The line:
Virtual double functionX) const = 0;
In a class definition indicates that the class is probably a:
A) Base class.
B) Derived class.
C) Protected class.
D) Library class.

Question

Quizplus · Accepted Answer

The use of the "virtual" keyword and the "= 0" syntax in the function declaration indicates that this is a pure virtual function, which means it has no implementation in the base class and must be implemented in any derived classes. This is a common feature in base classes used for inheritance.

The Line: Virtual Double FunctionX) Const = 0;