头结点没有数据的单链表
方法1：
LinkList reverse_list(LinkList list) { LinkedNode *pre = list; LinkedNode *cur = list->next; LinkedNode *next = NULL; if(list == NULL || list->next == NULL) return; next=cur->next; cur->next = NULL; pre=cur; cur=next; /*在这里实现翻转*/ while(cur != NULL) { next = cur->next; cur->next = pre; pre = cur; cur = next; } list->next = pre; return list; }
方法2，3
也可以直接调用上一讲头结点有数据的逆置操作
完整代码如下：
#include <stdio.h> #include <malloc.h> typedef int DataType; typedef struct node { DataType data; struct node *next; }LinkedNode, *LinkList; LinkList create_list() { DataType value[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; int len = sizeof(value) / sizeof(DataType); int i = 0; LinkedNode *list_head = NULL; LinkedNode *temp = NULL; LinkedNode *p = NULL; list_head = (LinkedNode*)malloc(sizeof(LinkedNode)); //list_head->data = value[0]; list_head->next = NULL; temp = list_head; for(i = 0; i < len; i++) { while (temp->next != NULL) { temp = temp->next; } p = (LinkedNode*)malloc(sizeof(LinkedNode)); p->data = value[i]; p->next = NULL; temp->next = p; } return list_head; } void print(LinkList list) { LinkedNode *temp = NULL; if(list == NULL) return; temp = list->next; while(temp != NULL) { printf("%d ", temp->data); temp = temp->next; } printf("\n"); return; } LinkList reverse_list(LinkList list) { LinkedNode *pre = list; LinkedNode *cur = list->next; LinkedNode *next = NULL; if(list == NULL || list->next == NULL) return; next=cur->next; cur->next = NULL; pre=cur; cur=next; /*在这里实现翻转*/ while(cur != NULL) { next = cur->next; cur->next = pre; pre = cur; cur = next; } list->next = pre; return list; } LinkList reverse_list2(LinkList list) { LinkedNode *pre = list; LinkedNode *cur = list->next; LinkedNode *next = NULL; if(list == NULL || list->next == NULL) return; /*在这里实现翻转*/ while(cur != NULL) { next = cur->next; cur->next = pre; pre = cur; cur = next; } list->next = NULL; list = pre; return list; } void reverse_the_list(LinkedNode *cur, LinkList *list) { LinkedNode *next = NULL; if(cur == NULL || cur->next == NULL) { *list = cur; } else { next = cur->next; reverse_the_list(next, list); next->next = cur; cur->next = NULL; } return; } int main() { LinkList list = NULL; LinkedNode *temp = NULL; LinkedNode *temp1 = NULL; LinkList list2 = NULL; LinkList list3 = NULL; list = create_list(); print(list); list=reverse_list(list); printf("after first reverse:\n"); print(list); temp=list->next; temp1=list; temp=reverse_list2(temp); temp1->next=temp; printf("after second reverse:\n"); print(temp1); list2=temp1->next; list3=temp1->next; temp = temp1; reverse_the_list(list2, &list3); temp->next=list3; printf("after third reverse:\n"); print(temp); return 0; }
实验结果：
