string ends with a full stop "." character. Write an assembly language program that will copy the name to NAME in lowercase and the surname to SNAME in uppercase letters. Assume that name and/or surname cannot exceed 20 characters. The program should be general and work with every possible string with name & surname. However, you can consider the data segment definition given below in your program. .DATA S DB 'Mahmoud Obaid." NAME DB 20 DUP(?) SNAME DB 20 DUP(?) Hint: Uppercase characters are ordered between 'A' (41H) and 'Z' (5AH) and lowercase characters are ordered between 'a' (61H) and 'z' (7AH) in the in the ASCII Code table. For lowercase letters, bit 5 (d5) of the ASCII code is 1 where for uppercase letters it is 0. For example, Letter 'h' Binary ASCII 01101000 68H 'H'…

What did you find most interesting or surprising about the scientist Lavoiser?