friend class className

 

 

 

friend class ClassName;

 

#include <iostream> class B{    // B declares A as a friend...    friend class A; private:    void privatePrint()    {        std::cout << "hello, world" << std::endl;    }}; class A{public:    A()    {        B b;        // ... and A now has access to B's private members        b.privatePrint();    }}; int main(){    A a;    return 0;}

 

 

 

 

class LinkInterface: publicQThread

{

    Q_OBJECT

    // Only LinkManager is allowed to create/delete or _connect/_disconnect a link

    friend class LinkManager;

}