An overridden base class function may be called by a function in a derived class by using the _______ operator.

To properly solve this problem, we need to understand what a base class and derived class are in object-oriented programming. A base class is a general class from which other classes are derived. A derived class is a specialized version of the base class, inheriting its properties and methods. Function overriding is when a derived class provides a new implementation for a method that exists in the base class.

The operator used to call an overridden base class function from a derived class function is called the "scope resolution operator" (::). It allows access to the base class's overridden method.

Let's see an example of how to use the scope resolution operator to call an overridden base class method: Consider the following base class (Parent) and derived class (Child): ```cpp class Parent { public: void display() { cout << "Parent class function" << endl; } }; class Child : public Parent { public: void display() { cout << "Child class function" << endl; } void showParentDisplay() { Parent::display(); // Using the scope resolution operator to call the Parent class's display() method } }; ``` In the example, we have a Parent class with a display() function and a Child class that overrides the display() function. In the Child class, we also have a showParentDisplay() function, which uses the scope resolution operator (Parent::display();) to call the display() function of the Parent class.