栈：头添加头删除

#include<stdio.h>
#include<stdlib.h>
typedef struct node1
{
	int nValue;
	struct node1 *pNext;
}MyStack;

typedef struct node2
{
	int nCount;
	MyStack *pTop;
}Stack;
void s_Init(Stack **pStack)
{
	*pStack = (Stack*)malloc(sizeof(Stack));
	(*pStack)->nCount = 0;
	(*pStack)->pTop = NULL;
}
void s_Push(Stack *pStack,int nNum)
{
	if(pStack == NULL)return;

	MyStack *pTemp = NULL;
	pTemp = (MyStack*)malloc(sizeof(MyStack));
	pTemp->nValue = nNum;

	pTemp->pNext = pStack->pTop;
	pStack->pTop = pTemp;
	pStack->nCount++;
}
int s_Pop(Stack *pStack)
{
	if(pStack == NULL || pStack->nCount == 0)return -1;

	MyStack *pDel = NULL;
	int nNum;

	pDel = pStack->pTop;
	nNum = pDel->nValue;

	pStack->pTop = pStack->pTop->pNext;

	free(pDel);
	pDel = NULL;

	pStack->nCount--;
	return nNum;
}
void s_Clear(Stack *pStack)
{
	if(pStack == NULL || pStack->nCount == 0)return;

	while(pStack->nCount != 0)
	{
		s_Pop(pStack);
	}
}
void s_Destroy(Stack **pStack)
{
	s_Clear(*pStack);

	free(*pStack);
	*pStack = NULL;
}
MyStack *s_GetTop(Stack *pStack)
{
	if(pStack == NULL)exit(1);

	return pStack->pTop;
}
int s_GetCount(Stack *pStack)
{
	if(pStack == NULL)return -1;
	return pStack->nCount;
}
int s_IsEmpty(Stack *pStack)
{
	if(pStack == NULL)exit(1);

	return pStack->nCount == 0 ? 1 :0;
}

int main()
{
	Stack *pStack = NULL;
	s_Init(&pStack);
	s_Push(pStack,1);
	s_Push(pStack,2);
	s_Push(pStack,3);
	s_Push(pStack,4);
	printf("%d\n",s_Pop(pStack));
	printf("%d\n",s_Pop(pStack));
	printf("%d\n",s_Pop(pStack));
	printf("%d\n",s_Pop(pStack));
	printf("%d\n",s_Pop(pStack));
	s_Destroy(&pStack);
	s_Push(pStack,1000);
	printf("%d\n",s_Pop(pStack));
	return 0;
}

队列：尾添加头删除

#include<stdio.h>
#include<stdlib.h>

typedef struct node3
{
	int nValue;
	struct node3 *pNext;
}MyQueue;

typedef struct node4
{
	int nCount;
	MyQueue *pHead;
	MyQueue *pTail;
}Queue;

void q_Init(Queue **pQueue)
{
	*pQueue = (Queue*)malloc(sizeof(Queue));
	(*pQueue)->nCount = 0;
	(*pQueue)->pHead = NULL;
	(*pQueue)->pTail = NULL;
}

void q_Push(Queue *pQueue,int nNum)
{
	if(pQueue == NULL)return;

	MyQueue *pTemp = NULL;
	pTemp = (MyQueue*)malloc(sizeof(MyQueue));
	pTemp->nValue = nNum;
	pTemp->pNext = NULL;


	//尾添加
	if(pQueue->pHead == NULL)
	{
		pQueue->pHead = pTemp;
	}
	else
	{
		pQueue->pTail->pNext = pTemp;
	}
	pQueue->pTail = pTemp;

	pQueue->nCount++;
}

int q_Pop(Queue *pQueue)
{
	if(pQueue == NULL || pQueue->nCount == 0)return -1;

	MyQueue *pDel = NULL;
	pDel = pQueue->pHead;
	int nNum;
	nNum = pDel->nValue;

	pQueue->pHead = pQueue->pHead->pNext;

	free(pDel);
	pDel = NULL;
	pQueue->nCount--;

	if(pQueue->nCount == 0)
	{
		pQueue->pTail = NULL;
	}

	return nNum;
}

int q_IsEmpty(Queue *pQueue)
{
	if(pQueue == NULL)exit(1);

	return pQueue->nCount == 0?1:0;
}

int main()
{
	Queue *pQueue = NULL;
	q_Init(&pQueue);

	q_Push(pQueue,1);
	q_Push(pQueue,2);
	q_Push(pQueue,3);
	q_Push(pQueue,4);

	printf("%d\n",q_Pop(pQueue));
	printf("%d\n",q_Pop(pQueue));
	printf("%d\n",q_Pop(pQueue));
	printf("%d\n",q_Pop(pQueue));
	return 0;
}