class Program
    {
        static void Main(string[] args)
        {
            RoundClass round = new RoundClass(2);//實例化子類函數(shù)時端逼，先執(zhí)行父類構(gòu)造函數(shù)奈附，再執(zhí)行子類的構(gòu)造函數(shù)牲迫；
            round.show();



             SphereClass sphere = new SphereClass();
            sphere.d; //通過實例化也調(diào)用不了d，因為d是受保護的，只能給父類和子類使用；要調(diào)用d必須改權(quán)限 
            round.a// 點不出來，a在父類是私有的缤至；






            //練習

            SphereClass sph = new SphereClass();

            RoundClass rou = new RoundClass();

            rou.ShowDate();

            Console.ReadKey();

        }
    }

 class RoundClass : SphereClass//子類：父類
    {
        public RoundClass(int rr)
            : base("1")
        {//調(diào)用父類帶參構(gòu)造函數(shù)；// 子類構(gòu)造函數(shù)（形參） base(實參)
            Console.WriteLine("這是子類的構(gòu)造函數(shù)康谆！");
        }

        public void ShowDate()
        {
            Console.WriteLine("這是子類的普通方法凄杯！");
        }

        public void show()
        {

            Console.WriteLine("半徑是：{0}直徑是：{1}", r, d);//子類直接調(diào)用父類的屬性或 字段
            this.ShowSphere();
            this.ShowDate();
            base.ShowDate();

        }

        public RoundClass()
            : base()
        {

            Console.WriteLine("這是子類的不帶參函數(shù)！");
        }

        public RoundClass(int rr)
            : base(rr)
        {
            this.R = rr;
            Console.WriteLine("這是子類的帶參函數(shù)秉宿！");
        }

        public void Show()
        {

            Console.WriteLine("這是子類的普通方法");
        }

        public void ShowDate()
        {

            this.ShowSphere();
            this.Show();
            base.Show();
        }

    }

 class SphereClass
    {
        public int r;

        //private int a;
        protected int d;


        public int R
        {//屬性
            set { r = value; }
            get { return r; }
        }

        public SphereClass()
        {//構(gòu)造函數(shù)初始化戒突；
            r = 5;
            d = 2 * this.r;
            Console.WriteLine("這是不帶參父類的構(gòu)造函數(shù)！");
        }

        public SphereClass(int _r)
        {//構(gòu)造函數(shù)初始化描睦；父類帶參構(gòu)造函數(shù)
            // r = _r;

            Console.WriteLine("這是帶參父類的構(gòu)造函數(shù)膊存！");
        }


        public void ShowDate()
        {
            Console.WriteLine("這是父類的普通方法!");
        }

        public void ShowSphere()
        {

            Console.WriteLine("半徑是：{0}直徑是：{1}", this.R, d);
        }


        private int r;
        protected int d;

        public int R
        {
            set { r = value; }
            get { return r; }
        }

        public SphereClass()
        {
            r = 5;
            d = 2 * r;
            Console.WriteLine("這是父類不帶參構(gòu)造函數(shù)！");

        }

        public SphereClass(int _r)
        {
            r = _r;
            d = 2 * r;
            Console.WriteLine("這是父類帶參的函數(shù)！");


        }


        public void Show()
        {
            Console.WriteLine("這是父類的普通方法隔崎！");
        }

        public void ShowSphere()
        {
            Console.WriteLine("半徑{0} 直徑{1}", r, d);

        }
    }