¿Puede la función amiga acceder a datos públicos de los miembros de la clase?

Can friend function access public data members of the class?

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.

Accessing data members and member functions: The data members and member functions of class can be accessed using the dot(‘. ‘) operator with the object. For example if the name of object is obj and you want to access the member function with the name printName() then you will have to write obj. printName() .

A friend function cannot access the private and protected data members of the class directly. It needs to make use of a class object and then access the members using the dot operator. A friend function can be a global function or a member of another class.

A friend class is allowed to access any private member, so you can simply invoke methods and modify properties as you would do if they had been public. The friend declaration appears in a class body and grants a function or another class access to private and protected members of the class where the friend declaration appears.

However, this rule does not apply to “friends”. Friends are functions or classes declared with the friend keyword. A non-member function can access the private and protected members of a class if it is declared a friend of that class.

So if Position::displayPositions()is the private method of the Position class that you want to access from GameComponent then you can declare GameComponentas a friend of Position: class Position { friend class GameComponent; Share Improve this answer Follow answered Dec 19 ’12 at 7:43 nogardnogard

Therefore, access to the private member _b is correct in Func1 of class A but not in Func2. A friend class is a class all of whose member functions are friend functions of a class, that is, whose member functions have access to the other class’s private and protected members.