Syntax of Virtual Functions
	• Specifying the keyword virtual for any base class member function enables dynamic binding for that function. • Any derived class can override that function by defining a function with the same signature and return type. • The keyword virtual does not need to be re-specified within the derived class. • Once a member function is declared to be virtual in a base class, all functions with that name, signature, and return type in any derived class remain virtual and can be overridden.