$[5\mathrm{.}3.$c$]$ What is the output of the following code?

int $i=5$

while $)(1$

$1$

int num $=1$

for $($int $j=1$;$j=i$;$j++)$

$1$

cout $$ num $"x"$

num $***=2$;

$\}$

cout $$ endl;

i$-$ ;

$\}$

$1x2x4x8$