golang flag 用法示例

package main
import "flag"
import "fmt"
import "os"
func main() {

if len(os.Args) < 2 {
fmt.Println("too less param")
return
}

var ip = flag.Int("flagname", 1234, "help message for flagname")
var real string
flag.StringVar(&real, "dir", "this is a test","help msg for dir")
flag.Parse()
fmt.Println(*ip)
fmt.Println(real)
}