public static KeyValuePair <int, int> RationalRatio(double x)
{
for (int val = 2; val < RATIO_MAX; val++)
{
// Do we acquire an integer?
if (Utilities.CompareValues(x * val, Math.Floor(x * val)))
{
int gcd = Utilities.GCD(val, (int)Math.Round(x * val));
return(x < 1 ? new KeyValuePair <int, int>(val / gcd, (int)Math.Round(x * val) / gcd) :
new KeyValuePair <int, int>((int)Math.Round(x * val) / gcd, val / gcd));
}
}
return(new KeyValuePair <int, int>(-1, -1));
}
public static KeyValuePair <int, int> RationalRatio(double x, double y)
{
for (int numer = 2; numer < RATIO_MAX; numer++)
{
for (int denom = 1; denom < RATIO_MAX; denom++)
{
if (numer != denom)
{
if (Utilities.CompareValues(x / y, (double)(numer) / denom))
{
int gcd = GCD(numer, denom);
return(numer > denom ? new KeyValuePair <int, int>(numer / gcd, denom / gcd)
: new KeyValuePair <int, int>(denom / gcd, numer / gcd));
}
}
}
}
return(new KeyValuePair <int, int>(-1, -1));
}
public static bool IsInteger(double x)
{
return(Utilities.CompareValues(x, (int)x));
}
// -1 is an error
public static int IntegerRatio(double x, double y)
{
return(Utilities.CompareValues(x / y, Math.Floor(x / y)) ? (int)Math.Floor(x / y) : -1);
}
