Random Trials

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define N 7

void print(char *rand, int n) {
  int i;
  printf("randoms: [");
  for (i = 0; i < n; i++) {
    printf("%d", rand[i]);
    if (i < n - 1) printf(", ");
  }
  printf("]\n");
}
int main(void) {
  char randoms[] = { 0, 0, 0, 0, 0, 0, 0 };
  int i, j, trial;
  srand((unsigned int) time(NULL));
  trial = rand() % 7 + 3;
  for (i = 0; i < trial; i++) {
    if (rand() % 2) {
      j = rand() % N;
      randoms[j] = 1;
      print(randoms, N);
      randoms[j] = 0;
    }
    else print(randoms, N);
  }
  return EXIT_SUCCESS;
}