how to call child class destructor

Question

4.00/5 (2 votes)

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hello,
I have one base class

C++

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

And one child class

C++

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

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

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

Posted 10-Mar-12 22:46pm

Ruchira Patel

Updated 10-Mar-12 23:09pm

Jochen Arndt

v3

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Comments

Sergey Alexandrovich Kryukov 11-Mar-12 16:18pm

The class Child is not a "child" class, it is a derived class.
--SA

1 solution

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Shmuel Zang · Accepted Answer · 2012-03-10T23:08:00

Solution 1

Define the destructor with the virtual keyword:

C++

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

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

Posted 10-Mar-12 23:08pm

Shmuel Zang

Updated 12-Mar-12 11:06am

v3

Comments

Nelek 11-Mar-12 7:51am

If you don't mind try to avoid abbreviations in the answers, not all people are familiar with them. We like correctly written questions, so we should try to give correctly written answers :)

Sergey Alexandrovich Kryukov 11-Mar-12 16:20pm

What do you mean by "shortcuts"? Abbreviations, perhaps? Then I would totally agree. Most abbreviations are not acceptable, except for few very well-known ones.
--SA

Nelek 11-Mar-12 16:35pm

Thanks for the correction. You are right, I wanted to say abbreviations. Edited

Shmuel Zang 12-Mar-12 2:36am

Thank you for the comment. I updated the solution appropriately.

Espen Harlinn 12-Mar-12 19:29pm

5'ed!

Shmuel Zang 13-Mar-12 3:53am

Thanks.