head==NULL与head->next==NULL区别是什么

head==NULL与head->next==NULL区别是什么 LINKLIST *head = NULL,*t for(p = head; p->next = NULL; p = p->next);p->next = int insert(int id){node_t *p,*q;/* creat new node */q = new_node(id);if(q == NULL) return -1;/* nothing in the link */if(head == NULL){head = q; return 0;}/* get the last one */for(p = head; p->nex C语言 中&和 请参照这个程序#include#define NULL 0struct student{int num;float score;struct student *next;};void main(){struct student *head,a,b,c,*p;a.num=8011;a.score=90.5;b.num=7022;b.score=99;c.num=7033;c.score=88;head=&a;a.next=&b;b.nex 数据结构中 for(i=0;iname[i]=datename[i]; head->next=null; pointer=head; for(i=0;iname[i]=datename[i];head->next=null; pointer=head;head指向了name[0]那head是否还指向name[1],如果指向了它,那name[0]怎么办同理后面的name2345max 头结点的指针为空是什么情况,在一段程序中有这样的语句,if(head==null||head->next==null)head->next==null这句话的意思知道是第一个结点为空,即空链表,但是head==null这句话又代表什么意思呢,既然设置 两题单链表逆置,求讲解1.p=head->next;head->next=NULL;while(p){s=p;p=p->next;s->next=head->next;head->=s;}p=head-next;2.p=head->next;q=p->next;p->next=NULL;while(q!=NULL){r=q->next;q->next=p;p=q;q=r;} head->next=p；本人初学数据结构, head是单链表头指针printf(*head=%d &head=%d head=%d head->next=%d ,*head,&head,head,head->next);head是单链表头指针 printf(*head=%d &head=%d head=%d head->next=%d ,*head,&head,head,head->next); C++中编程出现function does not take 1 parameters#include stdio.h#include stdlib.h#define NULL 0struct node{int num;struct node *next;};void main(){struct node *creat();void print();struct node *head;head=NULL;head=creat(head);print(head);}st 这段C代码i == head->next=NULL:head->next = p; 提示错误lvalue required as left operand of assignment|, head head head HEAD head head head head