enum myenum
{
    first_value,
    second_value
};

enum myenum
{
    first_value,
    second_value
};

enum myenum x;
enum myenum *mypointer=&x;

enum E {
    X, Y, Z
};

typedef enum  {
   X, Y, Z
} E;

int main() {
  E e;
  E * ep;
  ep = & e;
}

#define SUCCESS 0
#define LITTLE_ERROR 1
#define BIG_ERROR 2

enum
{
    SUCCESS,
    LITTLE_ERROR,
    BIG_ERROR
};