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×¢ÒâÒýÓÃ Filectrl µ¥Ôª
use Filectrl;
procedure TForm1.Button1Click(Sender: TObject);
var
Dir: String;
begin
SelectDirectory('Select a directory', '', Dir);
ShowMessage(Dir);
end;


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Delphi±í´ïʽ

function ExpCalc(exp: string): string;
var
vScript: Variant;
begin
vScript := CreateOleObject('ScriptControl');
vScript.Language := 'VBScript';
Result := vScript.Eval(exp);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
s:string;
begin
s:=ExpCalc('100 *4.17/0.5*(55. ......

delphi virtual dynamic

dynamic¾ÍÊÇËüÊǶ¯Ì¬·½·¨£¬Ã»Óо²Ì¬µØÖ·£¬ËùÒÔËÙ¶ÈÂýÒ»µã
virtualÊÇÐé·½·¨£¬Èç¹ûÔÚ»ùÀàÖв»ÉùÃ÷³ÉÐé·½·¨µÄ»°£¬¼Ì³Ðºó£¬¸Ã·½·¨»áÌáʾһ¾¯¸æÐÅÏ¢£¬°Ñ»ùÀàÖз½·¨ÆÁ±ÎµôÁË
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1.Round£¨ËÄÉáÁùÈëÎåÁôË«£©
¹¦ÄÜ˵Ã÷£º¶ÔÒ»¸öʵÊý½øÐÐËÄÉáÎåÈë¡£(°´ÕÕÒøÐмÒËã·¨)
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var
i, j: Integer;
begin
i := Round(1.5); // iµÈÓÚ2
j := Round(2.5); // jµÈÓÚ2
end;
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