A data member can be member of any class oject or any particular or there can be any

[saneha]

A data member can be member of any class oject or any particular or there can be

any restrictions?

[Vuhelper]

Data member belongs to any particular class. It might be any characteristics or a behaviour of any object belonging to a specific class.
However, when we say that its a data member, then it should be belong to a class.