The $2-$dim array should have three rows.

The first row should contain the zero integers from the input array.

The second row should contain the negative integers from the input array.

The third row should contain the positive integers from the input array.

The entries in each row should be in the same order that they were in in the input array.

Any one of the three rows could be an empty array $($even all three of them$).$

Use an enhanced for$-$loop whenever possible.