NULL warning message

This is a discussion on NULL warning message within the C Programming forums, part of the General Programming Boards category; hi every one i am not able to figure out why sometimes this warning message occurs during compilation. can sombody ...

  1. #1
    anu
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    NULL warning message

    hi every one


    i am not able to figure out why sometimes this warning message occurs during compilation.
    can sombody tell me.

    warning C4005: 'NULL' : macro redefinition
    see previous definition of 'NULL'

  2. #2
    Unleashed
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    SAY WHAT !

    I can't really figure it out either.......without seing your code.

    Post your code so I can see what you're trying to do.
    The world is waiting. I must leave you now.

  3. #3
    Registered User pinko_liberal's Avatar
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    Do you have a line in your code like
    #define NULL ****
    NULL is alread defined in some other header like <stdio.h> causing this warning to occur

  4. #4
    ATH0 quzah's Avatar
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    Yup yup. Do something like this, if you want your own definition of NULL:

    #ifdef NULL
    #undef NULL

    Then you can define your own. Or:

    #ifndef NULL
    #define NULL '\0'

    Quzah.

  5. #5
    anu
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    thanx guys

    now i got the idea where i am doing mistake.

  6. #6
    anu
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    thanx guys

    now i got the idea where i am doing mistake.

  7. #7
    Registered User pinko_liberal's Avatar
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    even though I would advise redifining NULL if are including stdio.h

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