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Are multiple variable-length arrays in a structure in C possible?

Is something like this possible in C? It would be really nice to have both of these.

    typedef struct {
        int r;
        char a0[0];
        char a1[0];
    }
Solution

  • No. Rather use dynamically allocated memory. Something like:

    typedef struct {
    int *data1;
    size_t len1

    int *data;
    size_t len2;
} sometype;

sometype *alloc_sometype(size_t len1, size_t len2) {
    sometype *n = malloc(sizeof(sometype));

    if (!n) return NULL;

    n->len1 = len1;
    n->len2 = len2;

    n->data1 = malloc(sizeof(int) * len1);
    n->data2 = malloc(sizeof(int) * len2);

    // Error handling if those malloc calls fail

    return n;
}