18._5索引器在类中的使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _18._5索引器在类中的使用
{
    class Program
    {
        public class indexText //访问类实例
        {
            private int[] array = new int[10];

            public int this[int index] 
            {
                get
                {
                    if (index < 0 || index >= 10) return 0;
                    else return array[index];
                }
                set
                {
                    if (index >= 0 && index < 10) array[index] = value;
                }
            }
        }

        public class weekIndex //访问类成员
        {
            string[] Week = { "星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日" };
            private int getDay(string weekText)
            {
                int i = 0;
                foreach(string day in Week)
                {
                    if (day == weekText) return i;
                    i++;
                }
                return -1;
            }

            public int this[string week]
            {
                get
                {
                    return getDay(week);
                }
            }
        }
        static void Main(string[] args)
        {
            Console.WriteLine("访问类实例的结果：");
            indexText Arr = new indexText();
            Arr[-5] = 5;
            Arr[0] = 15;
            Arr[1] = 23;
            Arr[2] = 50;
            Arr[11] = 60;

            Console.WriteLine("Arr[-5]={0}",Arr[-5]);
            Console.WriteLine("Arr[0]={0}", Arr[0]);
            Console.WriteLine("Arr[1]={0}", Arr[1]);
            Console.WriteLine("Arr[2]={0}", Arr[2]);
            Console.WriteLine("Arr[11]={0}", Arr[11]);

            weekIndex we = new weekIndex();
            Console.WriteLine(we["星期一"]);
            Console.WriteLine(we["星期三"]);
            Console.WriteLine(we["星期五"]);
            Console.WriteLine(we["星期八"]);
            Console.Read();
        }
    }
}