问题描述

我见过很多算法，你给它们一个数字，比如123".并将其转换为一百二十三.但我似乎找不到相反的东西，而且我找到的那些只能做到 1000 号.谁能以正确的方式指导我，因为我可以做些什么来创建一个采用"的方法.一千二百三十四"并回馈1234"

I have seen a lot of algorithms in which you give them a number say "123" and it converts it to One hundred twenty three. But I can't seem to find something that does the opposite, and the ones I did find only do it up to the number 1000. Can anyone direct me in the correct way as what I could do to create a method that takes "One thousand two hundred and thirty four" and gives back "1234"

推荐答案

我希望下面的代码在大多数情况下都能完成这项工作.但是，由于我尚未正确测试，可能需要进行一些修改.

I hope below code will do the job in most of the cases. However some modification might be required as I've not tested properly yet.

假设:

1. 不允许使用正、负、加、减.
2. Lac, crore 是不允许的.
3. 仅支持英语.

如果你需要支持前两点，你可以很容易地做到这一点.

If you need to support first two points, you can very easily do that.

    boolean isValidInput = true;
    long result = 0;
    long finalResult = 0;
    List<String> allowedStrings = Arrays.asList
    (
    "zero","one","two","three","four","five","six","seven",
    "eight","nine","ten","eleven","twelve","thirteen","fourteen",
    "fifteen","sixteen","seventeen","eighteen","nineteen","twenty",
    "thirty","forty","fifty","sixty","seventy","eighty","ninety",
    "hundred","thousand","million","billion","trillion"
    );

    String input="One hundred two thousand and thirty four";

    if(input != null && input.length()> 0)
    {
        input = input.replaceAll("-", " ");
        input = input.toLowerCase().replaceAll(" and", " ");
        String[] splittedParts = input.trim().split("\s+");

        for(String str : splittedParts)
        {
            if(!allowedStrings.contains(str))
            {
                isValidInput = false;
                System.out.println("Invalid word found : "+str);
                break;
            }
        }
        if(isValidInput)
        {
            for(String str : splittedParts)
            {
                if(str.equalsIgnoreCase("zero")) {
                    result += 0;
                }
                else if(str.equalsIgnoreCase("one")) {
                    result += 1;
                }
                else if(str.equalsIgnoreCase("two")) {
                    result += 2;
                }
                else if(str.equalsIgnoreCase("three")) {
                    result += 3;
                }
                else if(str.equalsIgnoreCase("four")) {
                    result += 4;
                }
                else if(str.equalsIgnoreCase("five")) {
                    result += 5;
                }
                else if(str.equalsIgnoreCase("six")) {
                    result += 6;
                }
                else if(str.equalsIgnoreCase("seven")) {
                    result += 7;
                }
                else if(str.equalsIgnoreCase("eight")) {
                    result += 8;
                }
                else if(str.equalsIgnoreCase("nine")) {
                    result += 9;
                }
                else if(str.equalsIgnoreCase("ten")) {
                    result += 10;
                }
                else if(str.equalsIgnoreCase("eleven")) {
                    result += 11;
                }
                else if(str.equalsIgnoreCase("twelve")) {
                    result += 12;
                }
                else if(str.equalsIgnoreCase("thirteen")) {
                    result += 13;
                }
                else if(str.equalsIgnoreCase("fourteen")) {
                    result += 14;
                }
                else if(str.equalsIgnoreCase("fifteen")) {
                    result += 15;
                }
                else if(str.equalsIgnoreCase("sixteen")) {
                    result += 16;
                }
                else if(str.equalsIgnoreCase("seventeen")) {
                    result += 17;
                }
                else if(str.equalsIgnoreCase("eighteen")) {
                    result += 18;
                }
                else if(str.equalsIgnoreCase("nineteen")) {
                    result += 19;
                }
                else if(str.equalsIgnoreCase("twenty")) {
                    result += 20;
                }
                else if(str.equalsIgnoreCase("thirty")) {
                    result += 30;
                }
                else if(str.equalsIgnoreCase("forty")) {
                    result += 40;
                }
                else if(str.equalsIgnoreCase("fifty")) {
                    result += 50;
                }
                else if(str.equalsIgnoreCase("sixty")) {
                    result += 60;
                }
                else if(str.equalsIgnoreCase("seventy")) {
                    result += 70;
                }
                else if(str.equalsIgnoreCase("eighty")) {
                    result += 80;
                }
                else if(str.equalsIgnoreCase("ninety")) {
                    result += 90;
                }
                else if(str.equalsIgnoreCase("hundred")) {
                    result *= 100;
                }
                else if(str.equalsIgnoreCase("thousand")) {
                    result *= 1000;
                    finalResult += result;
                    result=0;
                }
                else if(str.equalsIgnoreCase("million")) {
                    result *= 1000000;
                    finalResult += result;
                    result=0;
                }
                else if(str.equalsIgnoreCase("billion")) {
                    result *= 1000000000;
                    finalResult += result;
                    result=0;
                }
                else if(str.equalsIgnoreCase("trillion")) {
                    result *= 1000000000000L;
                    finalResult += result;
                    result=0;
                }
            }

            finalResult += result;
            result=0;
            System.out.println(finalResult);
        }
    }

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