The member functions declared outside a class has the following characteristics:
- Data type and number of argument in member function must be same as data types and number of data declared in class definition.
- Type scope resolution operator (::) helps in defining the member function outside the class. It also identifies the function as a member of particular class.
- The different classes can use same member function names. Membership label will resolve their scope limiting a particular class.
- Member function can access private and protected data of a class, but not a non-member function.