Sizeof wrong with structures ?????

[wysota]

To add to that, since the referred article doesn't mention it, for GCC there is a "packed" attribute you can set on a data structure.

e.g.

struct foo
{
    char a;
    int x[2] __attribute__ ((packed));
};

struct foo
{
    char a;
    int x[2] __attribute__ ((packed));
};

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