/// <summary>
/// Phân số tối giản.
/// </summary>
public void Minimalism()
{
BigDecimal n = Minimalism(this.Numerator, this.Denominator);
Numerator = Numerator.Divide(n.Abs());
Denominator = Denominator.SetScale(5, RoundingMode.HalfEven);
Denominator = Denominator.Divide(n.Abs());
}
public BigInteger Ceiling()
{
if (Denominator.CompareTo(BigInteger.One) == 0)
{
return(Numerator);
}
if (Numerator.CompareTo(BigInteger.Zero) > 0)
{
return(Numerator.Divide(Denominator).Add(BigInteger.One));
}
return(Numerator.Divide(Denominator));
}
public BigInteger Floor()
{
/* is already integer: return the numerator
*/
if (Denominator.CompareTo(BigInteger.One) == 0)
{
return(Numerator);
}
if (Numerator.CompareTo(BigInteger.Zero) > 0)
{
return(Numerator.Divide(Denominator));
}
return(Numerator.Divide(Denominator).Subtract(BigInteger.One));
}
private void Normalize()
{
// compute greatest common divisor of numerator and denominator
BigInteger g = Numerator.Gcd(Denominator);
if (g.CompareTo(BigInteger.One) > 0)
{
Numerator = Numerator.Divide(g);
Denominator = Denominator.Divide(g);
}
if (Denominator.CompareTo(BigInteger.Zero) == -1)
{
Numerator = Numerator.Negate();
Denominator = Denominator.Negate();
}
}
public BigInteger Truncate()
{
return(Denominator.CompareTo(BigInteger.One) == 0 ? Numerator : Numerator.Divide(Denominator));
}