unit Unit4;interfaceuses  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;type  TForm4 = class(TForm)    Button1: TButton;    Memo1: TMemo;    Button2: TButton;    procedure Button1Click(Sender: TObject);  private    { Private declarations }  public    { Public declarations }  end;var  Form4: TForm4;implementation{$R *.dfm}procedure integer1(a: Integer);begin  a := a + 1;end;procedure integer2(const a: Integer);begin  //什么都不做  a.ToString;end;procedure integer3(var a: Integer);begin  a := a + 1;end;procedure integer4(out a: Integer);begin  a := a + 1;end;procedure Int641(a: Int64);begin  a := a + 1;end;procedure Int642(const a: Int64);begin  //什么都不做  a.ToString;end;procedure Int643(var a: Int64);begin  a := a + 1;end;procedure Int644(out a: Int64);begin  a := a + 1;end;procedure TForm4.Button1Click(Sender: TObject);var  i: Integer;  i2: Int64;begin  i := 10;  i2 := 10;  Integer1(i);  Memo1.Lines.Add(i.ToString);end;end.