namespace _41.里氏转换法 { class Program { //创建10个对象 通过一个循环 去调用他们各自打招呼的方法 //1、里氏转换 //1)、子类可以赋值给父类 //2)、如果父类中装的是子类对象，那么可以将这个父类强转为子类对象。 static void Main(string[] args) { Person[] pers = new Person[10]; //新建10个对象 Random r = new Random(); //声明一个随机数 for (int i = 0; i <pers.Length; i++)//通过循环给Person赋值 { int rNmuber = r.Next(1, 8); switch (rNmuber) { case 1:pers[i] = new Student(); //当1-7时，子类赋值给父类 break; case 2:pers[i] = new Teacher(); break; case 3:pers[i] = new Doctor(); break; case 4:pers[i] = new Police(); break; case 5:pers[i] = new Nurse(); break; case 6:pers[i] = new Driver(); break; default:pers[i] = new Person(); break;
}
}
for (int i = 0; i < pers.Length; i++) // 通过一个for循环进行取值
{
if(pers[i] is Student) //如果可以转成student
{
((Student)pers[i]).StudentSayHello(); //父类强转成子类，然后调用打招呼方法
}
else if(pers[i] is Teacher) //如果可以转成Teacher
{
((Teacher)pers[i]).TeacherSayhello();//父类强转成子类，然后调用打招呼方法
}
else if(pers[i] is Doctor)
{
((Doctor)pers[i]).DoctorSayHello(); //父类强转成子类，然后调用打招呼方法
}
else if(pers[i] is Police)
{
((Police)pers[i]).PoliceSayHello(); //父类强转成子类，然后调用打招呼方法
}
else if(pers[i] is Nurse)
{
((Nurse)pers[i]).NurseSayHello(); //父类强转成子类，然后调用打招呼方法
}
else if(pers[i] is Driver)
{
((Driver)pers[i]).DriverSayHello(); //父类强转成子类，然后调用打招呼方法
}
else
{
pers[i].PersonSayHello();
}
}
Console.ReadKey();
}
//新建类 public class Person //父类 { public void PersonSayHello() { Console.WriteLine("我是父类"); } } public class Student:Person { public void StudentSayHello() { Console.WriteLine("我是学生"); } } public class Teacher : Person { public void TeacherSayhello() { Console.WriteLine("我是老师"); } } public class Doctor:Person { public void DoctorSayHello() { Console.WriteLine("我是医生"); } } public class Police : Person { public void PoliceSayHello() { Console.WriteLine("我是警察"); } } public class Nurse : Person { public void NurseSayHello() { Console.WriteLine("我是护士"); } } public class Driver:Person { public void DriverSayHello() { Console.WriteLine("我是司机"); } } } }
