8lab.friendly classes

#include <iostream>
using namespace std;
class A;

class B{
    int inf;
    public:
    void set_inf(int a){
        inf=a;
    }
    int get_inf(){
        return inf;
    }
    friend class A;
};

class A{
    char c;
    public:
    int infout(B obj){
        return obj.get_inf();
    }
};

int main(){
    A one;
    B two;
    two.set_inf(42);
    cout<<one.A::infout(two)<<endl;

    return 0;
}