package main import ( "bufio" "fmt" "log" "os" "strconv" ) func readFile(file *os.File) []int { var keys []int scanner := bufio.NewScanner(file) for scanner.Scan() { line := scanner.Text() if line == "" { break } key, err := strconv.Atoi(string(line)) if err != nil { log.Fatalf("Error processing key for %s: %s", line, err) } keys = append(keys, key) } if err := scanner.Err(); err != nil { log.Fatalf("Scanner error: %s", err) } return keys } func main() { if len(os.Args) < 2 { log.Fatal("You need to specify a file!") } filePath := os.Args[1] file, err := os.Open(filePath) if err != nil { log.Fatalf("Failed to open %s!\n", filePath) } keys := readFile(file) if err := file.Close(); err != nil { log.Fatalf("Failed to close file: %s", err) } fmt.Println(keys) }