將小數轉換爲文本

Question

我試圖將數字轉換爲文本，並且此代碼給了我一個變量的錯誤。

只是在第三個變量的末尾，它給了我一個「預期」的錯誤。

代碼中發生了什麼？

public static string NumberToWords(double doubleNumber) 
    { 
     var beforeFloatingPoint = (int)Math.Floor(doubleNumber); 
     var beforeFloatingPointWord = "{NumberToWords(beforeFloatingPoint)} Rupees"; 
     var afterFloatingPointWord = "{SmallNumberToWord((int) ((doubleNumber - beforeFloatingPoint) * 100),"")} cents"; 
     return "{beforeFloatingPointWord} and {afterFloatingPointWord}"; 
    } 

該錯誤正好在下面一行的末尾。

var afterFloatingPointWord = "{SmallNumberToWord((int) ((doubleNumber - beforeFloatingPoint) * 100),"")} cents"; 

完整的代碼下面，現在當我運行代碼我得到一個錯誤說輸入字符串的不正確的格式（在按鈕單擊事件）。它工作不帶小數。但用小數，它給了我這個錯誤。我正在發佈下面的完整代碼。

如果有人可以幫助我得到這個工作，請。

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 

namespace CheckPrintingSystem 
{ 
    public partial class Form1 : Form 
    { 
     public Form1() 
     { 
      InitializeComponent(); 
     } 

     public static string NumberToWords(double doubleNumber) 
     { 
      var beforeFloatingPoint = (int)Math.Floor(doubleNumber); 
      var beforeFloatingPointWord = string.Format("NumberToWords(beforeFloatingPoint)} Rupees"); 
      var afterFloatingPointWord = string.Format(@"{SmallNumberToWord((int) ((doubleNumber - beforeFloatingPoint) * 100),"")} cents"); 
      return "{beforeFloatingPointWord} and {afterFloatingPointWord}"; 
     } 

     private static string NumberToWords(int number) 
     { 


      if (number == 0) return "zero"; 

      if (number < 0) return "minus" + NumberToWords(Math.Abs(number)); 

      string words = ""; 

      if((number/1000000) > 0) 
      { 
       words += NumberToWords(number/1000000) + "million "; 
       number %= 1000000; 
      } 

      if((number/1000) > 0) 
      { 
       words += NumberToWords(number/1000) + "thousand "; 
       number %= 1000; 
      } 

      if ((number/100) > 0) 
      { 
       words += NumberToWords(number/100) + "hundred "; 
       number %= 100; 
      } 

      words = SmallNumberToWord(number,words); 
      return words; 

     } 

     private static string SmallNumberToWord(int number, string words) 

     { 
      if (number <= 0) return words; 
      if (words != "") words += "and "; 

       var unitsMap = new[] { "zero ", "one ", "two ", "three ", "four ", "five ", "six ", "seven ", "eight ", "nine ", "ten ", "eleven ", "twelve ", "thirteen ", "fourteen ", "fifteen ", "sixteen ", "seventeen ", "eighteen ", "nineteen "}; 
       var tensMap = new[] { "zero ", "ten ", "twenty ", "thirty ", "fourty ", "fifty ", "sixty ", "seventy ", "eighty ", "ninety " }; 
       if (number < 20) words += unitsMap[number]; 
       else 
       { 
        words += tensMap[number/10]; 

        if ((number % 10) > 0) words += " " + unitsMap[number % 10]; 
       } 
       return words; 

     } 



     private void button1_Click(object sender, EventArgs e) 
     { 
      textBox2.Text = NumberToWords(Convert.ToInt32(textBox1.Text)); 
     } 
    } 
} 

Answer 1

要糾正錯誤，您必須爲空字符串使用單引號。

因此，代碼必須是：

var afterFloatingPointWord = "{SmallNumberToWord((int) ((doubleNumber 
- beforeFloatingPoint) * 100),'')} cents"; 

這是因爲在第二個雙引號括起來的，預計將關閉。

要使代碼的其餘部分工作，您將不得不更改一些代碼。

public static string NumberToWords(double doubleNumber) 
{ 
    var beforeFloatingPoint = (int)Math.Floor(doubleNumber); 
    var beforeFloatingPointWord = NumberToWords(beforeFloatingPoint) + " Rupees"; 
    var afterFloatingPointWord = SmallNumberToWord((int)((doubleNumber - beforeFloatingPoint) * 100), string.Empty) + " cents"; 
    return beforeFloatingPointWord + " and " + afterFloatingPointWord; 
}