Are anonymous unions and structs within a struct permissible ?

[pereges]

eg.

typedef struct XYZ
{
double x;
union
{
struct
{
int a;
};

struct
{
int b;.
};
};
};

If so how does one access the elements inside such a structure ?

 

[Ali Karaali]

eg.

typedef struct XYZ
{
   double x;
   union
   {
     struct
     {
        int a;
     };

     struct
     {
       int b;.
     };
  };

};

If so how does one access the elements inside such a structure ?

You cant access but if you define like that

struct
{
int i;
int db
}NAME;

NAME is variable that type is a struct.
You can access to i and db like that

NAME.i;
NAME.db;