Which member function is used to determine whether the stream object is currently associated with a file?

Which member function is used to determine whether the stream object i

1.	Which member function is used to determine whether the stream object is currently associated with a file?
A.	buf
B.	string
C.	is_open
D.	All of above
E.	None of these
Answer» D. All of above

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Which member function is used to determine whether the stream object is currently associated with a file?

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