1.cpp

#include <iostream>

#include <functional>

class Item;

typedef  std::function<void(int, const Item&)> Action;

class Item 

{

public:

    Item(Action act, int y) : action_(act), y_(y){}

    void do_action(int x){action_(x, *this);}

    int y_;

private:

    Action action_;

};

int main()

{

    Action a = [](int x, const Item& item) {std::cout << "Wert x:  " << x << " Wert y: " << item.y_ << "\n";};

    Item it1(a, 3);

    Item it2(a, 9000);

    it1.do_action(5);

    it2.do_action(55);

}