using System;

public class Program

{

    public static void Main()

    {

        Person human = new Person("Daniel", "Bonet", 18);

        human.age = 18;

        human.WriteName();

        Animal dog = new Animal("WAUF!", "Yabadai");

​

        dog.sound = "WAUF!";

        dog.Speak();

    }

        public class Animal

        {

            public string sound;

            public string nombre;

            public Animal(string sound, string nombre)

            {

                this.sound = sound;

                this.nombre = nombre;

            }

            public void Speak()

            {

                System.Console.WriteLine("Croqueta");

            }

        }

        public class Person

        {

            public string firstName;

            public string lastName;

            public int age;

            public Person(string firstName, string lastName, int age)

            {

                this.firstName = firstName;

                this.lastName = lastName;

                this.age = age;

            }

            public string GetFullName()

            {

                return firstName + "" + lastName;

            }

            public void WriteName()

            {

                System.Console.WriteLine(firstName + "" + lastName);

            }

        }

}