vtable

#include <iostream>
using namespace std;

class A{
    public:
    virtual void foo(){
        cout << "Hallo A\n";
    }

    virtual void bar(){
        cout << "Bar A\n";
    }

};

class B : A{
    public:
    virtual void foo(){
        cout << "Hallo B\n";
    }
};

typedef void (*foo_ptr)();

int main() {
    // your code goes here
    B a;
    //a.foo();
    void** ref = *(void***)&a;//vtable
    ((foo_ptr)ref[1])();

    return 0;
}