您好，這是我第一次真正嘗試編寫實(shí)際的 Go 命令行程序，所以請?jiān)徫乙矎幕ヂ?lián)網(wǎng)上刪除了一些代碼。我實(shí)際上想要做的是能夠選擇何時(shí)加密或解密，同時(shí)仍然能夠選擇 src 文件和 dest 文件。在此先感謝您的幫助。我找不到任何可靠的解釋，或者至少我找不到任何東西。package mainimport ("crypto/aes""crypto/cipher""crypto/rand""errors""io""io/ioutil""log""os")func decrypt(key, ciphertext []byte) (plaintext []byte, err error) {  var block cipher.Block  if block, err = aes.NewCipher(key); err != nil {      return }  if len(ciphertext) < aes.BlockSize {    err = errors.New("ciphertext too short")    return }  iv := ciphertext[:aes.BlockSize]  ciphertext = ciphertext[aes.BlockSize:]  cfb := cipher.NewCFBDecrypter(block, iv)  cfb.XORKeyStream(ciphertext, ciphertext)  plaintext = ciphertext   return }func encrypt(key, text []byte) (ciphertext []byte, err error) {  var block cipher.Block  if block, err = aes.NewCipher(key); err != nil {      return nil, err }  ciphertext = make([]byte, aes.BlockSize+len(string(text)))  iv := ciphertext[:aes.BlockSize]  if _, err = io.ReadFull(rand.Reader, iv); err != nil {      return }  cfb := cipher.NewCFBEncrypter(block, iv)  cfb.XORKeyStream(ciphertext[aes.BlockSize:], text)  return }func encryptFileData(srcFile, destFile string) {  if len(os.Args) > 1 {      srcFile = os.Args[1]  }  if len(os.Args) > 2 {      destFile = os.Args[2] }  var cipherText, plainText []byte  var err error  key := []byte("abcdefg123456789")  plainText, _ = ioutil.ReadFile(srcFile)  if cipherText, err = encrypt(key, plainText); err != nil {      log.Fatal(err)  }  ioutil.WriteFile(destFile, cipherText, 0755)   return  }func decryptFileData(srcFile, destFile string) {  if len(os.Args) > 1 {      srcFile = os.Args[1]  }  if len(os.Args) > 2 {      destFile = os.Args[2]  }  var cipherText, plainText []byte  var err error  key := []byte("abcdefg123456789")  cipherText, _ = ioutil.ReadFile(srcFile)  if plainText, err = decrypt(key, cipherText); err != nil {      log.Fatal(err)  }