public static void main(String[] args) throws FileNotFoundException {
Scanner scanner;
String s;
Stack<Double> stack = new Stack<>();
if (args.length > 0) {
scanner = new Scanner(new FileInputStream(args[0]));
} else {
scanner = new Scanner(System.in);
}
Map<String, Double> varMap = new HashMap<>();
CommandFactory singleton = CommandFactory.getInst();
while (scanner.hasNextLine()) {
s = scanner.nextLine();
String[] str = s.split(" ");
Cmd kom = singleton.getCommandByName(str[0]);
if (kom != null) {
try {
kom.exec(stack, varMap, str);
} catch (NumberFormatException e) {
System.out.println("Введена неизвестная команда");
}
} else {
System.out.println("Команда не найдена");
}
}
}
