Tutorial by Examples

A class or a structure may declare any function it's friend. If a function is a friend of a class, it may access all it's protected and private members: // Forward declaration of functions. void friend_function(); void non_friend_function(); class PrivateHolder { public: PrivateHolder(in...

Methods may declared as friends as well as functions: class Accesser { public: void private_accesser(); }; class PrivateHolder { public: PrivateHolder(int val) : private_value(val) {} friend void Accesser::private_accesser(); private: int private_value; }; void Access...

A whole class may be declared as friend. Friend class declaration means that any member of the friend may access private and protected members of the declaring class: class Accesser { public: void private_accesser1(); void private_accesser2(); }; class PrivateHolder { public: P...