struct memory

This is a discussion on struct memory within the C++ Programming forums, part of the General Programming Boards category; If I have this structure: Code: typedef struct { unsigned char c; unsigned char c1; unsigned char data1; unsigned char ...

  1. #1
    Supermassive black hole cboard_member's Avatar
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    struct memory

    If I have this structure:

    Code:
    typedef struct
    {
            unsigned char    c;
            unsigned char    c1;
            unsigned char    data1;
            unsigned char    data2;
            unsigned char    data3;
    } aStruct_t;
    How is that arranged in memory compared to:

    Code:
    typedef struct
    {
            unsigned char    c;
            unsigned char    c1;
            unsigned char    data[3];
    } aStruct_t;
    ?
    Just curious really.
    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

    - Mike McShaffry

  2. #2
    Rabble Rouser Slacker's Avatar
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    It depends on how your compiler arranges and adds internal padding between structure members. This is one of the many things that doesn't have a definite answer.

  3. #3
    Registered User
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    2,662
    An array reserves contiguous space in memory, which enables you to advance a pointer along the data using pointer arithmetic.

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