Question

I have two doubts, please help me on this:

1. Is it possible to define a class inside union
2. Is it possible to define a class without class name

Answer 1

1 – yes with restriction that class has no constructor or destructor
2 – yes

Following code aggregates both as an example:

union MyUnion
{
    class 
    {
        public:
        int a;
        int b;
    } anonym_access;
    double align;

};

int main()
{
    MyUnion u; //instance checks if it is compileable
}