What are the different posibilities of getting "Invalid floating point operation" in dephi applications?
venuvasulu 0 Newbie Poster
BitFarmer 0 Junior Poster in Training
Many, basically trying to do something not matematically possible: Divide by cero, log of a negative number, sqrt of a negative number... and also operations with a result out of the limits: a:= Power(999,999) for instance won't fit in your PC!
deyken 0 Newbie Poster
Hi There,
This issue usually occurs when you attempt to convert a null string to a floating point, for instance:
[var
\ MyFloat : Double; {or extended if you want}
procedure Button1OnClick(Sender : TObject);
begin
MyFloat := StrToFloat(Edit1.Text); {<== Error occurs here when Edit1.Text is empty}
end;
]
To fix this problem is easy. Simply use the alternative type casting function StrToFloatDef(String Value, Default Float). So:
[var
\ MyFloat : Double; {or extended if you want}
procedure Button1OnClick(Sender : TObject);
begin
MyFloat := StrToFloatDef(Edit1.Text, 15.28); {<== Error occurs here when Edit1.Text is empty}
end;
]
HOPE THAT HELPS!
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