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If static data members have to be used inside a class, those member functions _______________

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If static data members have to be used inside a class, those member functions _______________

(a) Must not be static member functions

(b) Must not be member functions

(c) Must be static member functions

(d) Must not be member function of corresponding class

I had been asked this question in exam.

My enquiry is from Static Data Members topic in portion Exception Handling & Static Class Members of Object Oriented Programming

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Right option is (c) Must be static member functions

The explanation is: Only the static member functions can access the static data members. The definition of static members is made common and hence the member function should be capable of manipulating the static data members.

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