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Answer Posted / mital
A friend function is used in object-oriented programming to
allow access to private or protected data in a class from
outside the class. Normally a function which is not a
member of a class cannot access such information; neither
can an external class. Occasionally such access will be
advantageous for the programmer; under these circumstances,
the function or external class can be declared as a friend
of the class using the friend keyword. The function or
external class will then have access to all information –
public, private, or protected – within the class.
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