public void Abs(Integer value, Integer expected)
{
using (Immutability.Guard(value))
{
var actual = value.Abs();
Assert.Equal(expected, actual);
}
}
/// <summary>
///
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <returns>a < b: - 1; a == b: 0; a > b: == 1</b></returns>
public static int Compare(Integer a, Integer b)
{
int i = Natural.Compare(a.Abs(), b.Abs());
if (i == 0 && a.IsZero())
{
return(0);
}
return((a.Positive ? 1 : -1) * (a.Positive != b.Positive ? 1 : i));
}
public static Integer Power(Integer b, Natural e) => new Integer()
{
natural = Natural.Power(b.Abs(), e), Positive = b.Positive ? true : (e & 1) == 0
};