ATM Dart

import 'dart:io';

bool repeat = true;

void main() {
  Atm atm_satu = Atm(123, 5000);
  Atm atm_dua = Atm(456, 10000);

  do {
    stdout.write("\nMasukkan PIN : ");
    var pinMasuk = int.parse(stdin.readLineSync());

    if(pinMasuk == atm_satu.pin) {
      atm_satu.menu();
    } else if(pinMasuk == atm_dua.pin) {
      atm_dua.menu();
    } else {
      print("Pin Salah");
    }
  }while(repeat == true);
}

class Atm {
  int pin;
  int saldo;

  Atm(int pin, int saldo) {
    this.pin = pin;
    this.saldo = saldo;
  }

  void menu() {
    do {
      print("Selamat datang \n1. Tarik Tunai\n2. Setor Tunai\n3. Cek Saldo\n4. Ganti Akun\n5. Keluar Aplikasi\n\n");
      stdout.write('Pilih Menu : ');
      var option = int.parse(stdin.readLineSync());

      switch(option) {
        case 1:
          stdout.write('\nTarik Tunai \nNominal : ');
          int withdrawal = int.parse(stdin.readLineSync());
          if(withdrawal > saldo) {
            print("\nSaldo anda tidak cukup");
            print("Saldo anda sekarang $saldo");
          } else {
            saldo -= withdrawal;
            print("\nJumlah Penarikan : $withdrawal\nSaldo anda  sekarang : $saldo\n\n");
          }
          break;

        case 2:
          stdout.write('\nSetor Tunai \nNominal :');
          int deposited = int.parse(stdin.readLineSync());
          saldo += deposited;
          print("\nJumlah Setoran : $deposited\nSaldo anda sekarang : $saldo\n\n");
          break;

        case 3:
          print("\nSaldo anda sekarang $saldo\n\n");
          break;

        case 4:
          main();
          break;

        case 5:
          print("\nTerima Kasih");
          exit(0);
          break;

        default:
          print('\nMenu yang ada pilih tidak ada\n\n');
      }
    } while(repeat == true);
  }
}