::x what is it mean?

Question

Hello )) in figts i met such a code.
what is it mean "cout << ::x"
::x ?
p.s. sorry for my eng)
https://code.sololearn.com/cad1912qkwm5/?ref=app

Answer 1

in your case it accesses the classes x variable instead of the local one

Answer 2

yes, now i'm understand.
i must read more about scopes
thx!

Answer 3

to global? before main{}?
thx very much