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 : public QThread

{

    Q_OBJECT

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

    friend class LinkManager;

}