Code doubt1

This is a discussion on Code doubt1 within the C Programming forums, part of the General Programming Boards category; Dear All, I am getting one more doubt..what exactly following peace of code will do? Code: #if FS_AdcStatusChn0 == FS_AdcStatusChn0_ACTIVE ...

  1. #1
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    Code doubt1

    Dear All,
    I am getting one more doubt..what exactly following peace of code will do?

    Code:
    #if FS_AdcStatusChn0 == FS_AdcStatusChn0_ACTIVE
              AdcChn0 |
    #endif

  2. #2
    Woof, woof! zacs7's Avatar
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    What's with all the macro hacks you're asking about?

    Depends on the context, get a C book. That way you won't ask about every possible combination of pre-precessor "codez".

    Btw it's not a "doubt" if it's a question, a doubt is where you think it does x but you're not sure.

  3. #3
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    Quote Originally Posted by zacs7 View Post
    What's with all the macro hacks you're asking about?

    Depends on the context, get a C book. That way you won't ask about every possible combination of pre-precessor "codez".

    Btw it's not a "doubt" if it's a question, a doubt is where you think it does x but you're not sure.

    Hello Zacs,

    Just i wanted to know what you mean by:-

    [code]

    #if FS_AdcStatusChn0 == FS_AdcStatusChn0_ACTIVE
    AdcChn0 | //Only this part i am not able to follow:-
    #endif

  4. #4
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    It says to the compiler that it should generate the code inside the #if when the condition is true. What that achieves, as stated by zacs7, depends (a lot) on the context.

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  5. #5
    and the hat of int overfl Salem's Avatar
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    People are interested in if you have something like
    Code:
    flags = foo |
    #if FS_AdcStatusChn0 == FS_AdcStatusChn0_ACTIVE
            AdcChn0 | //Only this part i am not able to follow:-
    #endif
            bar;
    Which either means you have
    Code:
    flags = foo |
            AdcChn0 | //Only this part i am not able to follow:-
            bar;
    OR
    Code:
    flags = foo |
            bar;
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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