第七章 上机1

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

namespace Day_03_上机练习1.NewFolder1
{
  public  class Instrumet
    {
      public virtual void Play() 
      {
          System.Windows.Forms.MessageBox.Show("乐器在演奏","信息");
      }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Day_03_上机练习1.NewFolder1
{
  public  class Piano:Instrumet
    {
      public override void Play()
      {
          System.Windows.Forms.MessageBox.Show("钢琴在演奏");
      }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Day_03_上机练习1.NewFolder1
{
   public class Sachs:Instrumet
    {
       public override void Play()
       {
           System.Windows.Forms.MessageBox.Show("萨克斯在演奏");
       }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Day_03_上机练习1.NewFolder1
{
   public class Violin:Instrumet
    {
       public override void Play()
       {
           System.Windows.Forms.MessageBox.Show("小提琴在演奏");

       }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Day_03_上机练习1.NewFolder1
{
   public class SE:Instrumet
    {
        public string ID { get; set; }
        public string Name { get; set; }
        public string Riqi { get; set; }
        public SE(string id,string name,string riqi)
        {
            this.ID = id;
            this.Name = name;
            this.Riqi = riqi;
        }
       public void Play(Instrumet ins) 
       {
           ins.Play();
       }
    }
}