Conditional IF Brain Fart

This is a discussion on Conditional IF Brain Fart within the C Programming forums, part of the General Programming Boards category; In trying to check that R, G, B gives white then would this statement suffice: Code: if (R == G ...

  1. #1
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    Thumbs down Conditional IF Brain Fart

    In trying to check that R, G, B gives white then would this statement suffice:

    Code:
    if (R == G == B == 255)
    {
    ....
    }

    Thanks
    Last edited by paulogrady; 04-12-2009 at 11:04 AM.

  2. #2
    Chinese pâté foxman's Avatar
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    No.

    Code:
    if (R == 255 && G == 255 && B == 255)
    {
    }
    I hate real numbers.

  3. #3
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    Thumbs up

    Thanks for the fast answer !

  4. #4
    C++ Witch laserlight's Avatar
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    No, you are looking to use ||, e.g., R == 255 || G == 255.

    EDIT:
    Oh yes, since you actually want all three to match 255, then yes && would be correct, not ||.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  5. #5
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    @Above: As far as I know, white is when (R == 255 && G == 255 && B == 255).

    And like loxman said compare all to 255 or

    if (R == G && G == B && B == 255) ...
    Last edited by Brafil; 04-12-2009 at 11:09 AM.

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