C的数据结构---头尾指针队列

.h

#pragma once
#include 
#include 
#include 
#include 
#include  

typedef int QElemType;

typedef struct QueueNode
{
	struct QueueNode* next;
	QElemType data;
}QueueNode;

typedef struct Queue
{
	QueueNode* head;
	QueueNode* tail;
}Queue;


void QueueInit(Queue* pq);
void QueueDestroy(Queue *pq);
void QueuePush(Queue* pq, QElemType x);
void QueuePop(Queue* pq);
QElemType Get_QueueFront(Queue* pq); //取队头元素  
QElemType Get_QueueBack(Queue* pq);  //取队尾元素
int QueueSize(Queue* pq);
bool QueueEmpty(Queue* pq);
QueueNode* Buynode();

.cpp

void QueueInit(Queue* pq)
{
	assert(pq != NULL);
	pq->head = pq->tail = NULL;
}

void QueueDestroy(Queue *pq)
{
	assert(pq != NULL);
	QueueNode *cur = pq->head;
	while (cur !&#