s->next=NULL什么意思
时间: 2024-05-17 15:13:56 浏览: 17
s 是一个指针变量,它指向链表中的一个节点。s->next 是节点中的一个指针成员,它指向链表中 s 节点的下一个节点。s->next = NULL 的意思是将 s 节点的下一个指针设置为 NULL,也就是将 s 节点的后继节点指针指向空地址,表示 s 节点是链表中的最后一个节点,也就是链表的末尾。这通常是在链表的创建和插入节点等操作中使用。
相关问题
s->next=NULL; r->next=s; r=s;
These three lines of code are used to add a new node 's' at the end of a linked list.
Explanation:
- The first line 's->next=NULL;' sets the 'next' pointer of the new node 's' to NULL, indicating that it is the last node in the list.
- The second line 'r->next=s;' sets the 'next' pointer of the current last node 'r' to 's', linking the new node 's' to the list.
- The third line 'r=s;' updates the variable 'r' to point to the new last node 's'. This ensures that future nodes added to the list will be added after 's'.
s = (LinkNode *)malloc(sizeof(LinkNode)); assert(s != NULL); s->score = score; s->rank = rank; s->sex = sex; strcpy(s->name, name); strcpy(s->college, college); strcpy(s->item, item); s->next = NULL; Head->next = s;其中代码改成头插法怎么改
将链表节点插入到链表头部的操作称为头插法,可以将新节点插入到链表头部,然后让新节点的next指向原来的头节点。头插法的代码实现如下:
```c
void Create(LinkList &Head, int score, int rank, int sex, char name[], char college[], char item[]) {
LinkNode *s = (LinkNode *)malloc(sizeof(LinkNode));
assert(s != NULL);
s->score = score;
s->rank = rank;
s->sex = sex;
strcpy(s->name, name);
strcpy(s->college, college);
strcpy(s->item, item);
s->next = Head->next;
Head->next = s;
}
```
相比于原来的代码,头插法只需在新节点的next指针赋值时,将其指向原来的头节点即可,同时不需要遍历链表找到末尾节点。
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