C++学习笔记1----实现循环队列

关于循环队列，这篇博客介绍的很形象清楚： 点击打开链接，这里给出我自己实现的代码

//
// @file    queue.cc
//@author  BigDayDreamer([email protected])
//
 
#include 
using std::cout;
using std::endl;

class Queue
{
public:
	Queue(int maxSize);

	bool empty();

	bool full();

	void Enqueue(int num);

	void Dequeue();

	int getFront();

	int getRear();

	~Queue();

private:
	int _maxSize;
	int *_base;
	int *_front;
	int *_rear;
};

Queue::Queue(int maxSize)
: _maxSize(maxSize)
, _base(new int[_maxSize]())
, _front(_base)
, _rear(_base)
{}

bool Queue::empty()
{
	if(_front==_rear)
		return 1;
	else
		return 0;
}

bool Queue::full()
{
	if(_front==(_base+(_rear-_base+1)%_maxSize))
		return 1;
	else
		return 0;
}

void Queue::Enqueue(int num)
{
	*_rear=num;
	_rear=_base+(_rear-_base+1)%_maxSize;
}

void Queue::Dequeue()
{
	_front=_base+(_front-_base+1)%_maxSize;
}

int Queue::getFront()
{
	return *_front;
}

int Queue::getRear()
{
	return *(_rear-1);
}

Queue::~Queue()
{
	delete [] _base;
}

int main(void)
{
	Queue Q(10);

	cout << "Is Queue empty?   " << Q.empty() << endl;

	cout << "Is Queue full?  " << Q.full() << endl;

	for(int i=1;i<=100;i++)
	{
		if(!Q.full())
		{
			Q.Enqueue(i);
		}else 
		{
			cout << "Queue is full" << endl;
			break;
		}
	}

	while(!Q.empty())
	{
		cout << Q.getFront() << " " ;
		Q.Dequeue();
	}
	cout << endl;

	cout << "Is Queue empty?   " << Q.empty() << endl;

	return 0;
}