using System;

public class Program

{

    public static void Main()

    {

    }

     class Person

    {

        public string name;

        public int age;

        public Person(string n)

        {

            age = 18;

            name = n;

        }

        public Person(Person p)

        {

            name = p.name;

            age = p.age;

        }

        public Person()

        {

            Console.WriteLine("Enter name");

            name = Console.ReadLine();

            Console.WriteLine("Enter age");

            age = int.Parse(Console.ReadLine());

        }

​

        public void output()

        {

            Console.WriteLine(name);

            Console.WriteLine(age);

        }

​

        static void Main(string[] args)

        {

            Person object1 = new Person();

            object1.output();

            Person object2 = new Person();

            object2.output();

            Person object3 = new Person("BOB");

        }

    }

}

​