private void readCommand() {
try {
System.out.print(Message.instance().getMessage("prompt"));
String cmd = sc.nextLine();
CommandManager.singleton().runCommand(cmd);
} catch (RuntimeException e) {
System.out.println("Erro! " + e.getMessage());
}
readCommand();
}
private void mainMenu() {
System.out.println(Message.instance().getMessage("interpreter"));
System.out.println(Message.instance().getMessage("version"));
System.out.println(Message.instance().getMessage("help"));
}