Variable-length array in file scope?

Question

I have this code for example.

#include 
#include 
#define array_size 3

typedef struct {
    int array[array_size];
} TEST;

v         


        

Answer 1

The simplest approach is to just allocate the memory dynamically:

typedef struct {
    int *array;
    size_t size;
} TEST;

int main() {
    size_t elem_count = /* from user input */
    TEST p;
    p->array = malloc(elem_count * sizeof int);
    if(!p->array)
        return -1;

    p->size = elem_count;
    /* ... */
    free(p->array);
}