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

#define size_of(arr) (sizeof(arr) / sizeof(*arr))

#define DEBUG(x, args...)                                                      \
  fprintf(stderr, "ERROR: %s:%u\n" x, __FILE__, __LINE__, ##args)

void cleanup1() { printf("cleanup1\n"); }
void cleanup2() { printf("cleanup2\n"); }
void cleanup3() { printf("cleanup3\n"); }

int main(int argc, char *argv[]) {
  atexit(cleanup1);
  int i = 10;
  // while (i --> 0) {
  //   printf("%d\n", i);
  // }
  while ((i--) > 0) {
    printf("%d\n", i);
  }

  int array[200];
  printf("array[200] len: %ld\n", size_of(array));
  DEBUG("Our array should be 200! %ld\n", size_of(array));
  atexit(cleanup2);

  int num = 11;
  //(num & 1) ? printf("odd\n") : printf("even\n");
  char *res = (num & 1) ? "odd" : "even";
  printf("%s\n", res);
  // if (num & 1) {
  //   printf("odd\n");
  // } else {
  //   printf("even\n");
  // }

  atexit(cleanup3);
  int x = 5;
  printf("%d >> 1 = %d\n", x, x >> 1);
  printf("%d << 1 = %d\n", x, x << 1);

  return 0;
}