Using round function I implemented the RoundTo function as in Delphi:
type
TRoundToRange = -37..37;
function RoundTo(const AValue: Double; const ADigit: TRoundToRange): Double;
var
LFactor: Double;
begin
LFactor := IntPower(10, ADigit);
Result := Round(AValue / LFactor) * LFactor;
end;
In Delphi RoundTo has a known bug
(http://qc.borland.com/wc/qcmain.aspx?d=8070).
And in freepascal (Windows) I noticed the same behavior.
In order to respect the banker's rounding we must obtain:
RoundTo(1.235, -2) ->1.24
RoundTo(1.245, -2) -> 1.24
But in reality:
RoundTo(1.235, -2) ->1.24
RoundTo(1.245, -2) -> 1.25
I didn't test it on Linux yet.
It is a known bug?
a.
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