说明：  C语言编写的栈操作模板。包含栈的9种基本操作，从栈的创建、栈的判断到入栈、出栈操作，以及栈的删除等操作。
(C language template stack operation. Stack contains 9 kinds of basic operation, from the stack to create, to determine the stack入栈, a stack operation, and stack operations such as delete.)