file.go
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)
}go build file.go
./file -flagname 3333 -dir ccccccccccccccc
//out put
// 3333
//ccccccccccccccc
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