OOP: An Overview【c++ primer】

最新推荐文章于 2025-08-12 16:00:16 发布

原创最新推荐文章于 2025-08-12 16:00:16 发布 · 325 阅读

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文章标签：

#c++ #oop #inheritance #reference #binding #class

本文探讨了面向对象编程中继承的概念，以及如何通过继承定义类型之间的关系。此外，还介绍了动态绑定，这是一种允许我们编写能够使用继承层次结构中任何类型的对象的程序的技术。

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Inheritance ：

Inheritance lets us define classes that model relationships among types, sharing what is common and

specializing only that which is inherently different.

那么derived class 就有两种选择，1 。和base class 有一样的opration 2 。与base class 不一样的，可以自己redefine 的opration。对于derived class ，它可以redefine 的opration 是被base class 标志为virtual 的operation。

Dynamic Binding ：

Dynamic binding lets us write programs that use objects of any type in an inheritance hierarchy without caring about the objects' specific types 。

In C++, dynamic binding happens when a virtual function is called

hrough a reference (or a pointer) to a base class. The fact that a

reference (or pointer) might refer to either a base- or a derivedclass

object is the key to dynamic binding. Calls to virtual functions

made through a reference (or pointer) are resolved at run time: The

function that is called is the one defined by the actual type of the
object to which the reference (or pointer) refers.