#include <stdlib.h>
#include <stdio.h>
#include <string.h>

struct va {
  int n;
  int nmax;
  int *data;
};

void create_array(struct va *va, int nmax) {
  va->n = 0;
  va->nmax = nmax;
  va->data = (int *) malloc(nmax * sizeof(int));
  if(va->data == NULL)
    // no space left to allocate data...
    return;
}

void init_array(struct va *va, int n, int *src) {
  if(n > va->nmax)
    return;
  va->n = n;
  memcpy(va->data, src, n*sizeof(int));
}

void free_array(struct va *va) {
  if(va->data)
    free(va->data);
  va->nmax = 0;
  va->n = 0;
  va->data = NULL;
}

int main(int argc, char *argv[]) {
  struct va va;
  int t[5] = {1,2,3,4,5};
  int i;

  create_array(&va, 12);
  init_array(&va, 5, t);

  for(i = 0; i < va.n; ++i) {
    printf("%d\n", va.data[i]);
  }

  free_array(&va);

  return 0;
}