Handbook之016：Delphi开放数组

开发数组，参数用const限定词,Slice为取部分长度的数组成员。也可以直接用 [] 的方式传参

代码如下：

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
uses
  System.Diagnostics,
  System.Math;

type
  TDays = array of Integer;
//函数定义

procedure ShowOpenArrays(const AArrayInt: array of Integer);
var
  I: Integer;
begin
  for I := Low(AArrayInt) to High(AArrayInt) do
  begin
    Form1.Memo1.Lines.Add(‘开放数组[‘ + I.toString + ‘] := ‘ + AArrayInt[I].toString);
  end;
end;

//计时
procedure TForm1.Button1Click(Sender: TObject);
var
  m_ArrayInt: array[0..2] of Integer;
begin
  m_ArrayInt[0] := 6;
  m_ArrayInt[1] := 8;
  m_ArrayInt[2] := 12;
  //Slice为取数组部分成员
  ShowOpenArrays(Slice(m_ArrayInt, 2));
  ShowOpenArrays([33,44,520]);
end;

end.