What is the difference between Friend Functions and Friend classes? How could they be useful or used?

Question

Real life analogy helpful

Answer 1

you are a good player for challenger. !

Answer 2

If you declare a function as friend, then that function can access class's private members. On the other hand, if you declare class B as a friend class of the class A then every method of class B is a friend function to class A and can access its private members.
Most common uses are quick fixes in long programs or overloading binary operators,etc.

Answer 3

Thank you 😁