/// <summary>
/// Computes PI.
/// </summary>
/// <param name="decimalPrecision">The decimal precision.</param>
/// <returns></returns>
private static string ComputePi(int decimalPrecision)
{
var x = new SuperDecimal(0, decimalPrecision);
var y = new SuperDecimal(0, decimalPrecision);
x = x.ArcTan(16, 5);
y = y.ArcTan(4, 239);
x = x - y;
return(x.ToString());
}
/// <summary>
/// Assigns the value.
/// </summary>
/// <param name="value">The value.</param>
/// <exception cref="Exception">SuperDecimal numbers provided cannot operate together.</exception>
public void AssignValue(SuperDecimal value)
{
if (!IsValidForOperators(value))
{
throw new Exception("SuperDecimal numbers provided cannot operate together.");
}
for (int i = 0; i < _arraySize; i++)
{
_superDecimal[i] = value.Array[i];
}
}
/// <summary>
/// Determines whether a SuperDecimal can apply operations against another.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>
/// <c>true</c> if [is valid for operators] [the specified value]; otherwise, <c>false</c>.
/// </returns>
public bool IsValidForOperators(SuperDecimal value)
{
// Cannot operate with itself
if (Object.ReferenceEquals(this, value))
{
return(false);
}
// Have to be the same size
if (value.DecimalCount != _decimalCount)
{
return(false);
}
return(true);
}
/// <summary>
/// Compute the arc tangent result.
/// </summary>
/// <param name="multiplicand">The multiplicand.</param>
/// <param name="reciprocal">The reciprocal.</param>
public SuperDecimal ArcTan(UInt32 multiplicand, UInt32 reciprocal)
{
SuperDecimal result = new SuperDecimal(0, _decimalCount);
SuperDecimal X = new SuperDecimal(multiplicand, _decimalCount);
X = X / reciprocal;
reciprocal *= reciprocal;
result.AssignValue(X);
SuperDecimal term = new SuperDecimal(0, _decimalCount);
UInt32 divisor = 1;
bool subtractTerm = true;
while (true)
{
X = X / reciprocal;
term.AssignValue(X);
divisor += 2;
term = term / divisor;
if (term.IsZero())
{
break;
}
if (subtractTerm)
{
result = result - term;
}
else
{
result = result + term;
}
subtractTerm = !subtractTerm;
}
return(result);
}
public override string ToString()
{
SuperDecimal temp = new SuperDecimal(0, _decimalCount);
temp.AssignValue(this);
StringBuilder sb = new StringBuilder();
sb.Append(temp.Array[0]);
sb.Append(System.Globalization.CultureInfo.CurrentCulture.NumberFormat.CurrencyDecimalSeparator);
int digitCount = 0;
while (digitCount < _decimalCount)
{
temp.Array[0] = 0;
temp = temp * 100000;
sb.AppendFormat("{0:D5}", temp.Array[0]);
digitCount += 5;
}
return(sb.ToString());
}
