void Traverse()//while( walker!=rear) { printf("%c",buff[walker]); walker=(walker+1)%10;

// StaticQuene.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
struct StaticQuene
{
private:
	char buff[10];
	int front;
	int rear;
public:
	bool isFull()
	{
		return ((rear+1)%10)==front;
	}
	bool isEmpty()
	{
		return front==rear;
	}
	StaticQuene()
	{
		//buff[0]=c;
		front=0;
		rear=0;
	}
	bool Enquene(char c)
	{
		if(isFull())
			return false;
		buff[rear]=c;
		rear=++rear%10;
		return true;

	}
	bool OutQuene(char& c)
	{
		if(isEmpty())
			return false;
		c=buff[front];
		front=++front%10;
		return true;
	}
	int getLength()
	{
		if (rear>=front)
			return (rear-front);
		//else if(rear==front)
		//	return isFull?10:0;
		else
			return (rear+10-front);
	}
	void Traverse()
	{
		int walker=front;
		while( walker!=rear)
		{
			printf("%c",buff[walker]);
			walker=(walker+1)%10;
		}
		printf("\n");
	}
};
int main(int argc, char* argv[])
{
	StaticQuene quene;
	int i=0;
	char c;
	while(!quene.isFull())
	{
	     quene.Enquene('a'+i++);
		 printf("%d ",quene.getLength());
	}
	printf("\n========================\nTraverse:\n");
	quene.Traverse();
	printf("=========================\n");
	while(!quene.isEmpty())
	{
	quene.OutQuene(c);
	printf("%c %d;",c,quene.getLength());
	}
	printf("=======================\n");
	 i=0;
	while(!quene.isFull())
	{
	     quene.Enquene('a'+i++);
		 printf("%d ",quene.getLength());
	}
	printf("\n");
	printf("\n========================\nTraverse:\n");
	quene.Traverse();
	printf("=========================\n");
	while(!quene.isEmpty())
	{
	quene.OutQuene(c);
	printf("%c %d;",c,quene.getLength());
	}
	printf("=======================\n");
	return 0;
}

/*
1 2 3 4 5 6 7 8 9
========================
Traverse:
abcdefghi
=========================
a 8;b 7;c 6;d 5;e 4;f 3;g 2;h 1;i 0;=======================
1 2 3 4 5 6 7 8 9

========================
Traverse:
abcdefghi
=========================
a 8;b 7;c 6;d 5;e 4;f 3;g 2;h 1;i 0;=======================
Press any key to continue
*/