15. 字符串匹配

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

namespace ConsoleApplication12
{
    class Program
    {
        static void Main(string[] args)
        {
            SubString subStr = new SubString();
            subStr.InitWithString("I am a Teacher.");
            bool result = subStr.ExistSubString("am");
            Console.WriteLine(result);
        }
    }

    class SubString
    {
        Hashtable ht = new Hashtable();

        public void InitWithString(string str)
        {
            string[] strArr = str.Split(‘ ‘, ‘,‘, ‘.‘);
            for (int i = 0; i < strArr.Length; i++)
            {
                ht[strArr[i]] = true;
            }
        }
        public bool ExistSubString(string query)
        {
            if (ht[query] !=null)
            {
                return true;
            }
            return false;
        }
    }
}