一、如何用接口实现多态?
1.定义一个接口。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace 继承之抽象类
{ public interface people //定义一个接口People
{ void SayHi(); //定义一个SayHi方法 }
}
2.创建两个类Student.c和Teacher.cs继承接口
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace 继承之抽象类
{
class Student:people //继承接口Peoper
{ public void SayHi()
{
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 //继承接口Peoper
{
public void SayHi()
{
Console.WriteLine("你好我是老师");
}
}
}
3.创建一个program.cs类用来输出结果
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();
}
}
}
输出结果: