Friend function in private section of class

Question

Hi

Refer code below:

What's the use of access specifier for friend function?

In other words, both class A and B works same even though A and B has friend function of overloaded << operator in private and public section... What's the difference?
https://code.sololearn.com/c3XfZ707aGuP/?ref=app

Answer 1

Access specifiers have no effect on friend declarations, therefore there is no difference.