栈的创建myPathStack

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于 2015-04-16 17:41:33 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/u014710924/article/details/45078443

本文详细介绍了如何使用C++实现栈的基本操作，包括初始化、入栈、出栈和释放内存。

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myPathStack::myPathStack()
{
head = (PPATHNODE)malloc(sizeof(PATHNODE));
memset(head,0,sizeof(PATHNODE));
head->next = NULL;
}

myPathStack::~myPathStack()
{
free(head);
head = NULL;
}
PPATHNODE myPathStack::Push(HTREEITEM item)
{
if(item == head->hItem)
return NULL;

PPATHNODE temp = NULL;
temp = (PPATHNODE)malloc(sizeof(PATHNODE));
if(temp == NULL)
return NULL;
temp->hItem = item;
temp->next = head->next;
head->next = temp;
head->hItem = temp->hItem;//指向栈顶
return temp;
}
PPATHNODE myPathStack::Pop()
{
if(head->next == NULL)
return NULL;
PPATHNODE temp;
temp = head->next;
head->next = temp->next;
head->hItem = temp->hItem;
free(temp);
return head; //返回栈顶
}