不带头结点的链式堆栈类,1、 定义并实现不带头结点的链式堆栈类，除构造和析构函数外，成员函数还有入栈、出栈、取栈顶元素、判断堆栈是否非空，头文件为“nohead_LinStack.h”。-node does not take the lead in the category of chain stack, 1, and the definition does not take the lead in realizing the chain nodes stack category, In add