循环打印文本切片值

package main

import (
    "fmt"
    "sync"
)

var slice = []string{"apple", "banana", "orange"}
var index int
var mutex sync.Mutex

func main() {
         P()
         P()
         P()
        
}

func P() {
    mutex.Lock()
    defer mutex.Unlock()

    index := index % len(slice)
    fmt.Println(slice[index])
    index++
}