如何调用子类的析构函数 [英] how to call child class destructor

问题描述

你好，
我只有一个基类

hello,
I have one base class

class Base{
    public:
        Base();
        ~Base();
}

还有一个孩子班

And one child class

   class Child : public Base
   {
       public:
           Base();
           ~Base();
   }

int main()
{
Child *c = new Child();
Base *b = c;
delete b;
return 0;
}

在此代码中，基类的析构函数被调用.我想称呼Child类为Destructor.

In this code , Base class destructor is called. I want to call Child class Destructor. How is it possible?

推荐答案

使用virtual关键字定义析构函数:

Define the destructor with the virtual keyword:

class Base{
public:
Base();
virtual ~Base();
}

另一个问题:Child类的构造函数和析构函数应命名为Child()和virtual ~Child()(而不是Base()和~Base()).

Another issue: The constructor and destructor of the Child class, should be named Child() and virtual ~Child() (instead of Base() and ~Base()).

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