顺序队列的c++实现

#ifndef QUEUE_H
#define QUEUE_H
template <class T>
class Queue
{
public:
     Queue(int  queuecapacity);
     bool Isempty();
     void Front();
     void Rear();
     void Push(T item);
     void Pop();
private:
    T *queue;
    int front;
    int rear;
    int capacity;
};

//利用构造函数初始化顺序队列
template <class T>
Queue<T>::Queue(int  queuecapacity)
{
  if( queuecapacity<1)
   {
       throw "the capacity of queue must be >0";
    }
  else
   {   
       queue=new T[queuecapacity];
       capacity=queuecapacity;
       front=rear=0;  //牺牲front这个位置，这个位置不放元素
    }

}

//元素进队列
template <class T>
void Queue<T>::Push(T item)
{
    if((rear+1)%capacity==front)
    {
    throw "the queue is full";
    }
    else
    {
          rear=(rear+1)%capacity;
          queue[rear]=item;
     }
}

//出列
template <class T>
void Queue<T>::Pop()
{   
    if(Isempty()) throw "the queue is empty";
    front=(front+1)%capacity;
}

//判断队列是否为空
template <class T>
inline bool Queue<T>::Isempty()
{
    return front==rear; 
}

//队首元素
template <class T>
inline void Queue<T>::Front()
{
    if(!Isempty())
    {
     cout<<"队首元素为"<< queue[(front+1)%capacity]<<endl;
    }
    else
    {
     cout<< "the queue is empty"<<endl;
    }
}

//队尾元素
template <class T>
inline void Queue<T>::Rear()
{
  if(!Isempty())
    {
    cout<<"队尾元素为"<< queue[rear]<<endl;
    }
    else
    {
     cout<< "the queue is empty"<<endl;
    }
}
#endif

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主函数

#include "queue.h"
#include<iostream>
using namespace std;
int main()
{
 Queue<int> q(10);
 q.Push(1);
 q.Push(2);
 q.Push(3);
 q.Front();
 q.Rear();

 q.Pop();
 q.Pop();
 q.Pop();
 q.Front();
 q.Rear();

 q.Push(4);
 q.Front();
 q.Rear();


 system("pause");
 return 0;
}