The C++ Directive ____ Allows You to Test Whether a Class

question 51

Multiple Choice

The C++ directive ____ allows you to test whether a class has already been defined in a project; it means "if not defined."

• A) #define
• B) #endif
• C) #ifdef
• D) #ifndef

---

Definitions:

Multiple Lines

Refers to text or code that spans over more than one line.

JTextArea

JTextArea is a component in Java Swing that allows for the display and editing of a multi-line area of text.

Listener

A type of object in programming that waits for and responds to events or signals, often used in event-driven programming.

Button Component

A graphical user interface element that users can click to perform an action.