cat.cs

C#源码及可执行程序

using System;
using System.Collections.Generic;
using System.Text;

namespace delegateObserver
{
    public class Cat
    {
        private List<Animal> list;

        public Cat()
        {        
            list = new List<Animal>();
        }

        public void Add(Animal am)
        {
            list.Add(am);
        }

        public void RemoveAnimal(Animal am)
        {
            if (list.Contains(am))
                list.Remove(am);

        }

        public void Cry()
        {
            Console.WriteLine("Cat is crying...");
            AnimalDo();

        }

        private void AnimalDo()
        {
            foreach (Animal am in list)
            {
                am.Do();
            }
        }
    }
}