Using the following code segment:

proc $($int x$,$ int y$)\{$

x$=$x$+$y;

y$=$x$+$y;

cout $<<$ x $<<""<<$ y $<<$ endl;

$\}$

main $()\{$

int a $=1,$ b $=1$;

proc $($a$,$ b$)$;

cout $<<$ a $<<""<<$ b $<<$ endl;

proc $($b$,$ b$)$;

cout $<<$ a $<<""<<$ b $<<$ endl;

$\}$

Show the output if:

call by value is used

call by value$-$result is used

call by reference is used