Checking whether a number is positive or negative using bitwise operators

Question

I can check whether a number is odd/even using bitwise operators. Can I check whether a number is positive/zero/negative without using any conditional statements/operators l

Answer 1

if( (num>>sizeof(int)*8 - 1) == 0 )
    // number is positive
else
   // number is negative

If value is 0 then number is positive else negative