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Applies to: ~>0.1
class operator Subtract(const A, B: TFraction): TFraction;
This operator overload permits one TFraction to be subtracted from another using the
The result of the subtraction is returned as a new TFraction instance, reduced to its lowest terms.
One of the operands may be either an integer or floating point value. The Implicit operator takes care of converting the integer and floating point operands to a TFraction before performing the subtraction.
var F1, F2, FRes: TFraction; begin F1 := TFraction.Create(2, 3); F2 := TFraction.Create(5, 6); FRes := F1 - F2; // 2/3 - 5/6 = 4/6 - 5/6 = -1/6 Assert((FRes.Numerator = -1) and (FRes.Denominator = 6)); F2 := TFraction.Create(-5, 6); FRes := 1 - F2; // 1 - -5/6 = 6/6 - -5/6 = 11/6 Assert((FRes.Numerator = 11) and (FRes.Denominator = 6)); F1 := TFraction.Create(3, 4); FRes := F1 - 0.25; // 3/4 - 0.25 = 3/4 - 1/4 = 2/4 = 1/2 Assert((FRes.Numerator = 1) and (FRes.Denominator = 2)); end;