代码如下:unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, DB, ADODB, DBTables, Grids, DBGrids, CheckLst,
ComCtrls,Unit3;type
TForm1 = class(TForm)
DataSource1: TDataSource;
.....
private
{ Private declarations }
public
{ Public declarations }
Thread_For_Test:TMyThread;
china:integer;
end;var
Form1: TForm1;
//public
//Thread_For_Test:TMyThread;implementation
....////////////////////////////////////////////////////////////unit Unit2;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls,Unit3,Unit1;type
TForm2 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form2: TForm2;implementation{$R *.dfm}procedure TForm2.Button1Click(Sender: TObject);
begin
china:=0;
end;end.错误是:
Unit2:undeclared identifier:'china'
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, DB, ADODB, DBTables, Grids, DBGrids, CheckLst,
ComCtrls,Unit3;type
TForm1 = class(TForm)
DataSource1: TDataSource;
.....
private
{ Private declarations }
public
{ Public declarations }
Thread_For_Test:TMyThread;
china:integer;
end;var
Form1: TForm1;
//public
//Thread_For_Test:TMyThread;implementation
....////////////////////////////////////////////////////////////unit Unit2;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls,Unit3,Unit1;type
TForm2 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form2: TForm2;implementation{$R *.dfm}procedure TForm2.Button1Click(Sender: TObject);
begin
china:=0;
end;end.错误是:
Unit2:undeclared identifier:'china'
begin
unit1.form1.china:=0;
end;end.
begin
unit1.form1.china:=0;
end;end.