test2-11

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test2_11
{
class Animal
{
private bool m_sex;
private string m_sound;
public Animal()
{
m_sex = false;
m_sound="HOW1...";
}
public bool Sex
{
get { return m_sex; }
set { m_sex = value; }
}
public string Sound
{
get { return m_sound; }
set { m_sound = value; }
}
public virtual string Roar()
{
return m_sound;
}

}
class Dog:Animal
{
public Dog()
{
Sex = true;
Sound = "Wow...";
}
public override string Roar()
{
return "Dog:" + Sound;
}
}
class Cat:Animal
{
public Cat()
{
Sound = "Miaow...";
}
public override string Roar()
{
return "Cat:" + Sound;
}
}
class Cow:Animal
{
public Cow()
{
Sound = "Moo...";
}
public override string Roar()
{
return "Cow:" + Sound;
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test2_11
{
class Program
{
static void Main(string[] args)
{
Animal animal = new Animal();
Dog d = new Dog();
Cat c = new Cat();
Cow w = new Cow();
animal = d;
Console.WriteLine(animal.Roar());
animal = c;
Console.WriteLine(animal.Roar());
animal = w;
Console.WriteLine( animal.Roar());
}
}
}