how to generalise arrays size

This is a discussion on how to generalise arrays size within the C Programming forums, part of the General Programming Boards category; I'd like to take array's size as input but not declaring before. How to do it....

  1. #1
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    Question how to generalise arrays size

    I'd like to take array's size as input but not declaring before. How to do it.

  2. #2
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    Thats not possible in C. c++ would work. or dynamic arrays would work

  3. #3
    and the hat of wrongness Salem's Avatar
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    C99 allows you to do this

    Code:
    int size;
    scanf("%d", &size);
    int array[size];
    In all versions, you can do
    Code:
    int size;
    scanf("%d", &size);
    int *array = malloc( size * sizeof(*array) );
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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    Tell me about this dynamic arrays. how could I possibly use them.

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    @Salem : thanks.

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