本文介绍了面向对象编程的三大核心特性：封装、继承和多态。封装实现了数据抽象，保护了内部状态；继承允许创建新的类来继承现有类的属性和方法；多态则提供了动态绑定，使得程序能够更加灵活地处理不同类型的对象。
面向对象的三个基本特征是：封装、继承、多态。
There is no formal definition of object-oriented programming. Hence there is some confusion surrounding what features a programming language must support in order to claim that it is object-oriented. Despite this, however, most agree that in order for a language to claim that it is object-oriented, it must provide support for three major concepts, as inferred from Booch's definition.
- Data encapsulation or data abstraction
- Inheritance or derivation
- Dynamic or runtime binding polymorphism
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