If a base class has a virtual function named print, and a pointer variable of that class is pointing to a derived object, then the code ptr-print ); calls
A) the base class print function
B) the derived print function
C) both the derived and base print functions
D) it causes a run-time error

Question

If a base class has a virtual function named print, and a pointer variable of that class is pointing to a derived object, then the code ptr->print ); calls
A) the base class print function
B) the derived print function
C) both the derived and base print functions
D) it causes a run-time error

Quizplus · Accepted Answer

The virtual function keyword ensures that the derived class implementation of the function is called when a pointer to the derived class is being used. Therefore, the code ptr->print(); will call the print function of the derived class.

If a Base Class Has a Virtual Function Named Print