static void Main(string[] args)
{
Person person = new Person("Petro", "Petrov", new DateTime(1999, 5, 6));
Person person2 = new Person(person);
LibraryUser library_user = new LibraryUser("Sasha", "Kotenko", new DateTime(2002, 5, 2), 1023, new DateTime(2018, 9, 1), 30);
Entrant entrant = new Entrant(200, 11.9, "Ushomyr Gymnasium");
entrant.SetName("Sasha");
entrant.SetSurname("Kotenko");
entrant.SetBirthDate(new DateTime(2002, 5, 2));
string EntrantName = entrant.GetName();
Student student = new Student("Andrew", "Gras", new DateTime(2001, 12, 15), 1, "15BD-POkt", "Fiz-mat", "ZDU");
student.SetPointsEdDocument(8.2);
Teacher teacher = new Teacher("Teacher of Programming", "Informatics", "Fiz-mat", "ZDU");
teacher.SetName("Oleg");
teacher.SetSurname("Taburetkin");
teacher.SetBirthDate(new DateTime(1980, 11, 17));
teacher.SetReadersTicketNumber(1124);
teacher.SetDateOfIssue(new DateTime(2007, 9, 5));
teacher.SetSizeOfReadersContribution(55);
Teacher teacher2 = new Teacher(teacher);
Console.WriteLine();
Console.ReadLine();
}
public LibraryUser(LibraryUser obj)
{
obj = new LibraryUser();
}