public static BigNumber Parse(string s)
{
if (string.IsNullOrEmpty(s))
{
throw new InvalidDataException("String is null or empty");
}
var array = s.Split('/');
if (array.Length > 2)
{
throw new InvalidDataException("Fraction is not valid, to many '/' characters");
}
if (array.Length == 0)
{
throw new InvalidDataException("Invalid fraction");
}
BigNumber a;
if (array[0].Contains("."))
{
double d;
if (!double.TryParse(array[0], out d))
{
throw new InvalidDataException("Numerator is not a valid number");
}
a = new BigNumber(d);
}
else
{
BigInteger bigInt;
if (!BigInteger.TryParse(array[0], out bigInt))
{
throw new InvalidDataException("Numerator is not a valid number");
}
a = new BigNumber(bigInt);
}
if (array.Length == 1)
{
return(a);
}
BigNumber b;
if (array[1].Contains("."))
{
double d;
if (!double.TryParse(array[1], out d))
{
throw new InvalidDataException("Numerator is not a valid number");
}
b = new BigNumber(d);
}
else
{
BigInteger bigInt;
if (!BigInteger.TryParse(array[1], out bigInt))
{
throw new InvalidDataException("Numerator is not a valid number");
}
b = new BigNumber(bigInt);
}
return(a / b);
}
public BigNumber Subtract(BigNumber other)
{
return(Add(other.AdditiveInverse));
}