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This article mainly explains "how to realize the Phone class". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to realize the Phone class".

Decorator Pattern removes the decoration function from the class, thus simplifying the original class. Create a new class to handle these decorative functions.

Decoration mode: dynamically add some additional responsibilities to an object. In terms of added functionality, the decoration mode is more flexible than generating subclasses. Sometimes we want to add some functionality to an object rather than to the entire class. For example, there is a mobile phone that allows you to add features to the phone, such as adding pendants, screen stickers, and so on. A flexible way of design is to embed the phone into another object, which completes the addition of features, which we call decoration. This decoration is consistent with the interface of the component it decorates, so it is transparent to customers who use the component. The UML diagram of the decoration pattern is shown below.

In this design, the decorative function of the mobile phone is independent and can be developed independently, thus simplifying the design of specific mobile phones. The following is the implementation of the Phone class:

/ / Public abstract class class Phone {public: Phone () {} virtual ~ Phone () {} virtual void ShowDecorate () {}}

The definition of specific mobile phone class

/ / specific class iPhone: public Phone {private: string cout; / / Mobile name public: iPhone (string name): m_name (name) {} ~ iPhone () {} void ShowDecorate () {cout

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