DWORD Attributes = FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_ARCHIVE | FILE_ATTRIBUTE_DIRECTORY;
// Let''s say that I want to test is the attribute is a
// directory (FILE_ATTRIBUTE_DIRECTORY). What do I do?
if (Attributes ?? FILE_ATTRIBUTE_DIRECTORY)
DoStuff();
See where the question marks are? I''m stuck. What do I put
here?
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Extracting Data using Bitwise Operators
Author
Ok, here''s the scenario:
There is this data that has been passed into a DWORD variable. Let''s say...
if(Attributes & FILE_ATTRIBUTE_DIRECTORY) {
...
}
''and'' means to take the bits of the first number, the bits of the second number, then form a new number that only has a bit set if that bit was found in both numbers. So if Attributes has the FILE_ATTRIBUTE_DIRECTORY bit set, then the above result will be nonzero (because the result will have at least one bit set), ie positive.
...
}
''and'' means to take the bits of the first number, the bits of the second number, then form a new number that only has a bit set if that bit was found in both numbers. So if Attributes has the FILE_ATTRIBUTE_DIRECTORY bit set, then the above result will be nonzero (because the result will have at least one bit set), ie positive.
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