public static Fraction[] GetRandomPairs(int quantity, int maxDenom, bool includeZero, bool includeTotal)
{
List<Fraction> result = new List<Fraction>();
Randomizer denominators = Randomizer.New(maxDenom, 3).ExcludeNumbers(new List<int> {7, 11});
while(result.Count < quantity * 2) {
int denominator = denominators.Next();
Randomizer numerators = Randomizer.New(includeTotal ? denominator : (denominator - 1), includeZero ? 0 : 1, false);
bool roundDone = false;
while(!roundDone && numerators.HasNext()){
int numerator = numerators.Next();
Fraction f = new Fraction(numerator, denominator);
Fraction eq = new Fraction(f.Numerator, f.Denominator).RandomEquivalent(maxDenom);
if(!f.LiteralEquals(eq) && !result.Contains(f)){
result.Add(f);
result.Add(eq);
roundDone = true;
}
}
}
return result.ToArray();
}
