dcsimg
Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: C++
Expertise: Beginner
Mar 28, 1997

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Calling the Operator =

Question:
How can I call the operator= of the base class from the operator= in the derived class?

The data member in the base class is a private data member. I want to be able to use operator = in the derived class and call the operator = in the base class

Answer:
I am assuming that the copy assignment operator in the base class is either public or protected so that you can use it from the derived class. Given that assumption, here is a code snippet that does the exact same thing.

class Base
{
protected:
	const Base &operator = (const Base &rhs)
	{
		data = rhs.data;
		return *this;
	}
private:
	int data;
};

class Derived  : public Base
{
public:
	const Derived &operator =(const Derived &rhs)
	{
		// call base classes assignment first 
		Base::operator=(rhs);

		data = rhs.data;
		return *this;
	}
private:
	int data;
};
DevX Pro
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date