example how to convert/print binary to decimal
(1) your binary number 1 0 1 1 0 1 0 1, saved in an int[] array
(2) build a table for  binary bit as following:

            1   x
            2
            4   x
            8
           16   x
           32   x
           64
          128   x
notice the 'x' indicating a particular binary bit should be added in the later step

(3) add the right most decimal digits marked with 'x', you got 1+4+6+2+8= 21, add this line to the table,
you got


            1   x
            2
            4   x
            8
           16   x
           32   x
           64
          128   x
-------------------------
           21   x

(4) add the second rightmost decimal digits (mared with 'x') of the above table
you got 1+3+2+2=8, add a new line

            1   x
            2
            4   x
            8
           16   x
           32   x
           64
          128   x
-------------------------
           21   x
-------------------------
           8

(5) do the same for the thrid rightmost digit, you got

            1   x
            2
            4   x
            8
           16   x
           32   x
           64
          128   x
-------------------------
           21   x
-------------------------
           8    x
------------------------
          1     x

(6) for this example, we stop here, and the final result is 181 as showed in the table.