{
protected string name;
public Animal(string newName)
{
name = newName;
}
public void Feed()
{
Console.WriteLine("{0} has been fed.", name);
}
}
public class Cow : Animal
{
public Cow(string newName) : base(newName)
{
}
}
public class Chicken : Animal
{
public Chicken(string newName) : base(newName)
{
}
}
class Program
{
static void Main(string[] args)
{
List<Animal> animalCollection = new List<Animal>();
animalCollection.Add(new Cow("Jack"));
animalCollection.Add(new Chicken("Vera"));
foreach (Animal myAnimal in animalCollection)
{
myAnimal.Feed();
}
Console.ReadKey();
}
}
运行结果为：Jack has been fed.
Vera has been fed.