int[] shuzu = new int[111];
        string xinm = "";//缘由https://ask.csdn.net/questions/1056757
        Console.Write("输入人员数量：");
        int lian = int.Parse(Console.ReadLine()), j = 0;
        while (lian > j)
        {
            Console.Write("输入姓名：");
            xinm = Console.ReadLine();
            Console.Write("输入 " + xinm + " 年龄：");
            shuzu[j++] = int.Parse(Console.ReadLine());
        }
         Console.Write("年龄：");
         while (0 < j) Console.Write(shuzu[--j].ToString() + " ");
         Console.WriteLine();
        Console.WriteLine("平均年龄："+(shuzu.Sum() / lian).ToString());