Array of ints

This is a discussion on Array of ints within the C Programming forums, part of the General Programming Boards category; Does anyone know how to pass an array of ints to a function? i tried Code: int a[2][2] = { ...

  1. #1
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    Array of ints

    Does anyone know how to pass an array of ints to a function?
    i tried
    Code:
    int a[2][2] = { {1, 2}, {3, 4} };
    function(a);
    
    void function(int **a) {
      printf("%d\n", a[1][1]);
    }
    and it didn't seem to work.
    Any suggestions?

  2. #2
    and the hat of wrongness Salem's Avatar
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    > void function(int **a) {
    Should be one of these - choose which is most readable

    void function(int a[2][2] ) {

    void function(int a[][2] ) {

    void function(int (*a)[2] ) {
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
    the Corvetter
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    You could also do:

    void function(int a[][])

    Right, Salem?
    1978 Silver Anniversary Corvette

  4. #4
    and the hat of wrongness Salem's Avatar
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    > void function(int a[][])
    > Right, Salem?
    No, not right.

    You can only leave the leftmost [] empty.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  5. #5
    the Corvetter
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    I see. You can have:
    Code:
    void function (int arr[]); /* legal */
    void function (int arr[][2]); /* illegal */
    But, doesn't that limit what you can do with something like this?

    --Garfield
    1978 Silver Anniversary Corvette

  6. #6
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    Seems to work now.
    Thanks

  7. #7
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    void function (int arr[][2]);

    This is legal. Nothing wrong with it.
    I compile code with:
    Visual Studio.NET beta2

  8. #8
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    hi,
    could anyone pls a complete sourcecode showing how to use the function in main? i tried several versions that didn't work. and how can i pass a pointer to the array, not just a copy of it?

  9. #9
    and the hat of wrongness Salem's Avatar
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    > and how can i pass a pointer to the array, not just a copy of it?
    Arrays are always passed as a pointer, you have no choice.

    > could anyone pls a complete sourcecode showing how to use the function in main?
    See the original poster
    &nbsp; function(a);
    is the way
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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