static void PrintStackLink(StackLink <int> s, string text = "输出:")
        {
            int element = 0;
            int length  = s.GetLength();

            Console.Write(text);
            for (int i = 0; i < length; i++)
            {
                s.Pop(ref element);
                Console.Write(element.ToString() + " ");
            }
            Console.WriteLine();
        }
        static void TestStackLink()
        {
            //入栈
            StackLink <int> s = new StackLink <int>();

            PrintStackLink(s, "入栈前:");
            s.Push(2);
            s.Push(9);
            s.Push(10);
            PrintStackLink(s, "依次出栈输出:");
            Console.WriteLine();

            //清空栈测试
            s.Push(100);
            s.Push(200);
            s.ClearStack();
            PrintStackLink(s, "清空栈后:");
        }