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  • C#面向对象(四)虚方法实现多态

    一、虚方法实现多态

    1,创建一个people基类

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    
    namespace 继承之抽象类
    {
       public class people
         {
    
            public virtual void SayHi()//定义一个SayHi的虚方法
            { }
        }
    }

    2.创建两个子类Student.cs和Teacher.cs继承基类people

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    
    namespace 继承之抽象类
    {
        class Student : people
        {
            public override void SayHi()      //重写
            {
                Console.WriteLine("你好我是学生");
            }
        }
    }
        using System;
        using System.Collections.Generic;
        using System.Linq;
        using System.Text;
    
        namespace 继承之抽象类
        {
            class Teacher:people  //继承Peoper类
            {
                public override void SayHi()   //重写
                {
                    Console.WriteLine("你好我是老师");
                }
            }
        }

    输出结果:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    
    namespace 继承之抽象类
    {
        class Program
        {
           static List<people> peopers = new List<people>();  //定义一个泛型实例
    
            public static void InitData()
            {
                Student st = new Student();
    
                Teacher tc = new Teacher();
    
                peopers.Add(st);
                peopers.Add(tc);
    
            }
            public static void Start()
            {
                foreach (people peoper in peopers)  //遍历泛型实例
                {
                    peoper.SayHi();
                }
            }
    
            static void Main(string[] args)
            {
                InitData();
                Start();
                Console.ReadLine();
            }
        }
    }

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  • 原文地址:https://www.cnblogs.com/Lhuatao/p/3533910.html
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