Author Archives: demensdeum

final _map = Map<int, String>(); 

  String read({required int at}) { 
    return _map[at] ?? ""; 
  } 

  void write({required String symbol, required int at}) { 
    _map[at] = symbol; 
  } 
}

  int _index = 0; 
  InfiniteTape _infiniteTape; 
  TapeHead(this._infiniteTape) {} 

  String next() { 
    _index += 1; 
    move(to: _index); 
    final output = read(); 
    return output; 
  } 

  String previous() { 
    _index -= 1; 
    move(to: _index); 
    final output = read(); 
    return output; 
  } 

  void move({required int to}) { 
    this._index = to; 
  } 

  String read() { 
    return _infiniteTape.read(at: this._index); 
  } 

  void write(String symbol) { 
    _infiniteTape.write(symbol: symbol, at: this._index); 
  } 

  int index() { 
    return _index; 
  } 
} 

  FiniteStateControlDelegate? delegate = null; 

  void handle({required String symbol}) { 
    if (symbol == OPCODE_PRINT) { 
      final argument = delegate?.nextSymbol(); 
      print(argument);
    } 
    else if (symbol == OPCODE_GENERATE_RANDOM_NUMBER_FROM_ZERO_TO_AND_WRITE_AFTER) { 
      final to = int.tryParse(delegate!.nextSymbol())!; 
      final value = new Random().nextInt(to); 
      delegate!.nextSymbol(); 
      delegate!.write(value.toString()); 
    } 
    else if (symbol == OPCODE_INPUT_TO_NEXT) { 
      final input = stdin.readLineSync()!; 
      delegate?.nextSymbol(); 
      delegate?.write(input); 
    } 
    else if (symbol == OPCODE_COPY_FROM_TO) { 
      final currentIndex = delegate!.index(); 

и т.д. 

const OPCODE_PRINT = "print"; 
const OPCODE_INCREMENT_NEXT = "increment next"; 
const OPCODE_DECREMENT_NEXT = "decrement next"; 
const OPCODE_IF_PREVIOUS_NOT_EQUAL = "if previous not equal"; 
const OPCODE_MOVE_TO_INDEX = "move to index"; 
const OPCODE_COPY_FROM_TO = "copy from index to index"; 
const OPCODE_INPUT_TO_NEXT = "input to next"; 
const OPCODE_GENERATE_RANDOM_NUMBER_FROM_ZERO_TO_AND_WRITE_AFTER = "generate random number from zero to next and write after"; 

hello world 
stop

Считаем до 16-ти

0
if previous not equal
16
copy from index to index
1
8
print
?
move to index
0
else
copy from index to index
1
16
print
?
print
Finished!
stop