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| package main
import "fmt"
type ListNode struct {
Val int
Next *ListNode
}
var list *ListNode
func createList(arr []int) {
head := &ListNode{}
cur := head
for _, v := range arr {
cur.Next = &ListNode{Val: v}
cur = cur.Next
}
list = head.Next
}
func printList() {
head := list
for head != nil {
fmt.Printf("%d ", head.Val)
head = head.Next
}
fmt.Println()
}
func insertListIndex(index, val int) {
head := list
for i := 0; i < index-1; i++ {
head = head.Next
}
head.Next = &ListNode{Val: val, Next: head.Next}
}
func deleteListIndex(index int) {
head := list
for i := 0; i < index-1; i++ {
head = head.Next
}
head.Next = head.Next.Next
}
func insertListLast(val int) {
head := list
for head.Next != nil {
head = head.Next
}
head.Next = &ListNode{Val: val}
}
func insertListHead(val int) {
head := list
head = &ListNode{Val: val, Next: head}
list = head
}
func updateListIndex(index, val int) {
head := list
for i := 0; i < index; i++ {
head = head.Next
}
head.Val = val
}
func main() {
arr := []int{1, 2, 3, 4, 5, 7, 6}
createList(arr)
printList()
insertListIndex(4, 10)
printList()
deleteListIndex(4)
printList()
insertListLast(100)
printList()
insertListHead(1000)
printList()
updateListIndex(4, 10000)
printList()
}
|
