函数过程作为参数传递

Question

本帖最后由 flitooo 于 2010-05-19 13:58:53 编辑

Answer 1

用函数指针：type
  TxxProc = procedure;procedure Run(Proc: TxxProc);
begin
  Proc;
end;begin
  Run(A);
end;

Answer 2

unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;type
  TA = procedure;
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    procedure DoA(Foo:TA);
  public
    { Public declarations }
  end;
var
  Form1: TForm1;implementation{$R *.dfm}procedure A();         
begin
  ShowMessage('ok');
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
  DoA(A);
end;procedure TForm1.DoA(Foo: TA);
begin
  Foo;
end;end.