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SycoShaman
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Location: Toronto, Canada

Posted: Tue, 29th Mar 2005 16:25 Post subject: C++ help	Quick Quote Quote

I dunno if this is in the right section, I apologize if it isnt. I recently started to learn C++ (dos right now, not mfc). Know vb (somewhat) and internet based languages. Can anyone give me an example of the Bitwise operators in practical use besides when in relation to hardware programming...like, why would i use the bitwise operators to manipulate individual flags when I can do the same with variables? I tried to learn assembly, which is not all that complicated, but boring. If i wanted to manipulate ind. flags, wouldnt it be easier to actually use assembly than bitwise operators? anyway, any help will be welcome

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toeffy
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Posts: 1501

Posted: Tue, 29th Mar 2005 17:12 Post subject:	Quick Quote Quote

moved by me jesus christ was a gangsta rapper. they killed him. he came back and made a platinum album.

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cgreb

Posts: 1

Posted: Sun, 3rd Jul 2005 16:11 Post subject:

Using bits for boolean flags is common because it is a more simpler, more compact and more readable way to specify multiple options than the alternative.

Code:

::MessageBox(NULL,_T("Hello World"),_T("Message"), MB_OK | MB_ICONEXCLAMATION );

is more readable than using a variable for every option:

Code:

::MessageBox(NULL,_T("Hello World"),_T("Message"), TRUE, FALSE,FALSE,TRUE,FALSE,FALSE,FALSE,FALSE,FALSE);

As for using asm, it's not necessary since you can do everything you want wrt bitmasks in C. You really won't need asm at all unless you are optimizing using special instructions like for SIMD etc.

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