七、使用泛型的 TArray 为动态数组排序
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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses
Generics.Collections; {引用泛型单元}
{给字符串数组排序}
procedure TForm1.Button1Click(Sender: TObject);
var
arr: array of string;
i: Integer;
begin
{设置动态数组大小}
SetLength(arr, memo1.Lines.Count);
{复制 Memo1 中的文本到数组}
for I := 0 to Memo1.Lines.Count - 1 do arr[i] := Memo1.Lines[i];
TArray.Sort<string>(arr);
{在 Memo1 中查看数组中的数据}
Memo1.Clear;
for i := 0 to Length(arr) - 1 do Memo1.Lines.Add(arr[i]);
end;
{给整数数组排序}
procedure TForm1.Button2Click(Sender: TObject);
var
arr: array of Integer;
i: Integer;
const
num = 10;
begin
SetLength(arr, num);
Randomize;
Memo1.clear;
//生成10个随机数放入数组,并显示在MEMO中
for i := 0 to num - 1 do begin
arr[i] := Random(100);
Memo1.Lines.Add(IntToStr(arr[i]));
end;
//排序
TArray.Sort<Integer>(arr);
//等一秒
Sleep(1000);
Memo1.clear;
for i := 0 to num - 1 do begin
Memo1.Lines.Add(IntToStr(arr[i]));
end;
end;
end.
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object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 217
ClientWidth = 290
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
PixelsPerInch = 96
TextHeight = 13
object Button1: TButton
Left = 207
Top = 152
Width = 75
Height = 25
Caption = 'Button1'
TabOrder = 0
OnClick = Button1Click
end
object Button2: TButton
Left = 207
Top = 183
Width = 75
Height = 25
Caption = 'Button2'
TabOrder = 1
OnClick = Button2Click
end
object Memo1: TMemo
Left = 8
Top = 8
Width = 193
Height = 200
Lines.Strings = (
'Memo1')
TabOrder = 2
end
end