/// <summary>
/// Return the sum of a series of really big numbers
/// </summary>
/// <param name="numbers">the numbers</param>
/// <returns>the sum</returns>
public static ReallyBigInt SeriesSum(List <ReallyBigInt> numbers)
{
ReallyBigInt result = new ReallyBigInt("0");
foreach (ReallyBigInt number in numbers)
{
result = result.Addition(number);
}
return(result);
}
/// <summary>
/// Raise a ReallyBitInt to a power
/// </summary>
/// <param name="exponent"></param>
/// <returns></returns>
public ReallyBigInt Power(ReallyBigInt exponent)
{
ReallyBigInt one = new ReallyBigInt("1");
ReallyBigInt result = one;
for (ReallyBigInt index = one; index.LessThanOrEqual(exponent); index = index.Addition(one))
{
result = result.Multiplication(this);
}
return(result);
}
/// <summary>
/// Multiply two REallyBigInts
/// </summary>
/// <param name="number">A number</param>
/// <returns>The product</returns>
public ReallyBigInt Multiplication(ReallyBigInt number)
{
ReallyBigInt product = new ReallyBigInt("0");
for (int index = 0; index < number.value.Length; index++)
{
int digit = int.Parse(number.value.Substring(number.value.Length - index - 1, 1));
ReallyBigInt workNumber = new ReallyBigInt("0");
for (int loop = 0; loop < digit; loop++)
{
workNumber = workNumber.Addition(this);
}
workNumber.value = workNumber.value + Zeros(index);
product = product.Addition(workNumber);
}
return(product);
}
/// <summary>
/// Calculate x to the power y
/// </summary>
/// <param name="number">The number</param>
/// <param name="exponent">The exponent</param>
/// <returns>The answer</returns>
public static ReallyBigInt Power(ReallyBigInt number, ReallyBigInt exponent)
{
if (exponent.value.Equals("0"))
{
return(new ReallyBigInt("1"));
}
if (exponent.value.Equals("1"))
{
return(number);
}
ReallyBigInt result = number;
for (ReallyBigInt index = new ReallyBigInt("2"); index.LessThanOrEqual(exponent); index = index.Addition(new ReallyBigInt("1")))
{
result = result.Multiplication(number);
}
return(result);
}
