using System;

/*

public

private

protected

internal

*/

​

public class Person

{

    public string firstName;

    public string lastName;

    public int age;

    public string phone;

    public Person()

    {

        firstName = "none";

        lastName = "none";

        phone ="none";

        age = 0;

    }

    public void Show()

    {

        Console.WriteLine("{0} {1}, вік: {2}, телефон: {3}", firstName, lastName, age, phone);

    }

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World\n");

        Person p1 = new Person();

        p1.Show();

        p1.firstName = "Nazarii";

        p1.lastName = "Hond";

        p1.age = 30;

        p1.phone = "23567890-9654324567";

        p1.Show();

        Person p2 = new Person(){ firstName = "Oleg", lastName = "Petrovuch", age = 25, phone = "0898678576474" };

        p2.Show();

    }

}