《数据结构》循环队列

循环队列的几个基本操作

#include 
using namespace std;
#define MAXSIZE 100
typedef struct
{
	int *base;
	int front;
	int rear;
}sqQueue;
bool Init(sqQueue &Q)
{
	Q.base = new int[MAXSIZE];
	if(!Q.base)
		exit;
	Q.front=Q.rear=0;
	return true;
}
int QueueLength(sqQueue Q)
{
	return (Q.rear-Q.front+MAXSIZE)%MAXSIZE;
}
bool EnQueue(sqQueue &Q,int e)
{
	if((Q.rear+1)%MAXSIZE == Q.front)
		return false;
	Q.base[Q.rear] = e;
	Q.rear = (Q.rear + 1)%MAXSIZE;
	return true;
}
bool DeQueue(sqQueue &Q,int &e)
{
	if(Q.rear == Q.front)
		return false;
	e=Q.base[Q.front];
	Q.front=(Q.front+1)%MAXSIZE;
	return true; 
} 
int GetHead(sqQueue Q)
{
	if(Q.rear != Q.front)
		return Q.base[Q.front];
}
int main ()
{
	int i,e;
	sqQueue Q;
	Init(Q);
	EnQueue(Q,5);
	EnQueue(Q,4);
	EnQueue(Q,3);
	DeQueue(Q,e);
	cout<