Object-Oriented Modelling

When an object can access another object then that relationship is called aggregation. Objects can exist independently in this relationship. We can define it in a more concise way, aggregation is when an object of one class can own or access the object of another class .

In programming, aggregation is a type of object composition where not all the containing objects should be destroyed when the owning object is destroyed .

In C++, Aggregation is used to represent the ‘HAS-A’ relationship between two objects . It is a type of association. If in a process, one class defines another class as any entity reference then it is known as Aggregation. With the help of aggregation, you can also reuse the class.