EBK DATA STRUCTURES AND ALGORITHMS IN C
4th Edition
ISBN: 9781285415017
Author: DROZDEK
Publisher: YUZU
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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.
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EBK DATA STRUCTURES AND ALGORITHMS IN C
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- Is that the case?Pointers or references are required for virtual functions that are dynamically bound.arrow_forwardIs that right?For functions that are flexibly bound, you need pointers or references.arrow_forwardThe effectiveness of user-defined functions much exceeds that of pre-defined ones.arrow_forward
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