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Also, does it matter where in the class you declare the friend ? Does it matter if you add a friend class or a friend function ?
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Friend Class A friend class can access private and protected members of other class in which it is declared as friend. It is sometimes useful to allow a particular class to access private members of other class. For example, a LinkedList class may be allowed to access private members of Node.
Which of the following is correct about friend functions? Explanation: Friend function can be declared either in private or public part of the class. A friend function cannot access the members of the class directly. They use the dot membership operator with a member name.
Friend functions of the class are granted permission to access private and protected members of the class in C++. They are defined globally outside the class scope. Friend functions are not member functions of the class.
A friend function in the class declaration doesn't violate encapsulation any more than a public member function violates encapsulation: both have exactly the same authority with respect to accessing the class's non-public parts.)
No it doesn't. It's a purely compile-time thing: similar to access modifiers themselves.
Despite the fact that you write the declaration inside the class, you don't really add a friend to a class. You'd basically declare something else as a friend of the class and simply allow it to access the class's private members, as if they were public.
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As mentioned already, it is purely a compile-time mechanism.
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