import 'dart:math';

class NumberTool {

  /// 生成随机数
  /// @allNum: 随机数的和
  /// @num: 随机数的数量
  List<int> randomNum(int allNum, {int num = 10}) {
    List<int> randomNumbers = [];
    int remainingNum = allNum;

    for (int i = 0; i < num - 1; i++) {
      int randomNumber = Random().nextInt(remainingNum) + 1;
      randomNumbers.add(randomNumber);
      remainingNum -= randomNumber;
    }

    randomNumbers.add(allNum - randomNumbers.fold(0, (prev, element) => prev + element));

    return randomNumbers;
  }

}