Golang反转链表

反转链表

func revoert_linklist(pHead *ListNode) *ListNode {
    var newHead,temp *ListNode
    for pHead != nil  {
        // 赋值头head到临时节点
        temp  = pHead
        // pHead移到了下一位
        pHead = pHead.Next
        // 对新链表做头插
        temp.Next = newHead
        // newHead前移动，准备下一次循环
        newHead = temp
    }
    return newHead
}
测试
link1 := &ListNode{}
    link1.Val = 1
    link2 := &ListNode{}
    link2.Val = 2
    link3 := &ListNode{}
    link3.Val = 3
    link4 := &ListNode{}
    link4.Val = 4
    link5 := &ListNode{}
    link5.Val = 5

    link1.Next = link2
    link2.Next = link3
    link3.Next = link4
    link4.Next = link5

    fmt.Println(link1)
    pre :=revoert_linklist(link1)
    fmt.Println(pre.Val)
    fmt.Println(pre.Next.Val)
    fmt.Println(pre.Next.Next.Val)
    return
&{1 0xc42016c600}
5
4
3