wt mean by Friend funtction in c++ ?Explain it?
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If a function is declared has friend in c++ then the function and its members can be accessed by any class in a program.
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A friend function is used for accessing the non-public members of a
class. A class can allow non-member functions and other classes to
access its own private data, by making them friends. Thus, a friend
function is an ordinary function or a member of another class.
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