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  1. using System;
  2. using System.Linq;
  3.  
  4. public class RomanNumeral
  5. {
  6.     const int NaN = -1;
  7.     private static int ToInteger(string roman_numeral) {
  8.         string ro_num = roman_numeral.ToUpper().Trim();
  9.         char[]  ro_num_array = ro_num.ToCharArray();
  10.         if (ro_num == "N") { return 0; }
  11.  
  12.         char[] symbols = { 'I', 'V', 'X', 'L', 'C', 'D', 'M' };
  13.         int [] values = { 1, 5, 10, 50, 100, 500, 1000 };
  14.         int int_num = 0;
  15.         int symb_it = 0, symb_consec = 0;
  16.  
  17.         bool to_parse = true;
  18.         int subtrahend = 0, didgit = -1;
  19.         foreach (char ro_num_char in ro_num_array.Reverse<char>()) {
  20.             do
  21.             {
  22.                 if (ro_num_char == symbols[symb_it])
  23.                 {
  24.                     symb_consec += (symb_it%2==1)? 3:1;
  25.                     if (symb_consec > 3) {
  26.                         Console.WriteLine("symb_consec>3");return NaN; 
  27.                     }
  28.                     didgit = symb_it/2*2+2;
  29.  
  30.  
  31.                     subtrahend = ((symb_it-1)/2)*2;
  32.                     int_num += values[symb_it];
  33.                     to_parse = false;
  34.  
  35.                 } 
  36.                 else if ((ro_num_char == symbols[subtrahend]))
  37.                 {
  38.                     if (didgit == symb_it) { return NaN; }
  39.                     didgit = symb_it;
  40.                     symb_consec = 0;
  41.                     int_num -= values[subtrahend];
  42.                     to_parse = false;
  43.  
  44.                 }
  45.                 if (to_parse) {
  46.                     symb_it++;
  47.                     if (symb_it > 6) { Console.WriteLine("symb_it>6");return NaN; }
  48.                     symb_consec = 0;
  49.                 }
  50.             } while (to_parse);
  51.  
  52.             to_parse = true;
  53.         }
  54.         return int_num;
  55.     }
  56.     public static void Main()
  57.     {
  58.         string numerator_r = "LVII";
  59.         string denominator_r = "CCCLVII";
  60.         string decimal_repr_s = "2013.1589041096";
  61.  
  62.         //int test = RomanNumeral.ToInteger("MMMCMXCIX");
  63.         Console.WriteLine(
  64.             "2013/02/27 is not " +
  65.             float.Parse(decimal_repr_s) +
  66.             ". It should be 2013+(30+27)/365=" +
  67.             (2013.0+ (30.0+27.0)/365.0).ToString() +
  68.             " So that 01/01 is 2013.0\n\n" +
  69.             "The roman numeral representation should on the other hand be the other way around regarding 01/01 where it starts with an one instead of a zero:\n"+
  70.             RomanNumeral.ToInteger(numerator_r) + "=30+27. The numerator should have been LVIII (="+
  71.             RomanNumeral.ToInteger("LVII")+ ")\n\nI hope you are entertained now FELLOW HUMAN"
  72.         );
  73.  
  74.     }
  75. }
Success #stdin #stdout 0.05s 23952KB
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Standard input is empty
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2013/02/27 is not 2013.159. It should be 2013+(30+27)/365=2013.15616438356 So that 01/01 is 2013.0

The roman numeral representation should on the other hand be the other way around regarding 01/01 where it starts with an one instead of a zero:
57=30+27. The numerator should have been LVIII (=57)

I hope you are entertained now FELLOW HUMAN
https://ideone.com/9ZCywm
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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