public void Go()
{
var stopwatch = Stopwatch.StartNew();
HighPrecision.Precision = _dp;
HighPrecision first = 4 * Atan.Calculate(5);
HighPrecision second = Atan.Calculate(239);
var pi = 4 * (first - second);
stopwatch.Stop();
WriteLine($"I calculated Pi to {_dp} decimal places in {stopwatch.ElapsedMilliseconds}ms. The last digit is {pi.ToString().Last()}.");
}
public IActionResult Index(int?dp = 6)
{
var stopwatch = Stopwatch.StartNew();
HighPrecision.Precision = dp.Value;
HighPrecision first = 4 * Atan.Calculate(5);
HighPrecision second = Atan.Calculate(239);
var pi = 4 * (first - second);
var model = new PiModel
{
DecimalPlaces = dp.Value,
Value = pi.ToString(),
ComputeMilliseconds = stopwatch.ElapsedMilliseconds,
ComputeHost = Environment.MachineName
};
return(View(model));
}
public static HighPrecision Calculate(int denominator)
{
HighPrecision result = new HighPrecision(1, denominator);
int xSquared = denominator * denominator;
int divisor = 1;
HighPrecision term = result;
while (!term.IsZero)
{
divisor += 2;
term /= xSquared;
result -= term / divisor;
divisor += 2;
term /= xSquared;
result += term / divisor;
}
return(result);
}
