void Pharmacy::out_of_date() {
    int day, month, year;
    Medicine** expired = new Medicine*[medicine.size()];
    int expired_size = 0;
    cout << "enter today's date:";
    get_date(day, month, year);
    for (int i = 0; i < medicine.size(); i++) {
        if (medicine.get(i)->get_year() < year) {
            expired[expired_size++] = medicine.get(i);
        }
        else if (medicine.get(i)->get_year() == year) {
            if (medicine.get(i)->get_month() < month) {
                expired[expired_size++] = medicine.get(i);
            }
            else if (medicine.get(i)->get_month() == month) {
                if (medicine.get(i)->get_day() <= day) {
                    expired[expired_size++] = medicine.get(i);
                }
            }
        }
    }
    for (int i = 0; i < expired_size; i++) {
        cout << "\n" << i + 1 << ".\n";
        expired[i]->out();
    }
    cout << "do you want to delete these meds from the list? y/n ";
    char del_choice;
    cin >> del_choice;
    if (del_choice == 'y') {
        for (int i = 0; i < expired_size; i++) {
            for (int j = 0; j < medicine.size(); j++)
            {
                if (medicine.get(j) == expired[i])
                {
                    cout << "deleting: " << *(medicine.get(j)->get_name()) << "\n";
                    medicine.del(j);
                    break;
                }
            }
        }
    }
}