[C++知识库]C/C++圆形队列

队列特点：

• 先进先出
• 只能从队列头部删除元素
• 只能从队列尾部插入元素

使用：

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

int main(int argc, char *argv[])
{
    CCircleQueue<int> queue(4);//定义一个容量为4的队列

    int i=1;
    bool ret;
    ret=queue.push_back(i);
    if(!ret)
    {
        cout << "push_back failed" << endl;
    }
    else
    {
        cout << "queue.size() = " << queue.size() << ", queue.space() = " << queue.space() << endl;
    }

    ret=queue.pop_front(0);
    if(!ret)
    {
        cout << "pop_front failed" << endl;
    }
    else
    {
        cout << "queue.size() = " << queue.size() << ", queue.space() = " << queue.space() << endl;
    }

    i=2;
    ret=queue.push_back(i);
    if(!ret)
    {
      

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