In c$++,$

Complete the following code contained in a function to write an input validation loop that asks the user to enter $$Y$,$y$,$N$,$ or $$n$$

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char get$\_$input$()\{$

char v;

cout $<<$ "Enter Y$,$ y$,$ N$,$ or n:$"$;

cin $>>$ v;

While$($ v $!=$Y$$ Blank $1$ v $!=$y$$ Blank $2$ v $!=$N$$ Blank $3$ v $!=$n$)\{$

cout $<<$ "Enter Y$,$ y$,$ N$,$ or n:$"$;

cin $>>$ v;

$\}$

return Blank $4$;

$\}$