package mainimport (	"fmt"	"io/ioutil"	"log"	"os")func main()  {	path := "C:\\Users\\Administrator\\Downloads\\实用go语言学习"	files, err := ioutil.ReadDir(path)	if err != nil {		log.Fatal(err)	}	for index, f := range files {		fmt.Println(f.Name())		os.Rename(path +"\\" + f.Name(), path +"\\" + fmt.Sprintf("实用go语言学习%02d.html", index))	}}