What is a pure virtual function?
Why is it represented as = 0...how is the internal
implementation for the same
- 3 Answers
- 7709 Views
- CTS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / vikas
A pure virtual function makes a class abstract.0 is used in
its representation to distinguish it from a normal virtual
function. More at
http://www.cppquestions.com/viewtopic.php?f=26&t=14
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / helloworld
I believe pure virtual function is a member function with a
declaration as NULL;
virtual void fun()=0;
Now why zero,since the internal implementation of virtual
function is collection of function pointer ...we intialize
this value of function pointers as NULL.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / viji
A virtual function with a null body is said to be pure
virtual function.
The pure virtual function can be defined later in its
derived class.......
| Is This Answer Correct ? | 3 Yes | 2 No |
What is an adjust field format flag?
State the difference between pre and post increment/decrement operations.
Please explain class & object in c++?
Floating point representation and output seems to be compiler dependent?
What is pointer in c++ with example?
What is the maximum combined length of command line arguments including the space between adjacent arguments?
Are there any special rules about inlining?
simple c++ program for "abcde123ba" convert "ab321edcba" with out using string
Is C++ case sensitive a) False b) Depends on implementation c) True
Specify different types of decision control statements?
What is the use of the this pointer?
Write a C++ program that asks the user to choose a number between 1 and 1000. Then, your program should be able to guess the number by asking the user no more than 10 yes/no questions. Use a while loop in your program
STL 
