How are local and global variables initialized by default?

Question

Based on below, am i right?

• global_A reference is initialized to null.
• global_int is 0
• local_A reference is null
• local_int is uninit

Answer 1

There are no references in your code, so any of your points that mention "references" make no sense.

In your example, both global object - global_int and global_A - are zero-initialized. Both local objects - local_int and local_A - contain indeterminate values, which means that local_int and local_A.x are not initialized.

P.S. Of course, as other already noted, your code is non-compilable. You can't declare A objects before declaring class A (and you are missing a ; after the class definition).