but when 155 and 105 are XORed, that produces 240, not 242.

Says who? The exclusive or of two bit patterns contains a one for each mismatch pair of bits and a zero for each matched pair. Thus for 155 and 105:

# 1001 1011 - 155
# 0110 1001 - 105
# 1111 0010 - 242

[download]
The fun thing about XOR is that if you XOR the result with one of the input values, you get the other input value back:
# 1001 1011 - 155
# 1111 0010 - 242
# 0110 1001 - 105

[download]
Thus various encryption schemes (and some fun graphics programming on early PCs :)

In reply to Re: Bitwise Operators - TT&^/TT by TheoPetersen
in thread Bitwise Operators - &^ by dsb

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