制作人类可读的整数表示

Question

对于那些喜欢这种事情的人来说，这是一个编码问题。让我们看看您的函数实现（当然是您选择的语言），该函数返回指定整数的人类可读字符串表示形式。例如：

• humanReadable(1) 返回“一”。
• humanReadable(53) 返回“五十三”。
• humanReadable(723603) 返回“七十二万三千六百零三”。
• humanReadable(1456376562) 返回“十亿、四亿五千六百万、三十七万六千、五百六十二”。

特别聪明/优雅的解决方案可加分！

这似乎是一个毫无意义的练习，但这种算法在现实世界中有很多应用（尽管支持高达十亿的数字可能有点矫枉过正:-)

Answer 1

已经有一个关于此的问题：将整数转换为书面数字

答案是针对 C# 的，但我认为你可以弄清楚。

Answer 2

import math

def encodeOnesDigit(num):
   return ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'][num]

def encodeTensDigit(num):
   return ['twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'][num-2]

def encodeTeens(num):
   if num < 10:
      return encodeOnesDigit(num)
   else:
      return ['ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'][num-10]

def encodeTriplet(num):
   if num == 0: return ''
   str = ''
   if num >= 100:
      str = encodeOnesDigit(num / 100) + ' hundred'
   tens = num % 100
   if tens >= 20:
      if str != '': str += ' '
      str += encodeTensDigit(tens / 10)
      if tens % 10 > 0:
         str += '-' + encodeOnesDigit(tens % 10)
   elif tens != 0:
      if str != '': str += ' '
      str += encodeTeens(tens)
   return str

def zipNumbers(numList):
   if len(numList) == 1:
      return numList[0]
   strList = ['', ' thousand', ' million', ' billion'] # Add more as needed
   strList = strList[:len(numList)]
   strList.reverse()
   joinedList = zip(numList, strList)
   joinedList = [item for item in joinedList if item[0] != '']
   return ', '.join(''.join(item) for item in joinedList)

def humanReadable(num):
   if num == 0: return 'zero'
   negative = False
   if num < 0:
      num *= -1
      negative = True
   numString = str(num)
   tripletCount = int(math.ceil(len(numString) / 3.0))
   numString = numString.zfill(tripletCount * 3)
   tripletList = [int(numString[i*3:i*3+3]) for i in range(tripletCount)]
   readableList = [encodeTriplet(num) for num in tripletList]
   readableStr = zipNumbers(readableList)
   return 'negative ' + readableStr if negative else readableStr

Answer 3

最多支持 9.99 亿，但不能为负数：

String humanReadable(int inputNumber) {
  if (inputNumber == -1) {
    return "";
  }
  int remainder;
  int quotient;
  quotient = inputNumber / 1000000;
  remainder = inputNumber % 1000000;
  if (quotient > 0) {
    return humanReadable(quotient) + " million, " + humanReadable(remainder);
  }
  quotient = inputNumber / 1000;
  remainder = inputNumber % 1000;
  if (quotient > 0) {
    return humanReadable(quotient) + " thousand, " + humanReadable(remainder);
  }
  quotient = inputNumber / 100;
  remainder = inputNumber % 100;
  if (quotient > 0) {
    return humanReadable(quotient) + " hundred, " + humanReadable(remainder);
  }
  quotient = inputNumber / 10;
  remainder = inputNumber % 10;
  if (remainder == 0) {
    //hackish way to flag the algorithm to not output something like "twenty zero"
    remainder = -1;
  }
  if (quotient == 1) {
    switch(inputNumber) {
    case 10:
      return "ten";
    case 11:
      return "eleven";
    case 12:
      return "twelve";
    case 13:
      return "thirteen";
    case 14:
      return "fourteen";
    case 15:
      return "fifteen";
    case 16:
      return "sixteen";
    case 17:
      return "seventeen";
    case 18:
      return "eighteen";
    case 19:
      return "nineteen";
    }
  }
  switch(quotient) {
  case 2:
    return "twenty " + humanReadable(remainder);
  case 3:
    return "thirty " + humanReadable(remainder);
  case 4:
    return "forty " + humanReadable(remainder);
  case 5:
    return "fifty " + humanReadable(remainder);
  case 6:
    return "sixty " + humanReadable(remainder);
  case 7:
    return "seventy " + humanReadable(remainder);
  case 8:
    return "eighty " + humanReadable(remainder);
  case 9:
    return "ninety " + humanReadable(remainder);
  }
  switch(inputNumber) {
  case 0:
    return "zero";
  case 1:
    return "one";
  case 2:
    return "two";
  case 3:
    return "three";
  case 4:
    return "four";
  case 5:
    return "five";
  case 6:
    return "six";
  case 7:
    return "seven";
  case 8:
    return "eight";
  case 9:
    return "nine";
  }
}

Answer 4

using System;

namespace HumanReadable
{
    public static class HumanReadableExt
    {
        private static readonly string[] _digits = {
                                                       "", "one", "two", "three", "four", "five",
                                                       "six", "seven", "eight", "nine", "eleven", "twelve",
                                                       "thirteen", "fourteen", "fifteen", "sixteen", "seventeen",
                                                       "eighteen", "nineteen"
                                                   };

        private static readonly string[] _teens = {
                                                      "", "", "twenty", "thirty", "forty", "fifty",
                                                      "sixty", "seventy", "eighty", "ninety"
                                                  };

        private static readonly string[] _illions = {
                                                        "", "thousand", "million", "billion", "trillion"
                                                    };

        private static string Seg(int number)
        {
            var work = string.Empty;

            if (number >= 100) 
                work += _digits[number / 100] + " hundred ";

            if ((number % 100) < 20)
                work += _digits[number % 100];
            else
                work += _teens[(number % 100) / 10] + "-" + _digits[number % 10];

            return work;
        }

        public static string HumanReadable(this int number)
        {
            if (number == 0)
                return "zero";
            var work = string.Empty;

            var parts = new string[_illions.Length];

            for (var ind = 0; ind < parts.Length; ind++)
                parts[ind] = Seg((int) (number % Math.Pow(1000, ind + 1) / Math.Pow(1000, ind)));

            for (var ind = 0; ind < parts.Length; ind++)
                if (!string.IsNullOrEmpty(parts[ind]))
                    work = parts[ind] + " " + _illions[ind] + ", " + work;

            work = work.TrimEnd(',', ' ');

            var lastSpace = work.LastIndexOf(' ');
            if (lastSpace >= 0)
                work = work.Substring(0, lastSpace) + " and" + work.Substring(lastSpace);

            return work;
        }
    }

    class Program
    {

        static void Main(string[] args)
        {
            Console.WriteLine(1.HumanReadable());
            Console.WriteLine(53.HumanReadable());
            Console.WriteLine(723603.HumanReadable());
            Console.WriteLine(1456376562.HumanReadable());
            Console.ReadLine();
        }
    }
}

Answer 5

这个函数的实现有一个很大的问题。这是它未来的本地化。该函数由以英语为母语的人编写，很可能不适用于英语以外的任何其他语言。为世界上任何人类语言方言编写通用的、易于本地化的函数几乎是不可能的，除非你真的需要保持它的通用性。实际上，在现实世界中，您不需要使用巨大的整数进行操作，因此您可以将所有数字保存在一个大（甚至不是那么大）的字符串数组中。

Answer 6

一致认为存在许多现实世界的应用程序。因此，现实世界中已经有许多实现。

它几乎永远都是 bsdgames 的一部分......

> man number