public static double ToFloat(this Fraction_class fraction)
{
if (fraction.numerator == 0 || fraction.denominator == 0)
return (double)fraction.wholeNumber;
else
return (double)fraction.wholeNumber + (double)fraction.numerator / fraction.denominator;
}
// Reduce fraction by GCD. Called after all math, and before display.
public static void Reduce(this Fraction_class fraction)
{
if (fraction.wholeNumber==0 && (fraction.numerator == 0 ||fraction.denominator == 0)) return;
if (fraction.denominator == 1 )
{
fraction.wholeNumber += fraction.numerator;
fraction.numerator = 0;
fraction.denominator = 0;
return;
}
if (fraction.numerator < 0 || fraction.wholeNumber < 0)
{
fraction.fractionSign = Sign.negative;
fraction.numerator *= -1;
}
if( fraction.denominator !=0 && fraction.denominator <= fraction.numerator)
{
fraction.wholeNumber += fraction.numerator / fraction.denominator;
fraction.numerator %= fraction.denominator;
if (fraction.numerator == 0) fraction.denominator = 0;
}
int GCD = 0;
for (int nextN=fraction.numerator;nextN>1;--nextN)
{
if (fraction.numerator % nextN == 0 &&
fraction.denominator % nextN ==0 )
{
GCD = nextN;
break;
}
}
if (GCD !=0)
{
fraction.numerator /= GCD;
fraction.denominator /= GCD;
}
if (fraction.denominator == 1)
{
fraction.wholeNumber += fraction.numerator;
fraction.numerator = 0;
fraction.denominator = 0;
return;
}
if (fraction.fractionSign == Sign.negative)
{
fraction.numerator *= -1;
fraction.denominator *= -1;
fraction.wholeNumber *= -1;
}
}
public static string ToDisplayFloat(this Fraction_class fract, string zeroOpt="0")
{
string s = fract.ToFloat().ToString();
if (s == "0")
return zeroOpt;
return fract.ToFloat().ToString();
}
// ToSimpleFraction adds the whole number to the fraction numerator for additive use.
public static void ToSimpleFraction(this Fraction_class fraction)
{
if (fraction.numerator == 0)
{
fraction.numerator = fraction.wholeNumber;
fraction.denominator = 1;
fraction.wholeNumber = 0;
}
else
{
fraction.numerator += fraction.wholeNumber * fraction.denominator;
fraction.wholeNumber = 0;
}
}
public void testableSubTest()
{
Fraction_class Accumulator = new Fraction_class();
Fraction_class InBound = new Fraction_class();
Accumulator.Parse("100 1/2");
InBound.Parse("50 1/4");
Accumulator.Subtract(InBound);
Assert.IsTrue(Accumulator.ToDisplayFraction() == "50 1/4");
Accumulator.Subtract(InBound);
Assert.IsTrue(Accumulator.ToDisplayFraction() == "0");
}
public static string ToDisplayFraction(this Fraction_class fraction, string zeroOpt = "0")
{
fraction.Reduce();
if (fraction.denominator==0 || fraction.numerator == 0)
{
if (fraction.wholeNumber == 0)
return zeroOpt;
else
return $"{fraction.wholeNumber}";
}
else
{
if (fraction.wholeNumber == 0)
return $"{fraction.numerator}/{fraction.denominator}";
else
return $"{fraction.wholeNumber} { fraction.numerator}/{ fraction.denominator}";
}
}
