// usage: cc -o char_array_longlong char_array_longlong.c
// output: 0x706050403020100
//         0xf0e0d0c0b0a0908
#include <stdio.h>
#include <stdint.h>

int main() {
  uint8_t array[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 ,14, 15};
  for(int i=0; i<sizeof(array); i+=8) {
    uint8_t *p = array + i;
    uint64_t l = *((uint64_t *)p);
    printf("0x%llx\n", l);
  }
  return 0;
}