面向对象编程三大特性（csharp）

1.封装
2.继承
3.多态
不扯别的，看代码就好…

using System;
//程序的声明
namespace demo0709
{
    //类名
    class Program
    {
        //主程序的入口
        static void Main(string[] args)
        {
            //多态性
            Transport transport = new Bus();
            transport.reduceSpeed();
            transport.increaseSpeed();
            Console.ReadKey();
        }
    }


    //交通工具类
    class Transport
    {
        private int id;
        private string name;
        public Transport()
        {
        }
        public Transport(int id, string name)
        {
            this.id = id;
            this.name = name;
        }
        public override string ToString()
        {
            return this.id+"----"+this.name;
        }
        //车类有2个方法
        public virtual void reduceSpeed() => Console.WriteLine("减速慢行");

        public virtual void increaseSpeed() => Console.WriteLine("高速路段请加速");
    }

    //Bus类
    class Bus:Transport
    {
        //重写父类的方法
        public override void reduceSpeed() => Console.WriteLine("减速啦~~biubiu---");

        public override void increaseSpeed() => Console.WriteLine("加速啦~~~biubiu---");
    }
}

来，破而后立！

看报错提示，自己领悟~