【Go】GUIアプリを作ってみる | Narumium Blog

package main import ( "fmt" "os" "strconv" "time" "github.com/faiface/beep" "github.com/faiface/beep/mp3" "github.com/faiface/beep/speaker" "fyne.io/fyne" "fyne.io/fyne/app" "fyne.io/fyne/layout" "fyne.io/fyne/theme" "fyne.io/fyne/widget" ) var mp3name = "coin01.mp3" func doBeep(path string) error { if path == "" { path = mp3name } f, _ := os.Open(path) s, format, err := mp3.Decode(f) if err != ni