static void PrintStackList(StackList <int> s, string text = "输出：")
{
int data = 0;
int length = s.GetLength();
Console.Write(text);
for (int i = 0; i < length; i++)
{
s.Pop(ref data);
Console.Write(data.ToString() + " ");
}
Console.WriteLine();
}
static void TestStackList()
{
//进栈测试
StackList <int> s = new StackList <int>();
PrintStackList(s, "进栈前：");
s.Push(5);
s.Push(20);
s.Push(33);
PrintStackList(s, "依次进栈5，20，33后依次出栈：");
Console.WriteLine(s.isEmpty());
Console.WriteLine();
//清空栈
s.Push(99);
s.Push(88);
s.Push(22);
s.ClearStack();
PrintStackList(s, "清空栈后：");
}
public Calculator()
{
_elements = new MyList <string>(100);
_midStack = new StackList <string>(100);
_laterString = new MyList <string>(100);
}