构造函数和析构函数调用 [英] Constructor and destructor Calls

问题描述

当我们创建一个派生类的对象时，为什么构造函数以自上而下的方式调用(首先是基构造函数，然后是派生构造函数)，而析构函数被称为自下而上(首先是派生构造函数，然后是基构造函数)

When we create an object of a derived class, why are the constructors called in a top-to-bottom fashion (first the base constructor, then derived constructor) and are destructors called bottom-to-top (first derived constructor, then base constructor)

推荐答案

为了向新手解释，假设您正在建造一座新建筑.

To explain for newbies, consider you are constructing a new building.

你建造地下室，一楼，二楼.摧毁 时，你摧毁 2 层、1 层和地下室.

You Construct basement, first floor, 2nd floor. While destroying , you destroy 2nd Floor, First Floor, and basement.

以同样的方式，对象的构造/销毁发生在 C++ 中.

The same way, construction/destruction of a object happens in C++.

希望这有助于理解.

这篇关于构造函数和析构函数调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！