入队/出队

入队/出队操作

#include<iostream>
using namespace std;
struct node
{
    int data;
    node *next;
};
struct queue
{
    node *head;
    node *rear;
};
//入队
queue *push_queue(queue *team,int x)
{
    node *s=new node;
    s->data=x;
    s->next=NULL;
    if(team->rear==NULL)
    {
        team->head=s;
        team->rear=s;
    }
    else
    {
        team->rear->next=s;
        team->rear=s;
    }
    return team;
}
//出队
queue *pop_queue(queue *team)
{
    int x;
    node *s=new node;
    if(team->head==NULL)
    {
        cout<<"empty"<<endl;
    }
    else
    {
        x=team->head->data;
        s=team->head;
        if(team->head==team->rear)
        {
            team->head=NULL;
            team->rear=NULL;
        }
        else
        {
            team->head=team->head->next;
            delete s;
        }
        cout<<x<<endl;
        return  team;
    }
}
int main()
{

    queue *H=new queue;
    H->rear=NULL;
    H->head=NULL;//建一个空队
    cout<<"Input the data pushed to queue"<<endl;
    int x;char c;
    queue *p;
    while(cin>>x)
    {
        p=push_queue(H,x);
        cin.get(c);
        if(c==‘\n‘)break;
    }
    while(p->rear!=NULL)
    {
        p=pop_queue(p);
    }
    return 0;
}