类的成员被定义为protected后,应该是能被子类访问,但不能被他的对象访问但下面的这段程序却可以运行,并通过。
unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;type
TTest = class
protected
a:integer;
public
end;
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
var aaa:TTest;
begin
aaa := TTest.Create;
aaa.a :=1;
showmessage(inttostr(aaa.a));
end;end.
同样的,在java也可以访问,以下一段在JBuilder中通过:
import java.*;
public class mydesireclass extends myclass {
protected int value2=1;
}import java.*;public class test3 {
public test3() {
}
public static void main(String[] args)
{
mydesireclass cdtest = new mydesireclass();
System.out.print(cdtest.value2);
}
}但在vc里对象却是不能访问protected的.请问应该如何理解protected???
unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;type
TTest = class
protected
a:integer;
public
end;
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
var aaa:TTest;
begin
aaa := TTest.Create;
aaa.a :=1;
showmessage(inttostr(aaa.a));
end;end.
同样的,在java也可以访问,以下一段在JBuilder中通过:
import java.*;
public class mydesireclass extends myclass {
protected int value2=1;
}import java.*;public class test3 {
public test3() {
}
public static void main(String[] args)
{
mydesireclass cdtest = new mydesireclass();
System.out.print(cdtest.value2);
}
}但在vc里对象却是不能访问protected的.请问应该如何理解protected???
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请大家支持下。。谢谢!
http://community.csdn.net/Expert/topic/3632/3632147.xml?temp=.2835962
http://community.csdn.net/Expert/topic/3607/3607671.xml?temp=.128689