list的c实现
#pragma once
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#include
#include
#include
typedef struct ListNode
{
int _data;
struct ListNode* _next;
}ListNode;
void InitList(ListNode** pHead)
{
*pHead = NULL;
}
void DestoryList(ListNode** pHead)
{
ListNode* tmp = *pHead;
while (tmp)
{
free(tmp);
tmp = tmp->_next;
}
*pHead = NULL;
}
ListNode* BuyNode(int data)
{
ListNode* newNode = (ListNode*)malloc(sizeof(ListNode));
assert(newNode);
newNode->_data = data;
newNode->_next = NULL;
return newNode;
}
void PushBack(ListNode** pHead, int data)
{
assert(pHead);
if (*pHead == NULL)
{
*pHead = BuyNode(data);
return;
}
ListNode* tmp = *pHead;
while (tmp)
{
tmp->_next;
}
tmp = BuyNode(data);
}
void PrintList(ListNode* pHead)
{
assert(pHead);
ListNode* tmp = pHead;
while (tmp)
{
printf("%d->", tmp->_data);
tmp = tmp->_next;
}
printf("%p\n", tmp);
}
void PushFront(ListNode** pHead, int data)
{
assert(pHead);
ListNode* tmp = *pHead;
*pHead = BuyNode(data);
(*pHead)->_next = tmp;
}
void PopBack(ListNode** pHead)
{
assert(pHead);
if (*pHead == NULL)
return;
ListNode* tmp = *pHead;
while (tmp->_next != NULL)
{
tmp = tmp->_next;
}
free(tmp);
tmp = NULL;
}
void PopFront(ListNode** pHead)
{
assert(pHead);
if (*pHead == NULL)
return;
ListNode* del = *pHead;
*pHead = (*pHead)->_next;
free(del);
}
ListNode* FindNode(ListNode** pHead, int data)
{
assert(pHead);
if (*pHead == NULL)
return NULL;
ListNode* tmp = *pHead;
while (tmp->_next != NULL)
{
if (tmp->_data == data)
return tmp;
tmp = tmp->_next;
}
return NULL;
}
void Insert(ListNode* pos, int data)
{
assert(pos);
ListNode*newnode = BuyNode(data);
newnode->_next = pos->_next;
pos->_next = newnode;
}
void Erase(ListNode** pHead, ListNode*pos)
{
assert(pHead);
assert(pos);
if (*pHead == NULL)
return;
ListNode* tmp = *pHead;
while (tmp->_next != NULL)
{
if (tmp->_next == pos)
{
tmp->_next = pos->_next;
free(pos);
break;
}
tmp = tmp->_next;
}
}
void DelNonTailNode(ListNode* pos)
{
assert(pos&&pos->_next);
ListNode* next = pos->_next->_next;
pos->_data = pos->_next->_data;
free(pos->_next);
pos->_next = next;
}
void remove(ListNode** pHead, int data)
{
assert(pHead);
if (*pHead == NULL)
return;
ListNode* del = FindNode(pHead,data);
if (del != NULL)
{
Erase(pHead, del);
}
return;
}
void Reverse(ListNode** pHead)
{
ListNode* cur = *pHead;
ListNode* head = NULL;
ListNode* tmp;
while (cur)
{
tmp = cur;
cur = cur->_next;
tmp->_next = head;
head = tmp;
}
*pHead = head;
}
void InsertFrontNode(ListNode* pos,int data)//假装加到pos前面其实就是data交换
{
assert(pos);
ListNode* newnode = BuyNode(pos->_data);
newnode->_next = pos->_next;
pos->_next = newnode;
pos->_data = data;
}
ListNode* FindMidNode(ListNode** pHead)
{
assert(pHead);
if (*pHead == NULL)
{
return NULL;
}
ListNode* slow = *pHead;
ListNode* fast = *pHead;
while (fast->_next&&fast)
{
slow = slow->_next;
fast = fast->_next->_next;
}
return slow;
}
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