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unit CombinationFrms;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Math;
type
TCombinationFrm = class(TForm)
Memo: TMemo;
btnAlgoRecurs: TButton;
Edit: TEdit;
btnAlgoIteratif: TButton;
btnAlgoNumeral: TButton;
ckxResultInFile: TCheckBox;
procedure btnAlgoRecursClick(Sender: TObject);
procedure btnAlgoIteratifClick(Sender: TObject);
procedure btnAlgoNumeralClick(Sender: TObject);
private
{ Déclarations privées }
public
{ Déclarations publiques }
function GetBuffSize(CharsLen: integer; LineSepLen: Integer): Integer;
procedure SafeCombinationRecurs(Tab: String);
procedure SafeCombinationIterat(const Tab: String);
procedure SafeCombinationNumeral(Tab: String; CombSize: Integer);
procedure SafeCombinationNumeralOpt(Tab: String; CombSize: Integer);
end;
var
CombinationFrm: TCombinationFrm;
implementation
{$R *.dfm}
function _Power(Base, Exponent: Integer): Integer;
var
i: Integer;
begin
Result := 1;
for I := 1 to Exponent do
Result := Result * Base;
End;
function TCombinationFrm.GetBuffSize(CharsLen: integer; LineSepLen: Integer): Integer;
begin
Result := (CharsLen + LineSepLen) * _Power(CharsLen, CharsLen);
if Result > 16777216 then
raise Exception.Create('Nombre de caractère trop élevé pour la mémoire !');
End;
procedure TCombinationFrm.SafeCombinationRecurs(Tab: String);
var
Size: Integer;
procedure Combination(Level: Integer; Combin: string);
var
i: Integer;
begin
if Level = 0 then
begin
Memo.Lines.Add(Combin);
end
else
begin
for i := 1 to Size do
Combination(Level-1, Combin+Tab[i]);
end;
End;
begin
Memo.Clear;
Size := Length(Tab);
if Size < 1 then
exit;
Combination(Size, '');
End;
procedure TCombinationFrm.btnAlgoRecursClick(Sender: TObject);
var
d: TDateTime;
begin
d := Now;
SafeCombinationRecurs(Edit.Text);
ShowMessage('Durée = ' + FormatDateTime('hh:nn:ss:zzz', Now - d));
End;
procedure TCombinationFrm.SafeCombinationIterat(const Tab: String);
var
Levels: array of PChar;
Size, I: Integer;
Combin: String;
procedure WriteCombination;
var
I : Integer;
begin
for I := 1 to Size do
Combin[i] := Levels[Size-I]^;
Memo.Lines.Add(Combin);
End;
function NextCombination: Boolean;
var
I: Integer;
begin
Result := True;
I := 0;
while True do
begin
if (Levels[i]+1)^ = #0 then
begin
Levels[i] := @Tab[1];
Inc(I);
if (I >= Size) then
begin
Result := False;
exit;
end;
end
else
begin
Inc(Levels[i]);
exit;
end;
end;
End;
begin
Memo.Clear;
Size := Length(Tab);
SetLength(Levels, Size);
SetLength(Combin, Size);
for I := 0 to Size-1 do
Levels[i] := @Tab[1];
repeat
WriteCombination;
until not NextCombination;
End;
procedure TCombinationFrm.btnAlgoIteratifClick(Sender: TObject);
var
d: TDateTime;
begin
d := Now;
SafeCombinationIterat(Edit.Text);
ShowMessage('Durée = ' + FormatDateTime('hh:nn:ss:zzz', Now - d));
End;
procedure TCombinationFrm.SafeCombinationNumeral(Tab: String; CombSize: Integer);
var
I, MaxValue, Value: Int64;
TabSize, J : Integer;
S: TStream;
Combin: String;
const
CombinatFileName = 'C:\Temp\Combinat1.txt';
begin
if not ckxResultInFile.Checked then
S := TMemoryStream.Create
else if FileExists(CombinatFileName) then
S := TFileStream.Create(CombinatFileName, fmOpenWrite)
else
S := TFileStream.Create(CombinatFileName, fmCreate);
try
TabSize := Length(Tab);
MaxValue := _Power(TabSize, CombSize);
S.Size := MaxValue * (CombSize + 2);
S.Seek(0, soBeginning);
SetLength(Combin, CombSize+2);
Combin[CombSize+1] := #13;
Combin[CombSize+2] := #10;
I := 0;
while I < MaxValue do
begin
Value := I;
for J := CombSize downto 1 do
begin
Combin[J] := Tab[Value mod TabSize + 1];
Value := Value div TabSize;
end;
S.Write(Combin[1], CombSize+2);
Inc(I);
end;
finally
S.Free;
end;
End;
procedure TCombinationFrm.SafeCombinationNumeralOpt(Tab: String; CombSize: Integer);
var
I, MaxValue: Integer;
TabSize: Integer;
S: TStream;
Combin: String;
pc, pcf: PChar;
first, last: Char;
CombSize2: Integer;
const
CombinatFileName = 'C:\Temp\Combinat2.txt';
begin
if not ckxResultInFile.Checked then
S := TMemoryStream.Create
else if FileExists(CombinatFileName) then
S := TFileStream.Create(CombinatFileName, fmOpenWrite)
else
S := TFileStream.Create(CombinatFileName, fmCreate);
try
TabSize := Length(Tab);
MaxValue := _Power(TabSize, CombSize);
CombSize2 := CombSize + 2;
S.Size := MaxValue * CombSize2;
S.Seek(0, soBeginning);
Combin := StringOfChar(Tab[1], CombSize)+#13#10;
pcf := @Combin[1];
first := Tab[1];
last := Tab[TabSize];
for I := 0 to MaxValue-1 do
begin
S.Write(Combin[1], CombSize2);
pc := @Combin[CombSize];
while pc >= pcf do
begin
if pc^ = last then
begin
pc^ := first;
Dec(pc);
end
else
begin
Inc(pc^);
break;
end;
end;
end;
finally
S.Free;
end;
End;
procedure TCombinationFrm.btnAlgoNumeralClick(Sender: TObject);
var
d: TDateTime;
begin
if (Edit.Text = '') or (Edit.SelLength = 0) then
exit;
d := Now;
SafeCombinationNumeral(Edit.Text, Edit.SelLength);
ShowMessage('Durée = ' + FormatDateTime('hh:nn:ss:zzz', Now - d));
d := Now;
SafeCombinationNumeralOpt(Edit.Text, Edit.SelLength);
ShowMessage('Durée = ' + FormatDateTime('hh:nn:ss:zzz', Now - d));
End;
END. |
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