[hapa_at_1]

how does masking works in c++
how can i extract the position of my desire from a series of bits given to me

for instance if

16 in bit is

10000
how can i get the 3rd number
please adivce

[shabbir]

You need to do the Bitwise AND (&) / Bitwise OR (|) to do the masking

Truth table is as follows
OR

+-----+-----+-----+
| OP1 | OP2 | O/P |
+-----+-----+-----+
|  0  |  0  |  0  |
|  0  |  1  |  1  |
|  1  |  0  |  1  |
|  1  |  1  |  1  |
+-----+-----+-----+

AND

+-----+-----+-----+
| OP1 | OP2 | O/P |
+-----+-----+-----+
|  0  |  0  |  0  |
|  0  |  1  |  0  |
|  1  |  0  |  0  |
|  1  |  1  |  1  |
+-----+-----+-----+

Or it with all Zeros and you get the the masked digit or AND it with 1.