private static Fraction Multiply(Fraction left, Fraction right)
{
if (left.IsNaN() || right.IsNaN())
{
return(NaN);
}
CrossReducePair(ref left, ref right);
try
{
checked
{
var numerator = left.Numerator * right.Numerator;
var denominator = left.Denominator * right.Denominator;
return(new Fraction(numerator, denominator));
}
}
catch (Exception)
{
//throw new FractionException("Multiply error", ex);
return(new Fraction(left.ToDouble() * right.ToDouble()));
}
}
private static Fraction Add(Fraction left, Fraction right)
{
if (left.IsNaN() || right.IsNaN())
{
return(NaN);
}
var gcd = GCD(left.Denominator, right.Denominator); // nie może zwrócić mniej niż 1
var leftDenominator = left.Denominator / gcd;
var rightDenominator = right.Denominator / gcd;
try
{
checked
{
var numerator = left.Numerator * rightDenominator + right.Numerator * leftDenominator;
var denominator = leftDenominator * rightDenominator * gcd;
return(new Fraction(numerator, denominator));
}
}
catch (Exception)
{
//throw new FractionException("Error dodawania", ex);
return(new Fraction(left.ToDouble() + right.ToDouble())); // przybliż ekstremalne przypadki
}
}
private static Fraction Modulus(Fraction left, Fraction right)
{
if (left.IsNaN() || right.IsNaN())
{
return(NaN);
}
try
{
checked
{
var quotient = (int)(left / right);
var whole = new Fraction(quotient * right.Numerator, right.Denominator);
return(left - whole);
}
}
catch (Exception)
{
//throw new FractionException("Modulus error", ex);
return(new Fraction(left.ToDouble() % right.ToDouble()));
}
}