48 lines
774 B
Go
48 lines
774 B
Go
|
package main
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
type ListNode struct {
|
||
|
|
Val int
|
||
|
|
Next *ListNode
|
||
|
|
}
|
||
|
|
|
||
|
|
func reverseList(head *ListNode) *ListNode {
|
||
|
|
var pre *ListNode
|
||
|
|
cur := head
|
||
|
|
for cur != nil {
|
||
|
|
tmp := cur.Next //暂存初始方向
|
||
|
|
cur.Next = pre //改变链表方向
|
||
|
|
pre = cur //移动指针
|
||
|
|
cur = tmp //移动指针2
|
||
|
|
}
|
||
|
|
return pre
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
head := &ListNode{
|
||
|
|
Val: 1,
|
||
|
|
Next: &ListNode{
|
||
|
|
Val: 2,
|
||
|
|
Next: &ListNode{
|
||
|
|
Val: 3,
|
||
|
|
Next: &ListNode{
|
||
|
|
Val: 4,
|
||
|
|
Next: &ListNode{
|
||
|
|
Val: 5,
|
||
|
|
Next: nil,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
fmt.Printf("%#v\n", head)
|
||
|
|
ret := reverseList(head) //反转之后的头节点
|
||
|
|
fmt.Printf("%#v\n", ret)
|
||
|
|
for ret != nil {
|
||
|
|
fmt.Print(ret.Val, "->")
|
||
|
|
ret = ret.Next //指针移动，直到链表的尾部
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|