C++ Programming - OOPS Concepts - Discussion

Inheritance can be know by IS A relationship.

Composition is known by HAS A relationship (its basically a code reuse).

The question is very inaccurate, it should have been:.

"Of the defining object of one class as a member of another class?".

Compare this with "Of using object of one class inside another class?".

Actually "using" means to have access to an instance by any mean (even as a parameter) and call it's member functions. None of the options match this trivial functionality, but "None" was provided as an option.

I think right will be inheritance as it inherits attributes and behavior of a class to another class.

I agree, thanks @Sunil.

In the name "COMPOSITION" itself indicating that nature of ingredients.

So, here ingredients are objects & nature is is class.

Can anyone explain whats meant by composition in c++?

The process of building complex objects from simple ones is called composition.

In real-life, complex objects are often built from smaller, simpler objects. For example, a car is built using a metal frame, an engine, some tires, a transmission, a steering wheel, and a large number of other parts. A personal computer is built from a CPU, a motherboard, some memory, etc.. Even you are built from smaller parts: you have a head, a body, some legs, arms, and so on. This process of building complex objects from simpler ones is called composition

But this is what the whole concept of Object Oriented Programming. But Question said a feature of OOPS is Composition, I have learned only four of them, and composition is not one of them.

We don't have composition so please can anyone tell what do you mean by composition in c++.