#ifndef __QUEUE__
#define __QUEUE__

class CQueue
{
      int * m_pData;
      int m_nHead,m_nTail;
      int m_nCount;
   public:
      CQueue(int nCount=10);

      bool isEmpty();
      bool isFull();

      void push(const int & v);
      bool pop(int &v);
};

CQueue::CQueue(int nCount)
{
    m_pData = new int[nCount];
    m_nHead = m_nTail = 0;
    m_nCount = nCount;
}

void CQueue::push(const int & value)
{
    if(!isFull())
    {
        m_pData[m_nTail++] = value;
        
        if(m_nTail >= m_nCount)
          m_nTail = 0;
    }
}
bool CQueue::pop (int & value)
{
    if(isEmpty())return false;
    ch = m_pData[m_nHead++];

    if(m_nHead >= m_nCount)
       m_nHead = 0;

    return true;
}

bool CQueue::isFull()
{
     return ((m_nTail+1)%m_nCount == m_nHead);
}
bool CQueue::isEmpty()
{
     return m_nHead == m_nTail;
}

#endif

調用方法如下：

#include <iostream>
#include "queue.h"
using namespace std;

int main(int argc, char* argv[])
{
     CQueue queue = 5;

     queue.push(2);
     queue.push(3);
     queue.push(4);
     queue.push(5);
     queue.push(6);
     queue.push(7);
     queue.push(8);

     int c = 0;
     queue.pop(c);
     cout << c <<endl;
     queue.pop(c);
     cout << c <<endl;
     queue.pop(c);
     cout << c <<endl;

     queue.push(9);
     bool re = queue.pop(c);
     cout << re <<":"<< c <<endl;
     re = queue.pop(c);
     cout << re << ":"<< c <<endl;
     re = queue.pop(c);
     cout << re <<":" << c <<endl;

     getchar();
}

模板化處理後，如下：

#ifndef __QUEUE__
#define __QUEUE__

template<class T>
class CQueue
{
      T * m_pData;
      int m_nHead,m_nTail;
      int m_nCount;
   public:
      CQueue(int nCount=10);

      bool isEmpty();
      bool isFull();

      void push(const T & v);
      bool pop(T &v);
};

template<class T>
CQueue<T>::CQueue(int nCount)
{
    m_pData = new T[nCount];
    m_nHead = m_nTail = 0;
    m_nCount = nCount;
}

template<class T>
void CQueue<T>::push(const T & value)
{
    if(!isFull())
    {
        m_pData[m_nTail++] = value;
        
        if(m_nTail >= m_nCount)
          m_nTail = 0;
    }
}

template<class T>
bool CQueue<T>::pop (T & ch)
{
    if(isEmpty())return false;
    ch = m_pData[m_nHead++];

    if(m_nHead >= m_nCount)
       m_nHead = 0;

    return true;
}

template<class T>
bool CQueue<T>::isFull()
{
     return ((m_nTail+1)%m_nCount == m_nHead);
}

template<class T>
bool CQueue<T>::isEmpty()
{
     return m_nHead == m_nTail;
}

#endif

C++實現隊列