#include <iostream>
#include <vector>

using namespace std;

class Bas
{
public:
    void foo() const
    {
        cout << "Fel" << endl;
    }
};

class A : public Bas
{
public:
    void foo() const
    {
        cout << "Rätt! (A)" << endl;
    }
        
};

class C : public Bas
{
public:
    void foo()
    {
        cout << "Rätt! (C)" << endl;
    }
};

int main()
{

    std::vector<Bas> objects {
        A{},
        A{},
        C{},
        C{},
        A{},
    };

    for (Bas b : objects)
    {
        b.foo();
    }
}