紧急求助C#面试题，各位大虾帮帮我
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悬赏园豆：30
[已解决问题]
解决于 2018-06-01 06:19
要用c#写一个web application.包括unit test, 把数字转换为英语单词的货币表示
比如：
130423.05 =〉One Hundred and Thirty Thousand Four Hundred and Twenty Three Dollars and Five Gents
1000010000.15 => One Billion Ten Thousand Dollars and Fifteen cents
1.151 => One Dollar and Fifteen cents
非常紧急，还望园子内有经验的大虾帮帮我，非常感谢了
最佳答案
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public class Number2English
{
private readonly string[] StrNO = new string[19];//1-19的英文
private readonly string[] StrTens = new string[9];//整十英文
private readonly string[] Unit = new string[9];//英文单位
public string TranslateDollars(double dollars)
{
string Str, BeforePoint, AfterPoint, temp;
int Bit; //单位的个数
string CurString;//当前字符串
int NumLen;
Init();
Str = (Math.Round(dollars, 2).ToString("#0.00"));//取两位有效数字
if (Str.IndexOf(".") == -1)
{
BeforePoint = Str;
AfterPoint = "";
}
else
{
BeforePoint = Str.Substring(0, Str.IndexOf("."));
AfterPoint = Str.Substring(Str.IndexOf(".") + 1, Str.Length - Str.IndexOf(".") - 1);
}
//处理整数部分
if (BeforePoint.Length > 12)
{
return null;
}
Str = "";
if (dollars >= 1)//整数部分不为0
{
while (BeforePoint.Length > 0)
{
NumLen = Len(BeforePoint);
if (NumLen % 3 == 0)
{
CurString = Left(BeforePoint, 3);
BeforePoint = Right(BeforePoint, NumLen - 3);
}
else
{
CurString = Left(BeforePoint, (NumLen % 3));
BeforePoint = Right(BeforePoint, NumLen - (NumLen % 3));
}
Bit = Len(BeforePoint) / 3;
temp = DecodeHundred(CurString);
if (Bit == 0 && Len(CurString) == 3)
{
if (Convert.ToInt32(Left(CurString, 1)) != 0 & Convert.ToInt32(Right(CurString, 2)) != 0)
{
temp = Left(temp, temp.IndexOf(Unit[3]) + Len(Unit[3])) + Unit[7] + " " +
Right(temp, Len(temp) - (temp.IndexOf(Unit[3]) + Len(Unit[3])));
}
else
{
temp = Unit[7] + " " + temp;
}
}
if (Bit == 0)
{
Str = Convert.ToString(Str + " " + temp).Trim();
}
else
{
if (temp != "")
{
Str = Convert.ToString(Str + " " + temp + " " + Unit[Bit - 1]).Trim();
}
}
if (Left(Str, 3) == Unit[7])
{
Str = Convert.ToString(Right(Str, Len(Str) - 3)).Trim();
}
if (BeforePoint == Len(BeforePoint).ToString())
{
return "";
}
}
BeforePoint = Str+" ";
}
else//整数部分为0
{
BeforePoint = "";
}
// 处理小数部分
if ((dollars *100)%100 > 0)//如果存在小数
{
if (DecodeHundred(AfterPoint) =="One")
{
if (Convert.ToUInt64(dollars) == 1)
{
AfterPoint = Unit[8] + " And " + DecodeHundred(AfterPoint) + " " + Unit[6];//单数
}
else if (Convert.ToUInt64(dollars) == 0)
{
AfterPoint = DecodeHundred(AfterPoint) + " And " + Unit[6];//单数
}
else
{
AfterPoint = Unit[5] + " And " + DecodeHundred(AfterPoint) + " " + Unit[6];//单数
}
}
else
{
if (Convert.ToUInt64(dollars) == 1)
{
AfterPoint = Unit[8] + " And " + DecodeHundred(AfterPoint) + " " + Unit[6] + "s";//复数
}
else if (Convert.ToUInt64(dollars) == 0)
{
AfterPoint = DecodeHundred(AfterPoint) + " " + Unit[6] + "s";//复数
}
else
{
AfterPoint = Unit[5] + " And " + DecodeHundred(AfterPoint) + " " + Unit[6] + "s";//复数
}
}
}
else//如果不存在小数
{
if (Convert.ToUInt64(dollars) == 1)
{
AfterPoint = Unit[8];
}
else
{
AfterPoint = Unit[5];
}
}
return (BeforePoint + AfterPoint);
}
private void Init()
{
if (StrNO[0] != "One")
{
StrNO[0] = "One";
StrNO[1] = "Two";
StrNO[2] = "Three";
StrNO[3] = "Four";
StrNO[4] = "Five";
StrNO[5] = "Six";
StrNO[6] = "Seven";
StrNO[7] = "Eight";
StrNO[8] = "Nine";
StrNO[9] = "Ten";
StrNO[10] = "Eleven";
StrNO[11] = "Twelve";
StrNO[12] = "Thirteen";
StrNO[13] = "Fourteen";
StrNO[14] = "Fifteen";
StrNO[15] = "Sixteen";
StrNO[16] = "Seventeen";
StrNO[17] = "Eighteen";
StrNO[18] = "Nineteen";
StrTens[0] = "Ten";
StrTens[1] = "Twenty";
StrTens[2] = "Thirty";
StrTens[3] = "Forty";
StrTens[4] = "Fifty";
StrTens[5] = "Sixty";
StrTens[6] = "Seventy";
StrTens[7] = "Eighty";
StrTens[8] = "Ninety";
Unit[0] = "Thousand";
Unit[1] = "Million";
Unit[2] = "Billion";
Unit[3] = "Hundred";
Unit[4] = "Only";
Unit[5] = "Dollars";
Unit[6] = "Cent";
Unit[7] = "";
Unit[8] = "Dollar";
}
}
private string DecodeHundred(string HundredString)
{
int temp;
string rtn = "";
if (Len(HundredString) > 0 && Len(HundredString) <= 3)
{
switch (Len(HundredString))
{
case 1:
temp = Convert.ToInt32(HundredString);
if (temp != 0)
{
rtn = StrNO[temp - 1];
}
break;
case 2:
temp = Convert.ToInt32(HundredString);
if (temp != 0)
{
if ((temp < 20))
{
rtn = StrNO[temp - 1];
}
else
{
if (Convert.ToUInt64(Right(HundredString, 1)) == 0)
{
rtn = StrTens[Convert.ToInt32(temp / 10) - 1];
}
else
{
rtn = Convert.ToString(StrTens[Convert.ToInt32(temp / 10) - 1] + "-" +
StrNO[Convert.ToInt32(Right(HundredString, 1)) - 1]);
}
}
}
break;
case 3:
if (Convert.ToUInt64(Left(HundredString, 1)) != 0)//百位数字不为空
{
rtn = Convert.ToString(StrNO[Convert.ToInt32(Left(HundredString, 1)) - 1] + " " + Unit[3] +
" And " + DecodeHundred(Right(HundredString, 2)));
}
else
{
if (Convert.ToUInt64(Right(HundredString, 2)) != 0)
{
rtn = "And "+DecodeHundred(Right(HundredString, 2));
}
else
{
rtn = DecodeHundred(Right(HundredString, 2));
}
}
break;
default:
break;
}
}
return rtn;
}
private string Left(string str, int n)
{
return str.Substring(0, n);
}
private string Right(string str, int n)
{
return str.Substring(str.Length - n, n);
}
private int Len(string str)
{
return str.Length;
}
}
收获园豆：20
其他回答(2)
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根据.分割，然后在各自算数字转英文，记住几个关键点就行了。
1、3位是分界点，千，百万，十亿。
2、3位中，如果百位是0，那么需要加and
3、看最后一个示例，是保留两位小数
收获园豆：10
大侠，我写了个处理整数（不包括小数）的函数如下：
1 private string TranslateDollars(string dollars) 2 { 3 4 string rtnStr = ""; 5 string newDar = dollars; 6 bool isTranslated = false; 7 bool isZeroBegin = false; 8 double darNum = Convert.ToDouble(dollars); 9 if (darNum > 0) 10 { 11 isZeroBegin = dollars.StartsWith("0"); 12 //if (isZeroBegin) 13 // newDar = TrimZeroStart(dollars); 14 int darLength = dollars.Length; 15 int numPos = 0; 16 string darName = ""; 17 switch (darLength) 18 { 19 case 1: 20 rtnStr = ConvertOneNumber(newDar); 21 isTranslated = true; 22 break; 23 case 2: 24 rtnStr = ConvertTenNumber(newDar); 25 isTranslated = true; 26 break; 27 case 3: 28 numPos = (darLength % 3) + 1; 29 30 darName = " Hundred "; 31 break; 32 case 4: 33 case 5: 34 case 6: 35 numPos = (darLength % 4) + 1; 36 37 darName = " Thousand "; 38 break; 39 case 7: 40 case 8: 41 case 9: 42 numPos = (darLength % 7) + 1; 43 44 darName = " Million "; 45 break; 46 case 10: 47 numPos = (darLength % 10) + 1; 48 49 darName = " Billion "; 50 break; 51 default: 52 isTranslated = true; 53 break; 54 55 } 56 if (!isTranslated) 57 { 58 rtnStr = TranslateDollars(newDar.Substring(0, numPos)) + darName + TranslateDollars(newDar.Substring(numPos)); 59 //if (isZeroBegin) rtnStr = " and " + rtnStr.Trim(); 60 } 61 62 if (rtnStr.Trim().Equals(darName.Trim())) rtnStr = ""; 63 64 } 65 66 return rtnStr.Trim(); 67 68 69 }
但是这个函数目前有点问题，比如
1000050 会转换为 One Million Thousand Hundred Fifty Dollars
应该是 One Million and Fifty Dollars
1000010000.15 会转换为
One Billion Million Hundred Ten Thousand Dollars and Fifteen Cents
有没有哪位大侠能帮我改改这个代码 ？
我实在是搞不定
谢谢了
@新西兰程序员:
给你一个参考，金额转人民币大写的，性质和这个差不多：https://github.com/hstarorg/Hstar.Utility/blob/master/Hstar.Utility/Helpers/RmbHelper.cs
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面试写着 有点变态
