public static decimal Log(this decimal value)
{
if (value.IsNaN())
{
return(Decimals.NaN);
}
return(DecimalEx.Log(value));
}
public void LogarithmCalculation()
{
Console.WriteLine("Enter your number.");
LogNumber = decimal.Parse(Console.ReadLine());
Console.WriteLine("Enter your base number.");
BaseNumber = decimal.Parse(Console.ReadLine());
CalculatedLog = DecimalEx.Log(LogNumber) / DecimalEx.Log(BaseNumber);
Console.WriteLine($"Your answer is {CalculatedLog}.");
}
private void CalculateDewPoint()
{
var relativeHumidity = Humidity;
var temperatureInF = Temperature;
var temperatureInC = (temperatureInF - 32.0m) * 5.0m / 9.0m;
var vaporPressure = relativeHumidity * 0.01m * 6.112m * DecimalEx.Exp(17.62m * temperatureInC / (temperatureInC + 243.12m));
var numerator = 243.12m * DecimalEx.Log(vaporPressure) - 440.1m;
var denominator = 19.43m - DecimalEx.Log(vaporPressure);
var dewPointInC = numerator / denominator;
DewPoint = dewPointInC * 9.0m / 5.0m + 32.0m;
}
public void RejectZeroValue()
{
Assert.Throws <OverflowException>(() => DecimalEx.Log(0));
}
public void RejectNegativeValue()
{
Assert.Throws <ArgumentException>(() => DecimalEx.Log(-1));
}
public void Test(decimal value, decimal expected, decimal tolerance)
{
tolerance = Helper.GetScaledTolerance(expected, (int)tolerance, true);
Assert.That(DecimalEx.Log(value), Is.EqualTo(expected).Within(tolerance));
}
public void LogBaseRejectZeroValue()
{
Assert.Throws <OverflowException>(() => DecimalEx.Log(0, 10));
Assert.Throws <OverflowException>(() => DecimalEx.Log(10, 0));
}
public void LogBaseRejectNegativeValue()
{
Assert.Throws <ArgumentException>(() => DecimalEx.Log(-1, 10));
Assert.Throws <ArgumentException>(() => DecimalEx.Log(10, -1));
}
public void LogBaseRejectBaseOf1()
{
Assert.Throws <InvalidOperationException>(() => DecimalEx.Log(1234, 1));
}
