I mean the difference
between:
class A
{
public:
friend class
B;
};
and
class A
{
private: //or nothing as the default is
private
friend class B;
};
Is there a difference?
No, there‘s no
difference - you just tell that class B is a friend of class A and now can
access its private and protected members, that‘s all.
friend ---- public and private
原文：http://www.cnblogs.com/hongjiumu/p/3525485.html
class A
{
public:
friend class B;
};
and
class A
{
private: //or nothing as the default is private
friend class B;
};
Is there a difference?
No, there‘s no difference - you just tell that class B is a friend of class A and now can access its private and protected members, that‘s all.