public BigNumber Append(BigNumber number)
{
this.bigNumberValue = this.bigNumberValue + number.bigNumberValue;
return(this);
}
public static BigNumber BigSum(this IEnumerable <BigNumber> values)
{
BigNumber l = values.Aggregate((h, t) => h + t);
return(l);
}
public static BigNumber operator *(BigNumber first, BigNumber second)
{
BigNumber returnValue = 0;
BigNumber multiplacand;
BigNumber multiplier;
if (first < second)
{
multiplier = first;
multiplacand = second;
}
else
{
multiplier = second;
multiplacand = first;
}
for (int i = 0; i < multiplier.bigNumberValue.Length; i++)
{
int a = 0;
int b = 0;
if (multiplier.bigNumberValue.Length - i - 1 >= 0)
{
a = multiplier.bigNumberValue[multiplier.bigNumberValue.Length - i - 1].ConvertToInt();
}
List <char> returnString = new List <char>();
int carry = 0;
// Add 0's for the correct number of places.
for (int z = 0; z < i; z++)
{
returnString.Add('0');
}
for (int j = 0; j < multiplacand.bigNumberValue.Length; j++)
{
if (multiplacand.bigNumberValue.Length - j - 1 >= 0)
{
b = multiplacand.bigNumberValue[multiplacand.bigNumberValue.Length - j - 1].ConvertToInt();
}
int result = a * b + carry;
if (result > 9)
{
carry = result / 10;
result = result % 10;
}
else
{
carry = 0;
}
returnString.Add(result.ConvertToChar());
}
if (carry > 0)
{
returnString.Add(carry.ConvertToChar());
carry = 0;
}
returnString.Reverse();
returnValue += new BigNumber(new string(returnString.ToArray()));
}
return(returnValue);
}
