#include <stdio.h>


int len(int *arr) {
  printf("sizeof arr: %d\n", (sizeof arr));
  return sizeof arr / sizeof arr[0];
}

void printArray(int *arr, int len) {
  for (int i=0; i<len; i++) {
    printf("arr[%d] : %d\n", i, arr[i]);
  }
}

int main(int argc, char *argv[]) {
  constexpr int SIZE = 5;
  int arr[SIZE] = { 0 };

  //printf("sizeof arr: %d\n", (sizeof arr));
  //printf("sizeof int * %d\n", (sizeof(int *)));

  //int len = sizeof arr / sizeof arr[0];
  printf("len : %d\n", len(arr));
  printArray(arr, SIZE);
  return 0;
}