RosettaCodeData/Task/Random-number-generator--device-/C/random-number-generator--device--3.c

#include <inttypes.h>
#include <stdio.h>

#include <openssl/err.h>
#include <openssl/rand.h>

int
main()
{
  uint32_t v;

  if (RAND_bytes((unsigned char *)&v, sizeof v) == 0) {
    ERR_print_errors_fp(stderr);
    return 1;
  }
  printf("%" PRIu32 "\n", v);
  return 0;
}