Behavioral Design Patterns in C++ - TextPad - I

This lecture builds on the previous one by implementing the command design pattern in a new example. The instructor creates a notepad-like application where users can perform text editing operations via a console-based menu. The lecture emphasizes decoupling the menu from the application to adhere to the single responsibility principle, allowing for a reusable menu class. The instructor also introduces a wrapper for Windows APIs to simplify text property changes.

What is the primary benefit of using the command design pattern as discussed in the lecture?

• It ensures that all commands are executed in parallel.

• It decouples the invoker from the receiver, enhancing flexibility.

• It allows for the invoker and receiver to be tightly coupled.

• It simplifies the code by reducing the number of classes.

In the notepad-like application, which operation is NOT mentioned as a feature?

• Adding text

• Removing text

• Formatting text

• Changing text color

Why does the instructor choose to simulate the user interface through console APIs?

• To ensure compatibility with all operating systems

• To reduce the number of lines of code

• To make the application run faster

• To avoid the complexity of creating a graphical UI

What principle is maintained by creating a separate menu class in the application?

• Interface Segregation Principle

• Open/Closed Principle

• Liskov Substitution Principle

• Single Responsibility Principle

How does the menu class interact with the application class?

• By directly accessing the application's private methods

• By invoking methods without being tightly coupled to their names

• By modifying the application's source code

• By using reflection to call methods dynamically