自己写的链表的基本API,个人认为比较容易出错的地方是对链表的一些操作除了遍历之外,传入的都应该是指向头结点的指针的指针。
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#pragma warning(disable:4996)
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#include<stdio.h>
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#include <stdlib.h>
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typedef int ElemType;
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typedef struct LinkNode {
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ElemType data;
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struct LinkNode *next;
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}LinkNode, *LinkList;
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//链表初始化
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void InitLinkedList(LinkList* list) {
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*list = (LinkNode*)malloc(sizeof(struct LinkNode));
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(*list)->next = NULL;
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}
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//链表在最后位置插入
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void Insert(LinkList *list, ElemType elem) {
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LinkList l = (*list);
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while (l->next != NULL) l = l->next;
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LinkNode* node = (LinkNode*)malloc(sizeof(LinkNode));
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node->data = elem;
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node->next = NULL;
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l->next = node;
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}
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//在链表的指定位置插入,i=1表示在第一个位置插入该值
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InsertLinkListAtPos(LinkList *list, int i, ElemType elem) {
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LinkList l = *list;
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while (--i) l = l->next;
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LinkNode* node = (LinkNode*)malloc(sizeof(LinkNode));
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node->data = elem;
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node->next = NULL;
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node->next = l->next;
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l->next = node;
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}
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//删除指定位置i的链表值,并用elem返回
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DeleteLinkeListAtPos(LinkList *list, int i, ElemType* elem) {
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LinkList l = *list;
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while (--i) l = l->next;
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LinkList p = l->next;
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*elem = p->data;
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l->next = l->next->next;
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free(p);
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}
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//删除链表最后位置的元素
void DeleteLastElem(LinkList *list) {
LinkList l = (*list);
while (l->next->next->next != NULL) l = l->next;
l->next->next = l->next->next->next;
}
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//链表的创建
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void CreateLinkList(LinkList *list) {
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int data;
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scanf("%d", &data);
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if (data != 0)
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{
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LinkNode* node = (LinkNode*)malloc(sizeof(LinkNode));
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node->data = data;
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node->next = NULL;
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(*list)->next = node;
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CreateLinkList(&(*list)->next);
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}
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}
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//遍历链表
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void Traversal(LinkList list){
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while (list->next)
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{
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printf("%d ", list->next->data);
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list = list->next;
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}
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}
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//逆序打印链表
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void InvertedLinkList(LinkList list) {
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if (list->next) {
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InvertedLinkList(list->next);
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}
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printf("%d\n",list->data);
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}
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int main() {
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LinkList list;
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//ElemType elem;
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InitLinkedList(&list);
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CreateLinkList(&list);
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InsertLinkListAtPos(&list, 1, 3);
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//DeleteLinkeListAtPos(&list,2,&elem );
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//InvertedLinkList(list);
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//printf("%d", elem);
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Traversal(list);
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//Insert(&list, 5);
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//printf("%d\n",list->next->data);
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return 0;
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}
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