selection sort

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Grids, Vcl.Menus;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    StringGrid1: TStringGrid;
    StringGrid2: TStringGrid;
    Button1: TButton;
    StringGrid3: TStringGrid;
    Label2: TLabel;
    Edit1: TEdit;
    Label3: TLabel;
    MainMenu1: TMainMenu;
    PopupMenu1: TPopupMenu;
    SaveDialog1: TSaveDialog;
    OpenDialog1: TOpenDialog;
    N1: TMenuItem;
    N2: TMenuItem;
    N3: TMenuItem;
    N4: TMenuItem;
    N5: TMenuItem;
    procedure Edit1Change(Sender: TObject);
    procedure StringGrid1SetEditText(Sender: TObject; ACol, ARow: Integer;
      const Value: string);
    procedure Button1Click(Sender: TObject);
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
    procedure StringGrid1KeyPress(Sender: TObject; var Key: Char);
    procedure N4Click(Sender: TObject);
    procedure N5Click(Sender: TObject);
    procedure N2Click(Sender: TObject);
    procedure N3Click(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

type
    TArray = Array Of Integer;
    TStr = Array of String[5];
var
  Form1: TForm1;
  TempArr : TArray;
  Path, Result : String;
  IsFileOpen : Boolean;
Const
    BAD = 100000;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
Var
    Arr : TArray;
    I, J, K, N, Temp, Min : Integer;
    IsCorrect : Boolean;
begin
    N := StringGrid1.ColCount;
    SetLength (Arr, N);
    IsCorrect := True;
    Result := 'Исходный массив: ';
    For I := 0 To N - 1 Do
    Begin
        Try
            Arr[I] := StrToInt(StringGrid1.Cells[I, 0]);
            Result := Result + (StringGrid1.Cells[I, 0]) + ' ';
        Except
            IsCorrect := False;
        End;
    End;
    If IsCorrect then
    Begin
        K := 0;
        For I := 0 To High(Arr) - 1 do
        Begin
            For J :=  I + 1 To High(Arr)  do
                If (Arr[J] < Arr[I]) then
                Begin
                    Min := Arr[J];
                    Arr[J] := Arr[I];
                    Arr[I] := Min;
                End;
            For Temp := 0 To High(Arr) Do
            Begin
                StringGrid2.Cells[Temp + 1, K] := IntToStr(Arr[Temp]);
                StringGrid2.Cells[0, K] := 'Этап ' + IntToStr(K + 1);
            End;
            Inc(K);
        End;
        Result := Result + ' Отсортированный массив: ';
        For I := 0 To High(Arr) Do
        begin
            StringGrid3.Cells[I, 0] := IntToStr(Arr[I]);
            Result := Result + IntToStr(Arr[I]) + ' ';
        end;

        StringGrid2.Visible := True;
        StringGrid3.Visible := True;
        Label2.Visible := True;
        N3.Enabled := True;

    End;
end;

procedure TForm1.Edit1Change(Sender: TObject);
Var
    N, J, I: Integer;
    IsCorrect : Boolean;
Const
    WIDE = 82;
    HEIGHT = 35;
begin
    IsCorrect := True;
    try
        N := StrToInt(Edit1.Text);
    except
        IsCorrect := False;
    end;
    If Iscorrect then
    begin
        StringGrid1.ColCount := N;

        StringGrid1.ScrollBars := ssHorizontal;
        StringGrid1.Height := 55;
        StringGrid1.Width := WIDE * 7;

        If N < 8 then
        Begin
            StringGrid1.Height := HEIGHT;
            StringGrid1.ScrollBars := ssNone;
            case N of
                1: StringGrid1.Width := WIDE;
                2: StringGrid1.Width := WIDE * 2 + 1;
                3: StringGrid1.Width := WIDE * 3;
                4: StringGrid1.Width := WIDE * 4;
                5: StringGrid1.Width := WIDE * 5;
                6: StringGrid1.Width := WIDE * 6 - 2;
            end;
        End;
        for I := 0 to StringGrid1.RowCount - 1 do
            for J := 0 to StringGrid1.ColCount - 1 do
                StringGrid1.Cells[J, I] := '';
        for I := 0 to StringGrid2.RowCount - 1 do
            for J := 0 to StringGrid2.ColCount - 1 do
                StringGrid2.Cells[J, I] := '';
        StringGrid2.Visible := False;
        StringGrid3.Visible := False;
        StringGrid1.Visible := True;
        StringGrid2.ColCount := N + 1;
        Label2.Visible := False;
        N3.Enabled := False;
        StringGrid2.ScrollBars := ssHorizontal;
        StringGrid2.Width := WIDE * 7;

        If N < 7 then
        Begin
            StringGrid2.ScrollBars := ssNone;
            case N of
                1: StringGrid2.Width := WIDE * 2;
                2: StringGrid2.Width := WIDE * 3 + 1;
                3: StringGrid2.Width := WIDE * 4;
                4: StringGrid2.Width := WIDE * 5;
                5: StringGrid2.Width := WIDE * 6;
                6: StringGrid2.Width := WIDE * 7 - 2;
            end;
        End;
        StringGrid3.ColCount := N;

        StringGrid3.ScrollBars := ssHorizontal;
        StringGrid3.Height := 55;
        StringGrid3.Width := WIDE * 7;

        If N < 8 then
        Begin
            StringGrid3.Height := HEIGHT;
            StringGrid3.ScrollBars := ssNone;
            case N of
                1: StringGrid3.Width := WIDE;
                2: StringGrid3.Width := WIDE * 2 + 1;
                3: StringGrid3.Width := WIDE * 3;
                4: StringGrid3.Width := WIDE * 4;
                5: StringGrid3.Width := WIDE * 5;
                6: StringGrid3.Width := WIDE * 6 - 2;
            end;
        End;

        Button1.Visible := False;
    end;
end;

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
    if (Key = #13) and (Button1.Enabled) then
        Button1.Click;
    If (Not(Key In ['2'..'9', #08, #46])) Then
        Key := #0;
end;


procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
    CanClose := MessageBox(Form1.Handle, 'Вы уверены, что хотите выйти?', 'Выход', MB_YESNO + MB_ICONQUESTION)=ID_YES;
end;

procedure TForm1.N4Click(Sender: TObject);
begin
    Application.MessageBox('Программа сортирует массив методом простого выбора с пошаговой детализацией.'#13#10'Размер массива: 2..9.'#13#10'Диапазон элементов массива: -9999..99999', 'Инструкция', 0);
end;

procedure TForm1.N5Click(Sender: TObject);
begin
    Application.MessageBox('Арефин Владислав гр.251004', 'Разрабочик', 0);
end;

procedure TForm1.StringGrid1KeyPress(Sender: TObject; var Key: Char);
Const
    LIM = 4; // значит 5 - реальный лимит символов
begin
    If (Not(Key In ['0'..'9', #08, #46, '-'])) Then
        Key := #0;
    With Sender As TStringGrid Do
    Begin
        If (Length(StringGrid1.Cells[Col, Row]) > LIM) then
            If (Not(Key In [#08, #46])) Then
                Key := #0;
        If (Length(StringGrid1.Cells[Col, Row]) = 1) and (Key = '-')  then
            Key := #0;
    End;
end;

procedure TForm1.StringGrid1SetEditText(Sender: TObject; ACol, ARow: Integer;
  const Value: string);
var
    I : Integer;
    IsCorrect : Boolean;
    Temp : String;
begin
    IsCorrect := True;
    for I := 0 to StringGrid1.ColCount - 1 do
        If (Length(StringGrid1.Cells[I, 0]) = 0) Then
        begin
            Button1.Visible := False;
            IsCorrect := False;
        end;
    If IsCorrect then
    begin
         Button1.Visible := True;
    end;
    N3.Enabled := False;
end;


Function CheckFileDataForN(Num: String): Boolean;
Const
    MAX_LIM = 99999;
    MIN_LIM = 2;
Var
    NewNum: Integer;
    IsCorrect: Boolean;
Begin
    NewNum := 0;
    IsCorrect := True;
    Num := Trim (Num);
    Try
        NewNum := StrToInt(Num);
    Except
        MessageBox(Form1.Handle, Pchar('Не получилось преобразовать N к целочисленному типу данных. Проверьте корректность данных.'), 'Ошибка', MB_ICONSTOP);
        IsCorrect := False;
    End;
    If(IsCorrect And ((NewNum > MAX_LIM) Or (NewNum < MIN_LIM))) Then
    Begin
        Num := IntToStr(NewNum);
        MessageBox(Form1.Handle, Pchar('N вне разрешенного диапазона! Проверьте исходные данные.'), 'Ошибка', MB_ICONSTOP);
        IsCorrect := False;
    End;
    CheckFileDataForN := IsCorrect;
End;


Function Open (): String;
Begin
    With Form1 Do
    Begin
        If OpenDialog1.Execute Then
        Begin
            Path := OpenDialog1.FileName;
            IsFileOpen := True;
        End
        Else
            IsFileOpen := False;
    End;
    Open := Path;
End;

Function TakeDataFromFile2(Number2: String; Var FileOutput: TextFile): String;
Var               //N
    IsRight : Boolean;
Begin
    IsRight := True;
    Try
        Readln(FileOutput, Number2);
        Number2 := Trim (Number2);
        IsRight := CheckFileDataForN(Number2);
    Except
    End;
    If(Not(IsRight)) Then
        TakeDataFromFile2 := ''
    Else
        TakeDataFromFile2 := Number2;
End;


function SeparateString (Str : String) : TStr;
Var
    StrArr : TStr;
    I, K : Integer;
    Flag : Boolean;
Begin
    K := 0;
    SetLength(StrArr, (Str.Length div 2) + 1);
    For I := 0 To Str.Length div 2 do
        StrArr[i] := '';
    I := 1;
    While I <= Str.Length Do
    begin
        Flag := true;
        While (Str[I] <> ' ') and (I <= Str.Length) Do
        Begin
            StrArr[K] := StrArr[K] + Str[I];
            Inc(I);
            Flag := False;
        End;
        If Not(Flag) then
            Inc(K);
        If Flag then
            Inc(I);
    end;
    I := 1;
    K := 0;
    While Str[I] <> '' Do
    Begin
        If Str[I] = ' ' then
            Inc(K);
        Inc(I);
    End;
    SetLength(StrArr, K + 1);
    Result := StrArr;
End;

function ConvertStringToArray (StringGridColCount : Integer; Var FileOutput: TextFile) : TArray;
Var
    I: Integer;
    Arr : TArray;
    Str : String;
    StrArr : TStr;
Const
    MIN = -9999;
    MAX = 99999;
Begin
    Readln(FileOutput, Str);
    SetLength(Arr, StringGridColCount);
    for I := Low(Arr) to High(Arr) do
        Arr[I] := 0;
    Str := Trim(Str);
    StrArr := SeparateString (Str);
    If (High(StrArr) + 1 <> StringGridColCount) then
    begin
        SetLength (Arr, 1);
        Arr[0] := BAD;
        MessageBox(Form1.Handle, Pchar('Количество элементов массива не совпадает с заявленным. Проверьте исходные данные.'), 'Ошибка', MB_ICONSTOP);
        ConvertStringToArray := Arr;
        Exit
    end;
    try
        For I := Low(Arr) to High(Arr) do
            Arr[I] := StrToInt (StrArr[I]);
    except
        SetLength (Arr, 1);
        Arr[0] := BAD;
        MessageBox(Form1.Handle, Pchar('Не удалось преобразовать исходные данные в целочисленный тип. Проверьте исходные данные.'), 'Ошибка', MB_ICONSTOP);
        ConvertStringToArray := Arr;
        Exit
    end;
    For I := Low(Arr) to High(Arr) do
        If (Arr[I] > MAX) or (Arr[I] < MIN) then
        begin
            SetLength (Arr, 1);
            Arr[0] := BAD;
            MessageBox(Form1.Handle, Pchar('Исходные данные выходят за границы допустимых. Проверьте исходные данные.'), 'Ошибка', MB_ICONSTOP);
            ConvertStringToArray := Arr;
        end;
    ConvertStringToArray := Arr;
End;


procedure TForm1.N2Click(Sender: TObject);
Var
    FileInput: TextFile;
    Num, I: Integer;
    Str1, Str2 : String;
    Arr : TArray;
begin
    Num := 0;
    Path := Open;
    AssignFile(FileInput, Path);
    Reset(FileInput);
    If(IsFileOpen) Then
    Begin
        Str1 := TakeDataFromFile2(IntToStr(Num), FileInput);
    End;
    if Not(Str1 = '') then
    Begin
        Edit1.Text := Str1;
    End
    Else
    Begin
        Edit1.Text := #0;
    End;
    if (Str1 <> '') then
        Begin
            Arr := ConvertStringToArray(StrToInt(Str1), FileInput);
            if (Arr[0] <> BAD) then
            Begin
                for I := Low(Arr) to High(Arr) do
                Begin
                    StringGrid1.Cells[I, 0] := IntToStr(Arr[I]);
                    Button1.Visible := True;
                End;
            End
            else
            Begin
                for I := Low(Arr) to StrToInt(Str1) - 1 do
                Begin
                    StringGrid1.Cells[I, 0] := '';
                End;
                 Edit1.Text := '';
            End;

        End;
    CloseFile(FileInput);
end;


procedure TForm1.N3Click(Sender: TObject);
Var
    FileOutput: TextFile;
    IsCorrect : Boolean;
begin
    IsCorrect := True;
    Path := Open;
    If (IsFileOpen) Then
    Begin
        try
            AssignFile(FileOutput, Path);
            Rewrite(FileOutput);
            Write(FileOutput, Result);
        except
            IsCorrect := False;
            Application.MessageBox('Запись в файл не удалась.', 'Ошибка', MB_ICONSTOP);
        end;
        if IsCorrect then
        Begin
            Application.MessageBox('Запись файла выполнена успешно.', 'Результат', 0);
            CloseFile(FileOutput);
            Edit1.Text := '2';
        End;
    End;
end;

end.