string getRomanDigitPreview(int number)
{
RomansCatalog catalog = RomansCatalog.GetInstance();
Roman[] romans = catalog.GetAll();
Roman previous = null;
foreach (Roman n in romans)
{
if (number == n)
{
return(n.Letter);
}
else
if (number > n)
{
previous = n;
}
else
{
break;
}
}
return(previous.Letter + getRomanDigitPreview(number - previous.Value));
}
public int ConvertToNumber(string roman)
{
string start = "";
string result = roman;
while (start != result)
{
start = result;
foreach (ReplacementPattern r in ReplacementPatternCatalog.GetInstance().GetAll())
{
result = r.ReverseReplace(result);
}
}
int number = 0;
foreach (char c in result)
{
number += RomansCatalog.GetInstance().GetOne(c).Value;
}
return(number);
}
