diff --git a/_02.栈与队列/05顺序队列_Queue.c b/_02.栈与队列/05顺序队列_Queue.c
new file mode 100644
index 0000000..1639e84
--- /dev/null
+++ b/_02.栈与队列/05顺序队列_Queue.c
@@ -0,0 +1,156 @@
+#include "stdio.h"    
+#include "stdlib.h"   
+#include "io.h"  
+#include "math.h"  
+#include "time.h"
+
+#define OK 1
+#define ERROR 0
+#define TRUE 1
+#define FALSE 0
+#define MAXSIZE 20 /* �洢�ռ��ʼ������ */
+
+typedef int Status; 
+typedef int QElemType; /* QElemType���͸���ʵ������������������Ϊint */
+
+/* ѭ�����е�˳��洢�ṹ */
+typedef struct
+{
+	QElemType data[MAXSIZE];
+	int front;    	/* ͷָ�� */
+	int rear;		/* βָ�룬�����в��գ�ָ�����βԪ�ص���һ��λ�� */
+}SqQueue;
+
+Status visit(QElemType c)
+{
+	printf("%d ",c);
+	return OK;
+}
+
+/* ��ʼ��һ���ն���Q */
+Status InitQueue(SqQueue *Q)
+{
+	Q->front=0;
+	Q->rear=0;
+	return  OK;
+}
+
+/* ��Q��Ϊ�ն��� */
+Status ClearQueue(SqQueue *Q)
+{
+	Q->front=Q->rear=0;
+	return OK;
+}
+
+/* ������QΪ�ն���,�򷵻�TRUE,���򷵻�FALSE */
+Status QueueEmpty(SqQueue Q)
+{ 
+	if(Q.front==Q.rear) /* ���пյı�־ */
+		return TRUE;
+	else
+		return FALSE;
+}
+
+/* ����Q��Ԫ�ظ�����Ҳ���Ƕ��еĵ�ǰ���� */
+int QueueLength(SqQueue Q)
+{
+	return  (Q.rear-Q.front+MAXSIZE)%MAXSIZE;
+}
+
+/* �����в���,����e����Q�Ķ�ͷԪ��,������OK,���򷵻�ERROR */
+Status GetHead(SqQueue Q,QElemType *e)
+{
+	if(Q.front==Q.rear) /* ���п� */
+		return ERROR;
+	*e=Q.data[Q.front];
+	return OK;
+}
+
+/* ������δ���������Ԫ��eΪQ�µĶ�βԪ�� */
+Status EnQueue(SqQueue *Q,QElemType e)
+{
+	if ((Q->rear+1)%MAXSIZE == Q->front)	/* ���������ж� */
+		return ERROR;
+	Q->data[Q->rear]=e;			/* ��Ԫ��e��ֵ����β */
+	Q->rear=(Q->rear+1)%MAXSIZE;/* rearָ�������һλ�ã� */
+								/* ���������ת������ͷ�� */
+	return  OK;
+}
+
+/* �����в��գ���ɾ��Q�ж�ͷԪ�أ���e������ֵ */
+Status DeQueue(SqQueue *Q,QElemType *e)
+{
+	if (Q->front == Q->rear)			/* ���пյ��ж� */
+		return ERROR;
+	*e=Q->data[Q->front];				/* ����ͷԪ�ظ�ֵ��e */
+	Q->front=(Q->front+1)%MAXSIZE;	/* frontָ�������һλ�ã� */
+									/* ���������ת������ͷ�� */
+	return  OK;
+}
+
+/* �Ӷ�ͷ����β���ζԶ���Q��ÿ��Ԫ����� */
+Status QueueTraverse(SqQueue Q)
+{ 
+	int i;
+	i=Q.front;
+	while((i+Q.front)!=Q.rear)
+	{
+		visit(Q.data[i]);
+		i=(i+1)%MAXSIZE;
+	}
+	printf("\n");
+	return OK;
+}
+
+int main()
+{
+	Status j;
+	int i=0,l;
+	QElemType d;
+	SqQueue Q;
+	InitQueue(&Q);
+	printf("��ʼ�����к󣬶��пշ�%u(1:�� 0:��)\n",QueueEmpty(Q));
+
+	printf("���������Ͷ���Ԫ��(������%d��),-1Ϊ��ǰ������: ",MAXSIZE-1);
+	do
+	{
+		/* scanf("%d",&d); */
+		d=i+100;
+		if(d==-1)
+			break;
+		i++;
+		EnQueue(&Q,d);
+	}while(i<MAXSIZE-1);
+
+	printf("���г���Ϊ: %d\n",QueueLength(Q));
+	printf("���ڶ��пշ�%u(1:�� 0:��)\n",QueueEmpty(Q));
+	printf("����%d���ɶ�ͷɾ��Ԫ��,��β����Ԫ��:\n",MAXSIZE);
+	for(l=1;l<=MAXSIZE;l++)
+	{
+		DeQueue(&Q,&d);
+		printf("ɾ����Ԫ����%d,�����Ԫ��:%d \n",d,l+1000);
+		/* scanf("%d",&d); */
+		d=l+1000;
+		EnQueue(&Q,d);
+	}
+	l=QueueLength(Q);
+
+	printf("���ڶ����е�Ԫ��Ϊ: \n");
+	QueueTraverse(Q);
+	printf("�����β������%d��Ԫ��\n",i+MAXSIZE);
+	if(l-2>0)
+		printf("�����ɶ�ͷɾ��%d��Ԫ��:\n",l-2);
+	while(QueueLength(Q)>2)
+	{
+		DeQueue(&Q,&d);
+		printf("ɾ����Ԫ��ֵΪ%d\n",d);
+	}
+
+	j=GetHead(Q,&d);
+	if(j)
+		printf("���ڶ�ͷԪ��Ϊ: %d\n",d);
+	ClearQueue(&Q);
+	printf("��ն��к�, ���пշ�%u(1:�� 0:��)\n",QueueEmpty(Q));
+	return 0;
+}
+
diff --git a/_02.栈与队列/_e.顺序队列.c b/_02.栈与队列/_e.顺序队列.c
new file mode 100644
index 0000000..f093e2a
--- /dev/null
+++ b/_02.栈与队列/_e.顺序队列.c
@@ -0,0 +1,141 @@
+/*
+ * @Author: Xu Bai
+ * @Date: 2019-07-02 22:06:31
+ * @LastEditors: Xu Bai
+ * @LastEditTime: 2019-07-02 22:32:59
+ */
+#include "stdlib.h"
+#include "io.h"
+#include "stdio.h"
+
+#define MAXSIZE 20
+#define OK 1
+#define ERROR 0
+#define TRUE 1
+#define FALSE 0
+
+typedef int Status;
+typedef int ElemType;
+
+typedef struct
+{
+    ElemType data[MAXSIZE];
+    int front;
+    int rear;
+} SqQueue;
+
+Status visit(ElemType e)
+{
+    printf("%d ", e);
+    return OK;
+}
+
+Status InitQueue(SqQueue *Q)
+{
+    Q->front = 0;
+    Q->rear = 0;
+    return OK;
+}
+
+Status CleatQueue(SqQueue *Q)
+{
+    Q->front = Q->rear = 0;
+    return OK;
+}
+
+Status QuequEmpty(SqQueue Q)
+{
+    if (Q.front == Q.rear)
+    {
+        return TRUE;
+    }
+    else
+    {
+        return FALSE;
+    }
+}
+
+int QueueLength(SqQueue Q)
+{
+    return (Q.rear - Q.front + MAXSIZE) % MAXSIZE;
+}
+
+Status GetHead(SqQueue Q, ElemType *e)
+{
+    if (Q.front = Q.rear)
+    {
+        return ERROR;
+    }
+    else
+    {
+        *e = Q.data[Q.front];
+        return OK;
+    }
+}
+
+Status EnQueue(SqQueue *Q, ElemType e)
+{
+    if ((Q->rear + 1) % MAXSIZE == Q->front)
+    {
+        // ������
+        return ERROR;
+    }
+    else
+    {
+        Q->data[Q->rear] = e;
+        Q->rear = (Q->rear + 1) % MAXSIZE;
+        return OK;
+    }
+}
+
+Status DeQueue(SqQueue *Q, ElemType *e)
+{
+    if (Q->front == Q->rear)
+    {
+        return ERROR;
+    }
+    *e = Q->data[Q->front];
+    Q->front = (Q->front + 1) % MAXSIZE;
+    return OK;
+}
+
+Status QueueTraverse(SqQueue Q)
+{
+    int i = Q.front;
+    while ((i + Q.front) != Q.rear)
+    {
+        visit(Q.data[i]);
+        i = (i + 1) % MAXSIZE;
+    }
+    printf("\n");
+    return OK;
+}
+
+int main(){
+    ElemType e;
+    SqQueue q;
+    InitQueue(&q);
+    int i ;
+    printf("EnQueue!\n");
+    for ( i = 0; i < MAXSIZE; i++)
+    {
+        EnQueue(&q,i);
+    }
+    
+    QueueTraverse(q);
+    printf("DeQueue!\n");
+    for ( i = 10; i < MAXSIZE; i++)
+    {
+        DeQueue(&q,&e);
+    }
+    QueueTraverse(q);
+    CleatQueue(&q);
+    if (QuequEmpty(q))
+    {
+        printf("empty!\n");
+    }
+    getchar();
+    return OK;
+    
+    
+}
diff --git a/a.out b/a.out
index 7846ee7..21391a1 100644
Binary files a/a.out and b/a.out differ