Создать класс EMPLOYEE, производный от класса PERSON и использовать их для вычисления зарплаты сотрудника

#include <iostream>
#include <string>
 
class Person
{
public:
    Person(const std::string & Name, size_t Age) :
        m_Name(Name), m_Age(Age) {}
    const std::string & GetName() const { return m_Name; }
    size_t GetAge() const { return m_Age; }
private:
    std::string m_Name;
    size_t      m_Age;
};
 
class Employee : public Person
{
public:
    Employee(const std::string & Name, size_t Age, const std::string & Position, size_t Salary) :
            Person(Name, Age), m_Position(Position), m_Salary(Salary) {}
    
    const std::string & GetPosition() const { return m_Position; }
    size_t GetSalary(size_t premium = 0) { return CalculateSalary(premium); }
private:
    size_t CalculateSalary(size_t premium) { return (m_Salary + m_Salary * premium / 100); }
private:
    std::string m_Position;
    size_t m_Salary;
};
 
int main()
{
    Employee em("Van Bethoven", 55, "locksmith", 885);
 
    std::cout << "Salary of " << em.GetName() << " without premium is " << em.GetSalary() << std::endl;
    std::cout << "Salary of " << em.GetName() << " with 50% premium is " << em.GetSalary(50) << std::endl;
 
    std::cin.get();
    return 0;
}