What will the following pseudocode program display?

Module main$()$

Declare Integer x $=1$

Declare Real y $=3\mathrm{.}4$

Display x$,,$ y

Call changeX$($x$)$

Call changeY$($y$)$

Display x$,,$ y

End Module

Module changeX$($Integer a$)$

Set a $=0$

Display a

End Module

Module changeY$($Real Ref b$)$

Set b $=0\mathrm{.}0$

Display b

End Module