dev-cpp-users

[Dev-C++] Friend functions

[Farzan H. <far...@ho...>]

Dear C++ users,
I have problem with friend functions and namespaces.
Assume we have class "MyClass" defined in namespace "MyNameSpace":
namespace MyNameSpace
{
    class MyClass
   {
      private:
         int data;
      public:
         int func(){}
         friend int main();
   };
}

using namespace name;
int main()
{
     C obj;
     obj.data;
     return 0;
}
  I want to allow "main()" to access private members so I made it friend =
=20
for the class. Since "main()" does not belong to "MyNameSpace" the =20
compiler can not make it a friend for the class. It trys to find a =20
"main()" function which belongs to the namespace not a "Main()" function =
=20
outside.
Now I want to k now if there is solution for this problem.
Thanks,

--=20
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Re: [OBORONA-SPAM] [Dev-C++] Friend functions

[Denis K. <di...@ya...>]

Tuesday, May 17, 2005, 1:39:34 PM, you wrote:
Hi.  You've forgot a semicolon after last closing bracket of namespace
declaration.
FH> Dear C++ users,
FH> I have problem with friend functions and namespaces.
FH> Assume we have class "MyClass" defined in namespace "MyNameSpace":
FH> namespace MyNameSpace
FH> {
FH>     class MyClass
FH>    {
FH>       private:
FH>          int data;
FH>       public:
FH>          int func(){}
FH>          friend int main();
FH>    };
FH>
    };    // ';' should be placed here to define that class  MyClass belongs
          // to namespace MyNameSpace
In the implementation file of MyClass's members you shouldn't place a
semicolon. e.g.
namespace MyNameSpace {
   int MyClass::func()
   {
     //...
   }
}

If you whant to declare some friend function in the class declaration
then you should place function prototype before the class declaration. e.g.
int main();
namespace MyNameSpace
{
    class MyClass
    {
       friend int main();
       ...

And at last...  what's for do you need an access for private members
in main() function? It's hard to imagine a real reason for doing this.

FH> using namespace name;
FH> int main()
FH> {
FH>      C obj;
FH>      obj.data;
FH>      return 0;
FH> }
FH>   I want to allow "main()" to access private members so I made it friend
FH> for the class. Since "main()" does not belong to "MyNameSpace" the
FH> compiler can not make it a friend for the class. It trys to find a
FH> "main()" function which belongs to the namespace not a "Main()" function
FH> outside.
FH> Now I want to k now if there is solution for this problem.
FH> Thanks,




-- 
Best regards,
 Denis