順序隊列

<span style="font-size:24px;">#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#define OK 1
#define ERROR -1
#define MAXSIZE 10
#define OVERFLOW -2
typedef int statue;
typedef int QElemType;
typedef struct{
	QElemType *pBase;
	int front;
	int rear;
}SqQueue;
statue iniSQ(SqQueue *sq){//初始化
	sq->pBase=(QElemType *)malloc(sizeof(QElemType)*MAXSIZE);
	if(sq->pBase==NULL){
		printf("內存分配失敗\n");
		exit(OVERFLOW);
	}
	sq->front=sq->rear=0;
return OK;
}
bool isEmpty(SqQueue sq){
	if(sq.front==sq.rear)
		return true;
	return false;
}
bool isFail(SqQueue sq){
	if((sq.rear+1)%MAXSIZE==sq.front)
		return true;
	return false;
}
int getLength(SqQueue sq){
	return (sq.rear-sq.front+MAXSIZE)%MAXSIZE;
}
statue EnQueue(SqQueue *sq,QElemType val){//入隊
	if(isFail(*sq))
		return ERROR;
	sq->pBase[sq->rear]=val;
	sq->rear=(sq->rear+1)%MAXSIZE;
return OK;
}
statue DeQueue(SqQueue *sq,QElemType *val){//出隊
	if(isEmpty(*sq))
		return ERROR;
	*val=sq->pBase[sq->front];
	sq->front=(sq->front+1)%MAXSIZE;
return OK;
}
statue getHead(SqQueue sq,QElemType *val){
	if(isEmpty(sq))
		return ERROR;
	*val=sq->pBase[sq->front];
return OK;
}
int main(){
	SqQueue sq;
	iniSQ(&sq);
	EnQueue(&sq,2);
	EnQueue(&sq,3);
	int val;
	DeQueue(&sq,&val);
	printf("%d\n",val);
	printf("%d",getLength(sq));
return 0;
}</span>