December 2013
Beginner
576 pages
16h 4m
English
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The Bitwise Inclusive-OR Operator
When two values are bitwise inclusive-ORed in Objective-C, the binary representation of the two values is once again compared bit by bit. This time, each bit that is a 1 in the first value or a 1 in the second value produces a 1 in the corresponding bit of the result. The truth table for the inclusive-OR operator is shown next.
b1 b2 b1 | b2————————————————————————0 0 00 1 11 0 11 1 1
So if w1 is a short int equal to hexadecimal 19, and w2 is a short int equal to hexadecimal 6a, a bitwise inclusive-OR of w1 and w2 produces a result of hexadecimal 7b, as shown:
w1 0000 0000 0001 1001 0x19w2 0000 0000 0110 1010 | 0x6a ...
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