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 addition to construction and destructor function, the members also function stack, stack up and stack elements for judging whether non-empty stack, The first document as "nohead_LinStack.h."