函数附加练习3

        static void Main(string[] args)
        {
            Program function = new Program();
            function.workers();
            Console.ReadLine();
        }
        public void workers()
        {
            //输入职工号、职工姓名用二维数组装。
            string[,] worker = new string[10, 2];
            int[] num = new int[10];//记录职工号。
            for (int i = 0; i < 10; i++)
            {
                Console.Write("请输入职工号：");
                worker[i, 0] = Console.ReadLine();
                Console.Write("请输入职工姓名：");
                worker[i, 1] = Console.ReadLine();
                num[i] = int.Parse(worker[i, 0]);
            }
            Console.WriteLine();
            Console.WriteLine("排序前：");
            Console.WriteLine("职工号\t姓名");
            for (int i = 0; i < 10; i++)
            {
                for (int j = 0; j < 2; j++)
                    Console.Write(worker[i, j] + "\t");
                Console.WriteLine();
            }
            Console.WriteLine();
            //用哈希表装数组中职工号和职工姓名
            Hashtable work = new Hashtable();
            for (int i = 0; i < 10; i++)
            {
                work.Add(int.Parse(worker[i, 0]), worker[i, 1]);
            }
            //用ArrayList集合对哈希表键进行排序
            ArrayList w = new ArrayList(work.Keys);
            w.Sort();
            Console.WriteLine("排序后：");
            Console.WriteLine("职工号\t姓名");
            for (int i = 0; i < w.Count; i++)
            {
                Console.WriteLine("{0}\t{1}", w[i], work[w[i]].ToString());
            }
            //用冒泡法对职工号数组进行排序
            int t;
            for (int j = 0; j < 9; j++)
            {
                for (int i = 0; i < 9 - j; i++)
                {
                    if (num[i] > num[i + 1])
                    {
                        t = num[i];
                        num[i] = num[i + 1];
                        num[i + 1] = t;
                    }
                }
            }
            Console.WriteLine();
            //输入职工号输出职工姓名
            while (true)
            {
                Console.Write("请输入职工号：");
                int n = int.Parse(Console.ReadLine());
                int min = 0, max = 10, mid;
                //折半查找法
                while (min + 1 != max)
                {
                    mid = (max + min) / 2;
                    if (n > num[mid])
                    {
                        min = mid;
                    }
                    else if (n < num[mid])
                    {
                        max = mid;
                    }
                    else
                    {
                        Console.WriteLine("{0}号职工的姓名为{1}。", n, work[n].ToString());
                        break;
                    }
                }
                if (n == num[max])
                    Console.WriteLine("{0}号职工的姓名为{1}。", n, work[n].ToString());
                else if (n == num[min])
                    Console.WriteLine("{0}号职工的姓名为{1}。", n, work[n].ToString());
                else if (n != num[0] && n != num[1] && n != num[2] && n != num[3] && n != num[4] && n != num[5] && n != num[6] && n != num[7] && n != num[8] && n != num[9])
                    Console.WriteLine("{0}号职工不存在。", n);
            }
        }