using System;

​

namespace InheritancePolymorphism

{

    public class CatTest

    {

        public static void Main(string[] args)

        {

            Console.WriteLine("Create Cat object from Cat(string,int,int)");

            // Create a Cat object via Constructor with 3 parameters:

            // Name of Animal assigned the value "Tom".

            // Age of Cat assigned the value 3

            // Height of Cat assigned the value 20.

            Cat tom = new Cat("Tom",3, 20);

            Console.WriteLine("------");

            Console.WriteLine("Name = {0}", tom.Name);

            Console.WriteLine("Age = {0}", tom.Age);

            Console.WriteLine("Height = {0}", tom.Height);

            Console.WriteLine("------");

            // Call method inherited from Animal

            tom.Sleep();

            // Call Say() method (of Cat)

            tom.Say();

            //Cat function called due to override 

            tom.Move();

            Console.ReadLine();

        }

    }

    public abstract class Animal

    {

        // This is Name field.

        // for example, Tom cat, Jerry mouse.

        public string Name;

        // Default constructor.

        public Animal()

        {

            Console.WriteLine("- Animal()");

            Name = null;

        }

        public Animal(string Name)

        {

            // Assign a value to the Name field.

            this.Name = Name;

            Console.WriteLine("- Animal(string)");

        }

        // Move(): Animal Move.

        // Virtual: Allows the subclass to override this method.

        public virtual void Move()

        {

            Console.WriteLine("Animal Move");

        }

        public void Sleep()

        {

            Console.WriteLine("Sleep");

        }

    }

    public class Cat : Animal

    {

        public int Age;

        public int Height;

        // This is a Constructor with 3 parameters.

        // Using :base(name) to call constructor of parent: Animal(string).

        // The fields of superclass will be assigned values.

        // Then the fields of this class is assigned values.

        public Cat(string name, int Age, int Height)

            : base(name)

        {

            this.Age = Age;

            this.Height = Height;

            Console.WriteLine("- Cat(string,int,int)");

        }

        // This constructor call to default constructor of superclass.

        public Cat(int Age, int Height)

            : base()

        {

            this.Age = Age;

            this.Height = Height;

            Console.WriteLine("- Cat(int,int)");

        }

        public void Say()

        {

            Console.WriteLine("Meo");

        }

        // Override method in parent class.

        // Rewrite this method,

        // to accurately describe the behavior of the cat.

        public override void Move()

        {

            Console.WriteLine("Cat Move ...");

        }

    }

}