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| using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
internal interface Warning
{
String Situation { get; set; }
void Warn();
void Add(PeopleInSchool p);
void Sub(PeopleInSchool p);
}
class PoliceStation : Warning
{
private IList<PeopleInSchool> field = new List<PeopleInSchool>();
string situation;
public string Situation
{
get { return situation; }
set { situation = value; }
}
public void Warn()
{
foreach (PeopleInSchool p in field)
{
p.WarningReceived();
}
}
public void Add(PeopleInSchool p)
{
field.Add(p);
}
public void Sub(PeopleInSchool p)
{
field.Remove(p);
}
}
class EarthquakeDepartment : Warning
{
string situation;
private IList<PeopleInSchool> field = new List<PeopleInSchool>();
public string Situation
{
get { return situation; }
set { situation = value; }
}
public void Warn()
{
foreach (PeopleInSchool p in field)
{
p.WarningReceived();
}
}
public void Add(PeopleInSchool p)
{
field.Add(p);
}
public void Sub(PeopleInSchool p)
{
field.Remove(p);
}
}
abstract class PeopleInSchool
{
protected Warning field;
public PeopleInSchool(Warning w)
{
field = w;
}
public abstract void WarningReceived();
}
class Teacher : PeopleInSchool
{
public Teacher(Warning w)
: base(w)
{
}
public override void WarningReceived()
{
Console.WriteLine("我是老师" + field.Situation);
}
}
class Student : PeopleInSchool
{
public Student(Warning w)
: base(w)
{
}
public override void WarningReceived()
{
Console.WriteLine("我是学生" + field.Situation);
}
}
class Client
{
public static void Main()
{
PoliceStation p = new PoliceStation();
Teacher t = new Teacher(p);
Student s = new Student(p);
p.Add(t);
p.Add(s);
p.Situation = "有恐怖袭击！！！";
p.Warn();
p.Situation = "注意防火防盗！！！";
p.Warn();
EarthquakeDepartment e = new EarthquakeDepartment();
t = new Teacher(e);
s = new Student(e);
e.Add(t);
e.Add(s);
e.Situation = "要地震了！！！";
e.Warn();
Console.Read();
}
}
}
|
