Initialization instance of a derived class that contains object members

Source: Internet
Author: User

# Include <iostream>
Using namespace STD;
Class Base
{

PRIVATE:

Int
A;

Public:

Base (int I)
{A = I; cout <"constructing base A =" <A <Endl;}

~ Base ()
{Cout <"destroying base A =" <A <Endl;
}

};
Class Derived: public Base
{

PRIVATE:

Int
D;

Base
Member;

Public:
// Pass Parameter I to the base-class constructor, and the object member constructor passes parameter J
// Although Member (j) is in the front of the initialization list, the base class constructor is called first, followed by the object member constructor,
// Finally, execute the constructor of the derived class. When there are multiple object members, the calling sequence of these Members depends on the fact that they are in the derived class.
// Explain order

Derived (int I, Int J, int K): Member (J), base (I)

{

D = K;

Cout <"constructing derived d =" <D <Endl;

}

~ Derived ()
{Cout <"destroying derived d =" <D <Endl;
}

};
Void Main ()
{

Derived
D (5, 8, 9 );

}

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.