顺序队列C/C++实现

#include <iostream>
using namespace std;

const int MAXSIZE = 1000;
typedef int ELEMTYPE;
const int N = 10;
typedef struct {
    ELEMTYPE data[MAXSIZE];
    int head;
    int tail;
}Queue;

Queue Q;
void initQueue(Queue &Q);
void printQueue(Queue &Q);
int isQueueEmpty(Queue &Q);
int isQueueFull(Queue &Q);
int EnQueue(Queue &Q,ELEMTYPE e);
int DeQueue(Queue &Q,ELEMTYPE &e);

int main()
{

    for(int i=0;i<N;i++)
    {
        EnQueue(Q,i);
    }
    printQueue(Q);
    return 0;
}

void initQueue(Queue &Q)
{

    Q.head = 0;
    Q.tail = 0;
}
void printQueue(Queue &Q)
{
    ELEMTYPE e;
    while(!isQueueEmpty(Q))
    {
        DeQueue(Q,e);
        cout<<e<<"\t";
    }
}
int isQueueEmpty(Queue &Q)
{
    return Q.head==Q.tail;
}

int isQueueFull(Queue &Q)
{
    return (Q.tail+1)%MAXSIZE == Q.head;
}

int EnQueue(Queue &Q,ELEMTYPE e)
{

    if(isQueueFull(Q)) return 0;
    Q.tail = (Q.tail+1)%MAXSIZE;
    Q.data[Q.tail] = e;
    return 1;
}
int DeQueue(Queue &Q,ELEMTYPE &e)
{
    if(isQueueEmpty(Q)) return 0;
    Q.head = (Q.head+1)%MAXSIZE;
    e = Q.data[Q.head];
    return 1;
}

**注意顺序队列的初始化可以让Q.head=Q.tail=0，也可以Q.head=Q.tail=1；

前者相当于带头结点的链队列;后者相当于不带头结点的链队列**