创建一个域，主题和对象

我的朋友们
我想用C或C ++语言实现域(即unix域).(域，主题和对象是有关保护操作系统的非常重要的主题)
-我们有*.* txt文件，其中包含4列和任意行.
在此表中，我们要添加对象和对象及其对对象的访问权限及其操作(添加或删除或搜索).
如果要添加与以前将其添加到列表具有相同访问权限的主题和对象，则将此2个主题添加到1个域中；否则我们将它们放在2个不同的域中.
程序的输出必须能够在4列中显示其主题和对象的任何域.
方面，穆罕默德·哈迪尼娅

hi , my friends
I want to implement domain( i.g. unix domain) in c or c++ language.(domain,subject and object is very important subject about protection of operating systems)
- we have *.*txt file that contain 4 columns and any rows.
in this table we want to add sub ject and object with its access right to which object and its operation(add or delete or search).
if we want to add subject and object with same access rights that formerly added it to list, we add this 2 subject to 1 domain; else we put them in 2 different domain.
the output of program must be able to show any domain with its subject and objects in 4 columns.
with respect, mohammad hadiniya