Полиморфизм в C++: практическое использование переопределния виртуальных функций

#include <iostream>
class Human
{
private:
    std::string name;
public:
    Human(std::string inName) { name = inName; }
    std::string getName() { return name; }
    virtual void work()  
    {
        std::cout << "And it gives mony for him or her!!!" << std::endl;
    }
};
 
class Programmer : public Human
{
public:
    Programmer(std::string name) : Human(name) {}
    void work() override
    {
        std::string text = this->getName() + " is writing code";
        std::cout << text.c_str() << std::endl;
        Human::work();
    }
};
 
class Medic : public Human
{
public:
    Medic(std::string name) :Human(name) {};
    void work()
    {
        std::string text = this->getName() + " is treating people";
        std::cout << text.c_str() << std::endl;
        Human::work();
    }
};
 
class BOB : public Programmer
{
public:
    BOB() : Programmer("Bob") 
    {
        std::cout << "Bob was born" << std::endl;
    }
};
 
 
class MARY : public Medic
{
public:
    MARY() : Medic("Mary")
    {
        std::cout << "Mary was born" << std::endl;
    }
};
 
int main()
{
    MARY *Mary = new MARY();
    std::cout << std::endl;
    BOB *Bob = new BOB();
        std::cout << std::endl;
    Mary->work();
    std::cout << std::endl;
    Bob->work();
    std::cout << std::endl;
    system("pause");
    return 0;
}