Chinna said:
Hi,
I am trying to under this operator |=.Has anybody got some documentation
/ online link to explain this....
THnks
Chinna
The number 10 written in binary format is:
8's 4's 2's 1's
--- --- --- ---
1 0 1 0
The number 11 written in binary format is:
8's 4's 2's 1's
--- --- --- ---
1 0 1 1
Assume 1 is equal to true and 0 is equal to false. Now OR each column
together:
1 0 1 0
1 0 1 1 OR
----------
<--result?
In the first column(the leftmost column) you have (true OR true), which
is true, i.e you write 1 for the result:
1 0 1 0
1 0 1 1 OR
----------
1 <--result?
In the second column, you have (false OR false), which is false, i.e you
write a 0 for the result:
1 0 1 0
1 0 1 1 OR
----------
1 0 <--result?
In the third column, you have (true OR true), which is true:
1 0 1 0
1 0 1 1 OR
----------
1 0 1 <--result?
In the last column, you have (false OR true) which is true:
1 0 1 0
1 0 1 1 OR
----------
1 0 1 1 <--result?
What number is that?
8's 4's 2's 1's
--- --- --- ---
1 0 1 1
1x8 + 0x4 + 1x2 + 1x1 = 11. So 10 | 11 is equal to 11.
The syntax a |= b is similar to the syntax a += 1. a += 1 is equivalent
to a = a + 1. So a |= b is equivalent to a = a | b. From the above you
should now know how to OR two numbers together: convert the numbers to
binary format and then OR the columns together.
