using namespace sid;

void change$($ini "data$)$;

int main$(0)$

$\{$

int $a[4]=\{2,5,4,5\}$;

change$($a$)$;

cout $$ "data is $"a[2]$ endl; return $0$ ;

void change$($int $*$a$)$

$\{$

for $($int $i=1$;$i<mn\; id="EditorElement\_11250131">4</mn>$;$i++)$

i

$a[i]=a[i-1]-a[i]+a[i+1]$;

$\}$

for int $i=1$;$i<mn\; id="EditorElement\_11249997">3</mn>$;$i++$

i

$a[i]=++i$;

Select one:

a$.$ error

b$.$ data is $5$

c$.$ data is $4$

d$.$ data is $?$