#include<iostream>using namespace std;struct Queue{    int maxCnt;    int* elements;    int front,rear;};Queue* createQueue(int max=7){     Queue* queue = (Queue*)malloc(sizeof(Queue));     queue->front=0;     queue->rear=0;     queue->maxCnt=max+1;//预留一个空间来预防假溢出的情况     queue->elements = new int[ queue->maxCnt];     return  queue;}bool isFull(Queue* queue){    return ((queue->rear+1)%queue->maxCnt)==queue->front;}bool isEmpty(Queue* queue){    return queue->rear==queue->front;} bool InQueue(Queue* queue,int value){    if(isFull(queue))        return 0;    queue->elements[queue->rear++]=value;    queue->rear%=queue->maxCnt;    return 1;}bool DeQueue(Queue* queue,int* ans){    if(isEmpty(queue))      return 0;    *ans = queue->elements[queue->front++];    queue->front%=queue->maxCnt;    return 1;}bool front(Queue* queue,int* ans){    if(isEmpty(queue))      return 0;    *ans = queue->elements[queue->front];    return 1;}void clearQueue(Queue* queue){    int x;    while(!isEmpty(queue))    {        DeQueue(queue,&x);        cout<<x<<" ";    }    cout<<endl;}void outPut(Queue* queue){    int st = queue->front;    int ed = queue->rear;    while(st!=ed)    {        cout<<queue->elements[st]<<" ";        st++;        st%=queue->maxCnt;    }    cout<<endl;} void main(){    int len=4;    Queue* queue = createQueue();    int v;    for(int i=0;i<len;i++)    {         v = rand() % 100;         cout<<v<<" ";         InQueue(queue,v);    }    cout<<endl;    outPut(queue);    clearQueue(queue);    for(int i=0;i<5;i++)    {         v = rand() % 100;         cout<<v<<" ";         InQueue(queue,v);    }    cout<<endl;    outPut(queue);    DeQueue(queue,&v);    cout<<v<<endl;    outPut(queue);    front(queue,&v);    cout<<v<<endl;    outPut(queue);    DeQueue(queue,&v);    cout<<v<<endl;    outPut(queue);    DeQueue(queue,&v);    cout<<v<<endl;    outPut(queue);    for(int i=0;i<5;i++)    {         v = rand() % 100;         cout<<v<<" ";         InQueue(queue,v);    }    cout<<endl;    outPut(queue);    if(!InQueue(queue,v))        cout<<"fail"<<endl;    else outPut(queue);    DeQueue(queue,&v);    cout<<v<<endl;    outPut(queue);    DeQueue(queue,&v);    cout<<v<<endl;    outPut(queue);    DeQueue(queue,&v);    cout<<v<<endl;    outPut(queue);    DeQueue(queue,&v);    cout<<v<<endl;    outPut(queue);    for(int i=0;i<3;i++)    {         v = rand() % 100;         cout<<v<<" ";         InQueue(queue,v);    }    cout<<endl;    outPut(queue);    cin>>len;}