Design pattern#6 Observer Design Pattern with Multiple Real time Example - C++

tutorial on observer design pattern with C++ example with the real-time use case and example's and when to use observer pattern use observer design pattern with real-world example

Assignment Link: will be available soon

Oracle SQL Complete Tutorial/Training/Course for the beginner:
https://www.youtube.com/watch?v=3v4s3XMw4q0&list=PLiLpmqwkwkCt0QeXD8j7BwIoOaBGBRrZC

PlayList On Design Pattern :
https://www.youtube.com/watch?v=8tbxQ2IUtvE&list=PLiLpmqwkwkCsgR__zwKVB0s4bIYrF8vWu

Factory Design Pattern:
https://youtu.be/8tbxQ2IUtvE

Singleton Design Pattern :
https://youtu.be/JWo1OinyNjI

This implementation is with a very simple example and you will understand in a very easy way, I explained in step by step



Definition :
The Observer Pattern defines a one to many dependencies (relationship) between objects so that one object changes its state,
all of its dependents are get notified and updated automatically.

Advantage :
1) There is no need to modify Subject to add or remove observers.
2) It provides the broadcast type communication feature.
3) It provides the decoupling between subject and observers

When to use :
When one object's state changes and must be reflected in another object without keeping the objects tight coupled.
Real time example :
1) Mobile Application notification system in which whenever new update
comes user will get the notification
2) In Website's in which notification triggers in case subscription/follow
like youtube/facebook/qoura etc

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Thanks
Rakesh Malviya