使用Crystal语法将数字转换为Crystal Report中的单词

Question

我正在研究使用Crystal Report和Crystal语法将数字转换为单词的任务。 我使用下面的代码在<100K的任何金额上都做得很好，但是面临金额> 100K的问题（以VN货币计算，我们甚至可以转换数十亿的奇数，而不仅仅是1万或数百万）。有人能帮我找到解决这个问题的方法吗？ 预先感谢您的帮助。

app.post('/api/reservations', (req, res) => {
  const resDate = new Date(req.body.reservationDate).toISOString();
  const queryDate = new Date(req.body.reservationDate);
  const tableDict = req.body.tableDict;
  const slot = req.body.timeSlot;
  const seats = req.body.seats;
  const restaurant = req.body.restaurant;
  const customer = req.body.customer;
  const comment = req.body.comment;

  function gteQueryDate(date) {
    return date.toISOString();
  }

  function lteQueryDate(date) {
    date.setDate(date.getDate() + 1);
    return date.toISOString();
  }

  const gteDate = gteQueryDate(queryDate);
  const lteDate = lteQueryDate(queryDate);

  const sortedTables = [];
  for (i = 0; i < tableDict[slot].length - 1; i++) {
    if (tableDict[slot][i] !== null && tableDict[slot][i].seats >= seats) {
      sortedTables.push([tableDict[slot][i]._id, tableDict[slot][i].seats]);
    }
  }

  sortedTables.sort(function(a, b) {
    return a[1] - b[1];
  });

  var createReservation = function(tableId) {
    console.log("called function with id : " + tableId);
    Reservation.findOne({
        'restaurant': restaurant,
        'timeSlot.slot': slot,
        'timeSlot.table': tableId,
        'reservationDate': {
          '$gte': gteDate,
          '$lte': lteDate
        }
      })
      .then(reservation => {
        if (!reservation) {
          console.log("can create reservation with id: " + tableId);
          var timeSlot = [{
            'slot': slot,
            'table': tableId
          }];
          const newReservation = new Reservation({
            seats: seats,
            comment: comment,
            timeSlot: timeSlot,
            customer: customer,
            restaurant: restaurant,
            reservationDate: resDate
          });
          newReservation.save()
            .then(result => {
              res.send(result);
            })
            .catch(err => {
              console.log(err);
            });
        } else {
          console.log("reservation with id: " + tableId + " exists already.");
        }
      })
      .catch(err => {
        console.log(err);
      });
  }

  for (j = 0; j < sortedTables.length; j++) {
    var tableId = sortedTables[j][0];
    createReservation(tableId);
  }
});