alist *sortallinfo(alist *head)
{
    alist *p1=NULL,*p2=NULL,*px=NULL,*py=NULL,*p0=NULL;
    for (px=head;px!=NULL;px=px->next)
    for (py=px;py!=NULL;py=py->next)
    {
        p1=py;
        p2=p1->next;
        if (strcmp(p1->name,p2->name)>0)
        {
            if (p1!=head)
            {
            p1->next=p2->next;
            p0->next=p2;
            p2->next=p1;
            }
            else
            {
            p1->next=p2->next;
            p2->next=p1;
            head=p2;
            }
        }
        p0=p1;
    }
    printf("排序成功，请查看！\n");
    return head;
}这段代码有问题么？