go parse execution flags

main.go

package main

import (
	"flag"
	"fmt"
	"os"
)

type Car struct {
	Model []string
}

var flagname int
var help bool
var count []string
func init() {
	flag.IntVar(&flagname, "flagname", 1234, "help message for flagname")
	flag.BoolVar(&help, "help", false, "Show this help")
	flag.BoolVar(&help, "h", false, "Show this help")
	flag.Parse()
	if help {

		flag.PrintDefaults()
	}
	count := os.Args
	if len(count) == 0 {
		flag.PrintDefaults()
		os.Exit(1)
	}
}
func main() {

	c := &Car{}

	for i := 0; i < 10; i++ {
		c.Model = append(c.Model, "item "+fmt.Sprint(i))
	}

	fmt.Println(c.Model[5])
	fmt.Println(flagname)
}