for _,i:=range b { if i<'0' || i>'9' { bFlag=false break } } aInt,_ := strconv.Atoi(a) bInt,_ := strconv.Atoi(b) if aFlag && bFlag { fmt.Printf("%d + %d = %d",aInt,bInt,aInt+bInt) }else if aFlag && !bFlag{ fmt.Printf("%d + ? = ?",aInt) } else i...