Pointers to Multidimensional Arrays
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Thread: Pointers to Multidimensional Arrays

  1. #1
    Junior Member
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    Pointers to Multidimensional Arrays

    Hi there,

    I have a problem that I can't seem to resolve. I know that if we have, say, an integer array A[5], then we can initialise a pointer to an integer as follows:

    int* B = A;

    But I can't seem to figure out what kind of pointer can be initialised to the name of a multidimensional array. For instance, if I have A[5][5], and I want to initialise B to A:

    X B = A;

    what should X be?

    Thanks a lot for your help.

    Sincerely,

    shred2er.

  2. #2
    Junior Member
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    well ,
    it should be
    int *B=A

    this will store the base address that is the starting address of array A ,the 2-d array are stored as linear array internally

  3. #3
    Junior Member
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    Hi vanika,

    Thanks for the response. I had already tried that before posting, but unfortunately it does not work.

    In my program I have defined an array A[3][3]. Then I tried to initialise a pointer to an integer B as follows: int* B = A. The compile-time error is:

    MatrixOperations.C: In function `int main (int, char **)':
    MatrixOperations.C:50: cannot convert `int (*)[3]' to `int *' in
    initialization
    I have also tried int** B = A. There is noe that does not give any compile-time error: int* B = A[5]. But dereferencing B does not produce the desired results.

    But I thank you for your trouble. Perhaps you have some other ideas as well?

    Sincerely,

    shred2er.

  4. #4
    AntiOnline Senior Member souleman's Avatar
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    int (*B)[3] = A


    if I remember correctly, its been a long time
    \"Ignorance is bliss....
    but only for your enemy\"
    -- souleman

  5. #5
    Member
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    Try specifying to the pointer that it has to point to the first element in the array.


    For example
    int A[2][2];
    int*C;
    C=&A[0][0];


    tell me if it gives you any errors
    I Speak in frequencies even dogs have trouble hearing


  6. #6
    Junior Member
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    Originally posted here by Q-bel
    Try specifying to the pointer that it has to point to the first element in the array.


    For example
    int A[2][2];
    int*C;
    C=&A[0][0];


    tell me if it gives you any errors
    Woohoo! Thanks, Q-bel! It works!

  7. #7
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    No problem man just as they've been helping me learn here I gotta try and help out at least in what I can jeje.

    I Speak in frequencies even dogs have trouble hearing


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