#include <iostream>
    using namespace std;
    struct A;
    struct B 
    {
        void fun1(A*);
    };
    struct A 
    {
        private:
        int k;
        public:
        void initialize(); 
        friend void fun2(A* , int);
        friend void B :: fun1(A*);
        friend struct C;
        friend void fun3();
    };
    void A :: initialize() 
    {
        k = 0;
    }
    void fun2(A* a, int k) 
    {
        a -> k = k;
    }
    void B :: fun1(A * a) 
    {
        a -> k = 35;
        cout << a->k;
    }
    struct C
    {
        private:
        int L;
        public:
        void initialize();
        void fun2(A* a);
    };
    void C::initialize() 
    {
        L = 45;
    }
    void C::fun2(A* a) 
    {
        a -> k += L;
    }
    void fun3() 
    {
        A a;
        a.k = 150;
        cout << a.k;
    }
    int main() 
    {
        A a;
        C c;
        c.fun2(&a);
        cout << "Data accessed";
    }