What is difference between Aggregation and composition in Object oriented programming?

Question

Can someone explain the difference between Aggregation and composition in c++ (object oriented programming ).

Answer 1

Aggregation is a form of Association where all objects have their own lifecycle, but there is ownership, and child objects can not belong to another parent object.

Composition is a form of Aggregation. It is a strong type of Aggregation. Child objects do not have its lifecycle and if the parent object is deleted, all child objects will also be deleted.

An example would be:

A "owns" B = Composition : B has no meaning or purpose in the system without A.

A "uses" B = Aggregation : B exists independently (conceptually) from A.

I hope this helps and happy coding! ✌️😉 Good luck.

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https://stackoverflow.com/questions/885937/what-is-the-difference-between-association-aggregation-and-composition

https://softwareengineering.stackexchange.com/questions/255973/c-association-aggregation-and-composition