35 problem 5

#include<iostream>
#include<string>

using namespace std;


int dm[12] = { 31, 27, 31, 30, 31, 30, 31,30, 31,30,31,30 };

int currentData = 21052019;

int D(int data)
{
    int day = data / 1000000;
    int m = data / 10000;
    m = m % 100;
    int g = data % 10000;
    for (int i = 0; i < m; ++i)
        day += dm[i];
    return day + g * 365;
}

class Persona
{
public:
    virtual void info() = 0;
    virtual void old() = 0;
};
class Enrollee : public Persona
{
protected:
    string vam, fak;
    int data;
public:
    Enrollee(string vam, int data, string fak)
    {
        this->vam = vam;
        this->data = data;
        this->fak = fak;
    }
    void info()
    {
        cout << "Vamilia: " << vam << " Data(dd/mm/gg): " << data << " Fakultet: " << fak << endl;
    }
    void old() override
    {
        int day = D(currentData) - D(data);
        int g = day / 365;
        day %= 365;
        int m = 0;
        for (int i = 0; i < 12; ++i)
            if (day - dm[i] > 0)
            {
                m++;
                day -= dm[i];
            }
        cout << day << " days, " << m << " month, " << g << "Years\n\n";
    }
};
class Student :public Enrollee
{
protected:
    int kurs;
public:
    Student(string vam, int data, string fak, int kurs) : Enrollee(vam, data, fak) { this->kurs = kurs; }
    void info()
    {
        cout << "Vamilia: " << vam << " Data(dd/mm/gg): " << data << " Fakultet: " << fak << " Kurs:" << kurs << endl;
    }

};
class Teacher : public Enrollee
{
protected:
    string dol;
    float staj;
public:
    Teacher(string vam, int data, string fak, string dol, float staj) : Enrollee(vam, data, fak)
    {
        this->dol = dol;
        this->staj = staj;
    }
    void info()
    {
        cout << "Vamilia: " << vam << " Data(dd/mm/gg): " << data << " Fakultet: " << fak << " Doljnost: " << dol << " Staj: " << staj << endl;
    }

};
int main()
{
    int currentData = 00000001;
    Persona *a[3];
    a[0] = new Enrollee("Ivanov", 23 * 1000000 + 12 * 10000 + 1991, "CSIT");
    a[1] = new Student("Sidoriv",  2 * 1000000 +  2 * 10000 + 2000, "CSIT", 2);
    a[2] = new Teacher("Petrova", 25 * 1000000 +  9 * 10000 + 1968, "MexMat", "prepodavatel", 20);
    for (int i = 0; i < 3; ++i)
    {
        a[i]->old();
    }
    for (int i = 0; i < 3; i++)
    {
        delete a[i];
    }
    system("pause");
}