General :: Saving Awk Output To File?

I have a problem with saving output from awk to a file. The commands I tried:

Code:

$ top | awk '/Cpu|Mem/ {if ($1 ~ /Cpu/) {printf strftime("%H:%M:%S")" "; printf strtonum($3)" ";} if ($1 ~ /Mem/) {printf ($5/$3)*100; printf "
";}}' > file.out

and

Code:

$ top | awk '/Cpu|Mem/ {if ($1 ~ /Cpu/) {printf strftime("%H:%M:%S")" "; printf strtonum($3)" ";} if ($1 ~ /Mem/) {printf ($5/$3)*100; printf "
";}}' &> file.out

In both cases file.out is empty. What am I doing wrong?