标签:style blog color re c 代码 div c++
1.为了反转这个单链表,我们先让头结点的next域指向结点2,再让结点1的next域指向结点3,最后将结点2的next域指向结点1,就完成了第一次交换,顺序就变成了Header-结点2-结点1-结点3-结点4-NULL,然后进行相同的交换将结点3移动到结点2的前面,然后再将结点4移动到结点3的前面就完成了反转,思路有了,就该写代码了:
1 LinkedList ReverseSinglyLinkedList(LinkedList list) 2 { 3 LNode *tmp = NULL; 4 LNode *p = NULL; 5 6 if (list == NULL) 7 { 8 return NULL; 9 } 10 tmp = list->next; 11 while (tmp->next != NULL) 12 { 13 p = tmp->next; 14 tmp->next = p->next; 15 p->next = list->next; 16 list->next = p; 17 } 18 return list; 19 }
2.有序单链表的合并就是两个之前都已排好序的链表,将它们合并成一个链表。合并的过程中对于两个链表值相等的结点也要链到最终的链表中去。
1 struct Node{ 2 int data; 3 Node *next; 4 }; 5 6 typedef struct Node Node; 7 8 Node *Merge(Node *head1,Node *head2) 9 { 10 Node *p1 = NULL; 11 Node *p2 = NULL; 12 Node *head = NULL; 13 14 //找出两个链表中第一个结点较小的结点,head记录较小结点的头结点 15 if(head1->next->data < head2->next->data) 16 { 17 head = head1; 18 p1 = head1->next; 19 p2 = head2->next; 20 } 21 else 22 { 23 head = head2; 24 p2 = head2->next; 25 p1 = head1->next; 26 } 27 28 Node *pcur = head; 29 30 //在两个链表中遍历比较,将值较小的结点链接到pcur结点后 31 while(p1 != NULL && p2 != NULL) 32 { 33 if(p1->data <= p2->data) 34 { 35 pcur->next = p1; 36 pcur = p1; 37 p1 = p1->next; 38 } 39 else 40 { 41 pcur->next = p2; 42 pcur = p2; 43 p2 = p2->next; 44 } 45 } 46 //将p1或p2剩余的结点链到pcur之后,完成整个合并的过程 47 if(p1 != NULL) 48 pcur->next = p1; 49 if(p2 != NULL) 50 pcur->next = p2; 51 52 return head; 53 }
标签:style blog color re c 代码 div c++
原文地址:http://www.cnblogs.com/cy568searchx/p/3865892.html