CS202   7- ‹#›
Static Data Members
•It is important to realize that memory is allocated for static data members when we explicitly define those static data members, not when we declare the static data members as part of a class definition. Think of the static data member declarations within a class as external references to data members defined elsewhere.
•Clients can access a public static data member by saying class_name::static_data_member
•It is also possible for clients to access a public static data member once an object is defined for that class by saying object_name.static_data_member.