41.C#--里氏转换法--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

            }
        }
        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();

    }

    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");
        }
    }
}

}

41.C#--里氏转换法--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

原文：https://blog.51cto.com/12679593/2386359