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();
}
}
}