Why structure can not contain Instance of itself? [duplicate]

Answer 1

Because then it would take up "infinite" storage since when it is initialised it recursively initialises itself. You can store pointers to the same structure, however.

e.g. This is invalid:

struct a
{
    int someVar;
    a bad;
};

This is valid (say if you want a linked list of this structure):

struct a
{
    int someVar;
    a* good;
};