integer null question

This is a discussion on integer null question within the C Programming forums, part of the General Programming Boards category; when i say Code: flag=(int)NULL; is it the same this as saying flag=0; ??...

  1. #1
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    integer null question

    when i say
    Code:
    flag=(int)NULL;
    
    is it the same this as  saying
    
    flag=0;
    ??

  2. #2
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    Yes (at least conceptually), like I said a long time ago (well, several days ago, at least) - along with about 6 other code-improvement suggestions that you ignored completely.

    Edit: entering numbers to array in a row whithout length input

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  3. #3
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    this function works fine. its an incarnation of a pointer version
    the null is a remainder from that version

    what problem could it do if i will change
    Code:
    flag=(int)NULL;
    to
    flag=0

  4. #4
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    Quote Originally Posted by me

    Code:
        if (input[0] != '(')
        {
            flag=(int)NULL;
        }
    (Repeats in several places)
    Surely this doesn't need to be using "(int)NULL", when what you REALLY want is flag=0? It's much clearer and simpler, and does what you want, doesn't it? NULL in C is used to indicate that a pointer is invalid - should not be used for integer variables....
    How is that different from what you are currently saying?

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  5. #5
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    ok i changed it
    it works fine

  6. #6
    Technical Lead QuantumPete's Avatar
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    Quote Originally Posted by transgalactic2 View Post
    this function works fine. its an incarnation of a pointer version
    the null is a remainder from that version

    what problem could it do if i will change
    Code:
    flag=(int)NULL;
    to
    flag=0
    Well, although NULL is normally defined as 0. It *could* also be something else... You shouldn't use NULL for ints anyway. NULL is for pointers.

    QuantumPete
    "No-one else has reported this problem, you're either crazy or a liar" - Dogbert Technical Support
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  7. #7
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    Quote Originally Posted by QuantumPete View Post
    Well, although NULL is normally defined as 0. It *could* also be something else... You shouldn't use NULL for ints anyway. NULL is for pointers.

    QuantumPete
    Which is what I said 5 days back... - But apparently I didn't say it clearly enough [and I think Transgalactic wasn't quite listening, because it didn't actually fix the particular problem he/she was asking about].

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