interface 接口

interface关键词

using System;

namespace Test {

    class Program {
        static void Main(string[] args) {
            // 只能调用鸟类的功能
            Bird a1 = new WildGoose();
            // 可以调用鸟的功能，也可以调用接口中的功能
            WildGoose a2 = (WildGoose)a1;
            // 只能调用飞行接口中的功能
            IFlight a3 = (IFlight)a2;
            a3.Flight();
            a3 = new Sparrow();
            a3.Flight();
        }
    }

    public enum Sex {
        Female,
        Male
    }

    class Bird {

    }

    class WildGoose : Bird, IFlight, ISwimming, IRun {
        public void Swimming() {
            Console.WriteLine("我是大雁的游泳接口");
        }

        public void Run() {
            Console.WriteLine("我是大雁的跑接口");
        }

        public void Flight() {
            Console.WriteLine("我是大雁的飞行接口");
        }
    }

    class Sparrow : Bird, IFlight {
        public void Flight() {
            Console.WriteLine("我是麻雀的飞行接口");
        }
    }

    class 企鹅 : Bird, ISwimming {
        public void Swimming() {
            Console.WriteLine("我是企鹅的游泳接口");
        }
    }

    interface IFlight {
        void Flight();
    }

    interface IRun {
        void Run();
    }

    interface ISwimming {
        void Swimming();
    }
}