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Devil0F 2019-03-08 19:20:35 +08:00 committed by GitHub
parent 2c6b918020
commit 17c13f568d
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1 changed files with 12 additions and 12 deletions
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20
c-cpp/06_linkedlist/Dlist/Dlist.c
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@ -11,7 +11,7 @@
void dlist_init(stDlistHead *dlist)
void dlist_init(stDlistHead *dlist) //链表初始化
{
dlist->size = 0;
dlist->head = NULL;
@ -36,11 +36,11 @@ void dlist_destory(stDlistHead *dlist)
return;
}
int dlist_insert_head(stDlistHead *dlist,stDlistNode *pNode,int data)
int dlist_insert_head(stDlistHead *dlist,stDlistNode *pNode,int data) //插入头结点，操作的链表，操作的节点，数据
{
if(pNode == NULL)
if(pNode == NULL) //当只传递一个数据时
{
pNode = (stDlistNode *)malloc(sizeof(stDlistNode));
pNode = (stDlistNode *)malloc(sizeof(stDlistNode)); //新建节点，为节点分配空间
if (pNode == NULL)
{
return -1;
@ -51,23 +51,23 @@ int dlist_insert_head(stDlistHead *dlist,stDlistNode *pNode,int data)
pNode->prev = NULL;
pNode->next = NULL;
if (dlist->size == 0)
if (dlist->size == 0) //如果链表长度为0，即链表当前无节点，
{
dlist->head = pNode;
dlist->tail = pNode;
}
else
else //如果链表已有节点，则令新插入节点为头节点
{
pNode->next = dlist->head;
dlist->head->prev = pNode;
dlist->head = pNode;
}
dlist->size++;
dlist->size++; //每成功调用一次，链表长度+1
return 0;
}
stDlistNode * dlist_remove_tail(stDlistHead *dlist)
stDlistNode * dlist_remove_tail(stDlistHead *dlist) //删除尾部节点
{
stDlistNode *pNode = NULL;
@ -139,14 +139,14 @@ stDlistNode * dlist_search(stDlistHead * dlist,int data)
return NULL;
}
void dlist_dump(stDlistHead *dlist)
void dlist_dump(stDlistHead *dlist) //显示链表中的数据
{
int no = 0;
stDlistNode *pNode = dlist->head;
while(pNode != NULL)
{
printf("\r\n [%d] = %d",no++,pNode->data);
pNode = pNode->next;
pNode = pNode->next; //将pNode的下一个节点赋值给pNode，推进循环
}
return;