#include <iostream>
#include <string>

class NPC
{
public:
    NPC(std::string const& name)
        : name {name}
    {}
    virtual ~NPC() = default;

    virtual std::string greeting() const
    {
        return "Hello, my name is " + name;
    }

protected:
    std::string name;
};

class Bandit : public NPC
{
public:
    Bandit(std::string const& name, bool angry)
        : NPC {name}, angry {angry}
    {}

    std::string greeting() const override
    {
        if (angry)
        {
            return "Never should have come here!";
        }
        else
        {
            return NPC::greeting();
        }
    }

private:
    bool angry;
};

class Guard : public NPC
{
public:
    using NPC::NPC;

    std::string greeting() const override
    {
        return "Stop in the name of the jarl! I am " + name;
    }
};

void greet_npc(NPC const& npc)
{
    std::cout << npc.greeting() << std::endl;
}

int main()
{
    NPC saadia {"saadia"};
    Bandit galmar {"galmar", true};
    Bandit hrongar {"hrongar", false};
    Guard lydia {"lydia"};

    greet_npc(saadia);
    greet_npc(galmar);
    greet_npc(hrongar);
    greet_npc(lydia);

    return 0;
}