package mainimport (    "flag"    "strings"    "os"    "fmt")var ARGS stringfunc main() {    var uptime *bool = new(bool)    flag.BoolVar(uptime,"u", false, "print system uptime")    flag.Parse()    ARGS = strings.Join(flag.Args(), " ")    if len(os.Args) < 2 {        flag.Usage()        os.Exit(1)    }    if *uptime {        fmt.Println("12 days")    }}