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Friendship

Nov 19, 2015 at 7:37pm
Winsu (285)
I have a question,

A function declared as a friend of a derived class has acces to the data member of the base class??.

Thanks

Nov 19, 2015 at 8:08pm
Gamer2015 (810)
Why don't you just try it?

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#include <iostream>

class A {
public:
    A(int val) : val(val) {}
protected:
    int val;
};

class B : public A {
public:
    B(int val) : A(val) {}
    friend void print(const B&);
};

void print(const B& b) {
    std::cout << b.val; 
}

int main()
{
    B b(3);
    print(b);

    return 0;
}
Edit & run on cpp.sh

3


looks like yeah ;)
It has access to everything class B has access to which excludes private data of A
Last edited on Nov 19, 2015 at 8:18pm
Nov 19, 2015 at 8:23pm
Winsu (285)
Ok, thanks, If val was private that function wouldn't have access then, wasn't it?
Nov 20, 2015 at 2:35pm
Gamer2015 (810)
yeah, exactly.
But B doesn't have access to it either so it would be pretty weird if it would work that way :)
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