Which of the following is an example of a class with a pure virtual function in C++?
Question
Which of the following is an example of a class with a pure virtual function in C++?
Solution
A class with a pure virtual function in C++ is known as an abstract class. Here is an example:
class AbstractClass {
public:
// A pure virtual function
virtual void pureVirtualFunction() = 0;
};
In this example, AbstractClass is a class with a pure virtual function pureVirtualFunction(). The = 0 after the function declaration means that the function is pure virtual, and it makes AbstractClass an abstract class.
An abstract class cannot be instantiated, and it is meant to be subclassed. Subclasses of an abstract class must implement all its pure virtual functions.
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