C++ Language/Objects/StaticMembers/StaticMemberFunctions
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Most member functions conceptually manipulate one specific object, but a member function marked by the static
keyword is for computation that is collectively about all objects of that class.
The compiler doesn't provide any this
pointer to a static-member-function, so a static-member-function can only access static-data-members.
Whereas an ordinary member function is invoked on a specific object (oObject.DoAction()
), any code may invoke a static-member-function without having any object (simply calling CRType::DoAction()
).