static string ZeroToTwentyToChar(int ten, int unity)
{
if (ten == 0)
{
return(FrenchNumbers.UnityToChar(unity));
}
if (ten == 1)
{
if (unity > 6)
{
return($"dix-{FrenchNumbers.UnityToChar(unity)}");
}
return(FrenchNumbers.TenToFifteenToChar(unity));
}
return(null);
}
static string TenUnityToChar(int ten, int unity)
{
if (unity == 0 && ten == 0)
{
return(string.Empty);
}
string result = ZeroToTwentyToChar(ten, unity);
if (!string.IsNullOrEmpty(result))
{
return(result);
}
if (unity == 1)
{
if (unity == 7)
{
return($"{FrenchNumbers.TenToChar(ten)} et {ZeroToTwentyToChar(ten, unity)}");
}
if (unity > 7)
{
return($"{FrenchNumbers.TenToChar(ten)}-{ZeroToTwentyToChar(ten, unity)}");
}
return($"{FrenchNumbers.TenToChar(ten)} et un");
}
if (unity == 0)
{
return(FrenchNumbers.TenToChar(ten));
}
if (ten > 6)
{
return($"{FrenchNumbers.TenToChar(ten - (ten % 2 == 0 ? 0 : 1))}-{ZeroToTwentyToChar(ten % 2 == 0 ? 0 : 1, unity)}");
}
return($"{FrenchNumbers.TenToChar(ten)}-{FrenchNumbers.UnityToChar(unity)}");
}
static string ToChar(int number)
{
string numberStr = number.Reverse();
string numberChar = string.Empty;
if (numberStr.Length == 1)
{
return(FrenchNumbers.UnityToChar(number));
}
for (int i = 0; i < numberStr.Length; i++)
{
if ((i + 1) % 2 == 0)
{
int unity = numberStr.ElementAt(i - 1).ToInt();
int ten = numberStr.ElementAt(i).ToInt();
numberChar = TenUnityToChar(ten, unity) + numberChar;
}
if ((i + 1) % 3 == 0)
{
int hundred = int.Parse(new string(new[] { numberStr.ElementAt(i) }));
if (hundred == 1)
{
numberChar = "cent" + (string.IsNullOrEmpty(numberChar) ? numberChar : $" {numberChar}");
}
else
{
numberChar = $"{FrenchNumbers.UnityToChar(hundred)}-cent" + (string.IsNullOrEmpty(numberChar) ? numberChar : $"-{numberChar}");
}
}
}
return(numberChar);
}