[note 1]
The type and scope of each static member variable must be defined outside the class definition.
[form]:
- type class-name::static-member-name
- type class-name::static-member-name=initial-value
[note 2]
Static member functions can have only other static members declared in the same class.
A static class can be called using the class name (instead of its object name) as follows
- class-name::function-name
[note 3]
- A constant object can call only const member functions.
- A constant object can call only const member functions.
Whenver const objects try to invoke non-const member functions, the compiler generates errors.
[note 4]
Define a pointer to the member
int A:: * ip= &A::m
The ip pointer acts like a class member in that it must be invoked with a class object.
[note 5]
Friend function can’t be invoked by using objects, while it can be invoked like a normal function without the help of any objects.
Friend function can be declared either in the public or the private part of a class without affecting its meaning.
Member function of one class can be friend functions of another class.
