# 使用泛型的 TArray 为动态数组排序

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm1 = class(TForm)
Memo1: TMemo;
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
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];

{排序}
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);
const
num = 10;
var
arr: array of Integer;
i: Integer;
begin
SetLength(arr, num);

Randomize;
Memo1.Clear;

{把 10 个随机数放入数组, 并显示在 Memo1 中}
for i := 0 to num - 1 do
begin
arr[i] := Random(100);
end;

{排序}
TArray.Sort<Integer>(arr);

{等 1 秒中后查看排序结果}
Sleep(1000);
Memo1.Clear;
for i := 0 to num - 1 do Memo1.Lines.Add(IntToStr(arr[i]));
end;

end.


posted on 2009-10-09 21:29  万一  阅读(...)  评论(...编辑  收藏