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我在procedure TdmQ0301.rsQ0114Entry1FEarnAccountGetText(Sender: TField; var Text: String; DisplayText: Boolean);begin if Sender.AsCurrency = 0 then Text := '' else Text := FormatCurr(AppObj.GCurrFormat, sender.AsCurrency);end;中规格化了货币值,使用了,弹出“浮点数错误”,原因是什么,有什么方法解决吗?