打印链表

package main
import (
    "fmt"
    "strconv"
)
type ListNode struct {
    Val  int
    Next *ListNode
}
// 打印链表
func PrintListNode(head *ListNode) {
    cur := head
    if head == nil {
        return
    }
    for cur != nil {
        fmt.Print(strconv.Itoa(cur.Val) + "->")
        cur = cur.Next
    }
    fmt.Print("nil\n")
}