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59 lines
1016 B
59 lines
1016 B
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## listat
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### Instructions
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Write a function `ListAt` that takes a pointer to the list `l` and an `int pos` as parameters. This function should return the `NodeL` in the position `pos` of the linked list `l`.
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- In case of error the function should return `nil`.
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### Expected function and structure
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```go
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type NodeL struct {
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Data interface{}
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Next *NodeL
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}
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func ListAt(l *NodeL, pos int) *NodeL{
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}
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```
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### Usage
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Here is a possible program to test your function :
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```go
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package main
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import (
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"fmt"
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piscine ".."
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)
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func main() {
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link := &piscine.List{}
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piscine.ListPushBack(link, "hello")
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piscine.ListPushBack(link, "how are")
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piscine.ListPushBack(link, "you")
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piscine.ListPushBack(link, 1)
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fmt.Println(piscine.ListAt(link.Head, 3).Data)
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fmt.Println(piscine.ListAt(link.Head, 1).Data)
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fmt.Println(piscine.ListAt(link.Head, 7))
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}
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```
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And its output :
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```console
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student@ubuntu:~/[[ROOT]]/test$ go build
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student@ubuntu:~/[[ROOT]]/test$ ./test
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1
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how are
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<nil>
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student@ubuntu:~/[[ROOT]]/test$
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```
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