#include

#include

using namespace std;

void UpdateArea$($double$*$ areaPointer, double areaValue$)\{$

if $($areaPointer $==$ nullptr$)\{$

cout $<<$"areaPointer is null." $<>$ action;

cin $>>$ value;

if $($action $==\text{'}$Y$\text{'})\{$

areaPointer $=$ &area;

$\}$

else $\{$

areaPointer $=$ nullptr;

$\}$

UpdateArea$($areaPointer$,$ value$)$;

cout $<<$ "Area is $"<<$ fixed $<<$ setprecision$(1)<<$ area $<<"."<<$ endl;

return $0$;

$\}$