How do we declare an abstract class?

Question

Admin · Accepted Answer

It is not possible to create abstract classes in C++

Admin · Answer

By declaring the class abstract with the keyword &lsquo;abstract&rsquo;

Admin · Answer

By declaring at least one method abstract using the keyword &lsquo;abstract&rsquo; in a class

Admin · Answer

By providing at least one pure virtual method (function signature followed by ==0;) in a class

Q. How do we declare an abstract class?