using System;

using System.Collections.Generic;

using System.Text;

namespace Example08

{

    public class Point

    {

        private double x, y;

        public Point(double X, double Y)

        {

            x = X;

            y = Y;

        }

        //重写ToString方法方便输出

        public override string ToString()

        {

            return String.Format("X: {0} , Y: {1}", x, y);

        }

    }

    public class Points

    {

        Point[] points;

        public Points(Point[] Points)

        {

            points = Points;

        }

        public int PointNumber

        {

            get 

            { 

                return points.Length; 

            }

        }    

        //实现索引访问器

        public Point this[int Index]

        {

            get

            {

                return points[Index];

            }

        }

    }

    //感谢watson hua(http://huazhihao.cnblogs.com/)的指点

    //索引指示器的实质是含参属性，参数并不只限于int

    class WeatherOfWeek

    {

        public string this[int Index]

        {

            get

            {

                //注意case段使用return直接返回所以不需要break

                switch (Index)

                {

                    case 0:

                        {

                            return "Today is cloudy!";

                        }

                    case 5:

                        {

                            return "Today is thundershower!";

                        }

                    default:

                        {

                            return "Today is fine!";

                        }

                }

            }

        }

        public string this[string Day]

        {

            get

            {

                string TodayWeather = null;

                //switch的标准写法

                switch (Day)

                {

                    case "Sunday":

                        {

                            TodayWeather = "Today is cloudy!";

                            break;

                        }

                    case "Friday":

                        {

                            TodayWeather = "Today is thundershower!";

                            break;

                        }

                    default:

                        {

                            TodayWeather = "Today is fine!";

                            break;

                        }

                }

                return TodayWeather;

            }

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            Point[] tmpPoints = new Point[10];

            for (int i = 0; i < tmpPoints.Length; i++)

            {

                tmpPoints[i] = new Point(i, Math.Sin(i));

            }

            Points tmpObj = new Points(tmpPoints);

            for (int i = 0; i < tmpObj.PointNumber; i++)

            {

                Console.WriteLine(tmpObj[i]);

            }

            string[] Week = new string[] { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Staurday"};

            WeatherOfWeek tmpWeatherOfWeek = new WeatherOfWeek();

            for (int i = 0; i < 6; i++)

            {

                Console.WriteLine(tmpWeatherOfWeek[i]);

            }

            foreach (string tmpDay in Week)

            {

                Console.WriteLine(tmpWeatherOfWeek[tmpDay]);

            }

            Console.ReadLine();

        }

    }

}