寻找数字转英文的算法？

[mayonglong]

不知哪位大侠能够提供一个数字转成英文的算法
e.g. 202,321.17 转换如下：


TWO HUNDRED AND TWO THOUSAND THREE HUNDRED AND TWENTY ONE AND CENTS SEVENTEEN ONLY

[viena]

http://singlepine.cnblogs.com/archive/2006/02/05/325754.html

[jinjazz]

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
          string str=  new convertor().numberToEnglish(decimal.Parse("202321.17"));
        }

        class convertor
        {
            public string numberToEnglish(decimal y)
            {
                string numberStr = "";
                string lStr = "";//小数点左边字符串
                string rStr = "";//小数点右边字符串
                numberStr = (string)y.ToString();
                int dot;//小数点位置
                dot = numberStr.IndexOf(".");
                if (dot != 0 & dot != -1)//判断有没有小数
                {
                    lStr = numberStr.Substring(0, dot);//取小数点left的字串
                    if (numberStr.Substring(dot + 1, 2) == "00")
                    {
                        rStr = "";
                    }
                    else
                    {
                        rStr = numberStr.Substring(dot + 1, 2);//取小数点right的字串
                    }
                }
                else
                {
                    lStr = numberStr;//没有小数点的情况
                }
                string lStrRev;
                lStrRev = reverseString(lStr);//对左边的字串取反字串
                string[] a = new string[5];//定义5个字串变量用来存放解析出的三位一组的字串

                switch (lStrRev.Length % 3)
                {
                    case 1:
                        lStrRev = lStrRev + "00"; break;

                    case 2:
                        lStrRev = lStrRev + "0"; break;

                }
                string StrInt;//用来存放转换后的整数部分
                StrInt = "";
                for (int i = 0; i <= lStrRev.Length / 3 - 1; i++)//计算有多少个三位 
                {
                    a[i] = reverseString(lStrRev.Substring(3 * i, 3));//截取第1个三位
                    if (a[i] != "000")//用来避免这种情况“1000000=ONE MILLION THOUSAND ONLY”
                    {
                        if (i != 0)
                        {
                            StrInt = w3(a[i]) + " " + dw(i.ToString()) + " " + StrInt;//用来加上“THOUSAND OR MILLION OR BILLION” 
                        }
                        else
                        {
                            StrInt = w3(a[i]);//防止i=0时“lm=w3(a(i))+" "+dw(i)+" "+lm”多加两个尾空格
                        }
                    }
                    else
                    {
                        StrInt = w3(a[i]) + StrInt;
                    }
                }
                string StrDce;//用来存放转换后的小数部分
                StrDce = "";
                if (dot != 0 & dot != -1 & rStr != "")
                {
                    rStr = "0" + rStr;
                    StrDce = " AND POINT " + w2(rStr);
                }
                return StrInt + StrDce;
            }
            //将字符串反置
            private string reverseString(string str)
            {
                int lenInt = str.Length;
                string[] z = new string[str.Length];
                for (int i = 0; i < lenInt; i++)
                {
                    z[i] = str.Substring(i, 1);
                }
                str = "";
                for (int i = lenInt - 1; i >= 0; i--)
                {
                    str = str + z[i];
                }
                return str;
            }
            private string zr4(string y)
            {
                string[] z = new string[10];
                z[1] = "ONE";
                z[2] = "TWO";
                z[3] = "THREE";
                z[4] = "FOUR";
                z[5] = "FIVE";
                z[6] = "SIX";
                z[7] = "SEVEN";
                z[8] = "EIGHT";
                z[9] = "NINE";
                return z[Int32.Parse(y.Substring(0, 1))];
            }
            private string zr3(string y)
            {
                string[] z = new string[10];
                z[1] = "ONE";
                z[2] = "TWO";
                z[3] = "THREE";
                z[4] = "FOUR";
                z[5] = "FIVE";
                z[6] = "SIX";
                z[7] = "SEVEN";
                z[8] = "EIGHT";
                z[9] = "NINE";
                return z[Int32.Parse(y.Substring(2, 1))];
            }
            private string zr2(string y)
            {
                string[] z = new string[20];
                z[10] = "TEN";
                z[11] = "ELEVEN";
                z[12] = "TWELVE";
                z[13] = "THIRTEEN";
                z[14] = "FOURTEEN";
                z[15] = "FIFTEEN";
                z[16] = "SIXTEEN";
                z[17] = "SEVENTEEN";
                z[18] = "EIGHTEEN";
                z[19] = "NINETEEN";
                return z[Int32.Parse(y.Substring(1, 2))];
            }
            private string zr1(string y)
            {
                string[] z = new string[10];
                z[1] = "TEN";
                z[2] = "TWENTY";
                z[3] = "THIRTY";
                z[4] = "FORTY";
                z[5] = "FIFTY";
                z[6] = "SIXTY";
                z[7] = "SEVENTY";
                z[8] = "EIGHTY";
                z[9] = "NINETY";
                return z[Int32.Parse(y.Substring(1, 1))];
            }
            private string dw(string y)
            {
                string[] z = new string[5];
                z[0] = "";
                z[1] = "THOUSAND";
                z[2] = "MILLION";
                z[3] = "BILLION";
                return z[Int32.Parse(y)];
            }
            //用来制作2位数字转英文 
            private string w2(string y)
            {
                string tempstr;
                if (y.Substring(1, 1) == "0")//判断是否小于十
                    tempstr = zr3(y);
                else
                    if (y.Substring(1, 1) == "1")//判断是否在十到二十之间
                        tempstr = zr2(y);
                    else
                    {
                        if (y.Substring(2, 1) == "0")//判断是否为大于二十小于一百的能被十整除的数（为了去掉尾空格）
                        {
                            tempstr = zr1(y);
                        }
                        else
                        {
                            tempstr = zr1(y) + " " + zr3(y);
                        }
                    }
                return tempstr;
            }
            private string w3(string y)
            {
                string tempstr;
                if (y.Substring(0, 1) == "0")//判断是否小于一百 
                    tempstr = w2(y);
                else
                {
                    if (y.Substring(1, 2) == "00")//判断是否能被一百整除
                    {
                        tempstr = zr4(y) + " " + "HUNDRED";
                    }
                    else
                    {
                        tempstr = zr4(y) + " " + "HUNDRED" + " " + "AND" + " " + w2(y);//不能整除的要后面加“AND” 
                    }
                }
                return tempstr;
            }
        }
    }
     
}

[mm6268]

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[烈火焚身]

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[csShooter]

[Quote=引用 1 楼 viena 的回复:]
http://singlepine.cnblogs.com/archive/2006/02/05/325754.html
[/Quote]