순환 대기 열 - 순차 저장 구조 - 데이터 구조

#include
#include
#include

#define ERROR 0
#define OK 1
#define OVERFLOW -1
#define MAXSIZE 10


typedef int Elemtype;
typedef int Status;

typedef struct SqQue
{
	Elemtype *base;
	int front;
	int rear;
}SqQue;

Status InitQue(SqQue &q)  //initialize the queue
{
	q.base=(Elemtype*)malloc(MAXSIZE*sizeof(Elemtype));
	if(!q.base) exit(OVERFLOW);
	q.front=q.rear=0;
	return OK;
}

bool EmptyQue(SqQue q)   //if empty
{
	if(q.front==q.rear) return true;
	else return false;
}

Status EnQue(SqQue &q,Elemtype e)
{
	if((q.rear+1)%MAXSIZE==q.front) return ERROR;  //queue full
	q.base[q.rear]=e;
	q.rear=(q.rear+1)%MAXSIZE;
	return OK;
}

Status DisplayQue(SqQue q)
{
	int i;
	if(EmptyQue(q)) printf("The queue is empty!
");
	else
	{
		i=q.front;
		while(i!=q.rear)
		{
			printf("%d ",q.base[i]);
			i=(i+1)%MAXSIZE;
		}
		printf("
");
		return OK;
	} 
}

int QueLength(SqQue q)
{
	return (q.rear-q.front+MAXSIZE)%MAXSIZE;
}

Status DeQue(SqQue &q)
{
	Elemtype e;
	if(EmptyQue(q)) return ERROR;
	e=q.base[q.front];
	q.front=(q.front+1)%MAXSIZE;
	return OK;
}

Status GetQueHead(SqQue q,Elemtype &e)
{
	if(EmptyQue(q)) return ERROR;  //queue empty
	e=q.base[q.front];
	return OK;
}

int main()
{
	SqQue que;
	int n,i,len;
	Elemtype e;
	InitQue(que);
	if(EmptyQue(que)) printf("The initial queue is empty.
");
	printf("Input the number of queue n(don't greater than MAXSIZE):");
	scanf("%d",&n);
	for(i=0;i