순환 대기 열의 순서 표시 와 실현

#include<stdio.h>
#include<stdlib.h>
#define MAXQSIZE 100
typedef struct//          
{	int *base;//      
	int front;
	int rear;
}CircleQueue;
void InitQueue(CircleQueue &Q);//         
void QueueLength(CircleQueue Q);//      
void EnQueue(CircleQueue &Q);//    
void DeQueue(CircleQueue &Q);//    
void ExportQueue(CircleQueue &Q);//      
void main()
{	int x;
	CircleQueue Qa;
	printf("1.Insert an element to the CircleQueue.
");
	printf("2.Delete an element of the CircleQueue.
");
	printf("3.Export the length of the CircleQueue.
");
	printf("4.Export the element of the CircleQueue.
");
	printf("0.End up the operation.
");
	InitQueue(Qa);
	while(1)
	{	printf("Please input your choice:");
		scanf("%d",&x);
		switch(x)
		{	case 1:	EnQueue(Qa);
					break;
			case 2:	DeQueue(Qa);
					break;
			case 3:	QueueLength(Qa);
					break;
			case 4: ExportQueue(Qa);
					break;
		}
		if(x==0)
		{	printf("The operation in the end!
");
			break;
		}
	}
}
void InitQueue(CircleQueue &Q)
{	Q.base=(int *)malloc(MAXQSIZE*sizeof(int));
	if(!Q.base)
	{	printf("Fail to create CircleQueue!
");
		return;
	}
	Q.front=Q.rear=0;
	printf("Succeed to create CircleQueue!
");
}
void QueueLength(CircleQueue Q)
{	printf("The length of the CircleQueue is %d
",(Q.rear-Q.front+MAXQSIZE)%MAXQSIZE);
}
void EnQueue(CircleQueue &Q)
{	int n;
	if((Q.rear+1)%MAXQSIZE==Q.front)
	{	printf("The CircleQueue is full!
");
		return;
	}
	printf("Please input the number to insert:");
	scanf("%d",&n);
	Q.base[Q.rear]=n;
	Q.rear=(Q.rear+1)%MAXQSIZE;// Q.rear           ，       
	printf("Succeed to insert %d
",n);
}
void DeQueue(CircleQueue &Q)
{	if(Q.rear==Q.front)
	{	printf("The CircleQueue is empty!
");
		return;
	}
	printf("Succeed to delete %d
",Q.base[Q.front]);
	Q.front=(Q.front+1)%MAXQSIZE;
}
void ExportQueue(CircleQueue &Q)
{	CircleQueue p;
	p=Q;
	printf("The CircleQueue is:");
	while(p.front!=p.rear)
	{	printf("%d",p.base[p.front]);
		p.front=(p.front+1)%MAXQSIZE;
	}
	printf("
");
}