Error in go program

Getting Help Code Review
1

Hi guys, I trying to write a directory enumerater in Golang with net/http, os, bufio and fmt, I’m a newbie of golang because I study this language from few time, the code is this:

2 
$ go vet main.go
./main.go:23:22: Sprint call has possible formatting directive %s
$

Sprint

req,err1:=http.Get(fmt.Sprint("%s/%s",os.Args[1],scanner.Text()))

should be Sprintf

req,err1:=http.Get(fmt.Sprintf("%s/%s",os.Args[1],scanner.Text()))

Also, handle errors. For example,

req,err1:=http.Get(fmt.Sprintf("%s/%s",os.Args[1],scanner.Text()))
if err1 != nil {
    // handle error
    continue
}