C++数据结构之实现循环顺序队列

#ifndef CirQueue_byNim
#define CirQueue_byNim

#include<iostream>
using namespace std;

const int QueueSize=100;  //循环队列的最大存储空间 
template <class T>
class CirQueue
{
  private:
    T *data;  //存储数据的数组 
    int front,rear; //队头队尾指针 
  public:
    CirQueue()
    {
      data=new T[QueueSize];
      front=rear=0;
    }
    ~CirQueue()
    {
      delete []data;
      front=rear=0;
    }
    void EnQueue(T e)
    {
      if((rear+1)%QueueSize==front)  //队满条件 
        throw "上溢";
      rear=(rear+1)%QueueSize;
      data[rear]=e;
    }
    T DeQueue()
    {
      if(rear==front)//队空条件 
        throw "下溢";
      front=(front+1)%QueueSize;
      return data[front];
    }
    T GetQueue()
    {
      if(rear==front)//队空条件 
        throw "下溢";
      return data[(front+1)%QueueSize];
    }
    bool empty()
    {
      if(front==rear) //队空条件：front==rear 
        return true;
      return false;
    }
};

#endif