/*
 * Demo C arrays.
 *
 * Jed Yang
 */
#include <stdio.h>
#include <stdlib.h>

int main(void) {
   //int array[6];
   int *array;
   array = malloc(sizeof(int) * 6);
   // TODO: check malloc's return value
   int val;
   val = array[2];
   //printf("%d\n", val);       // gibberish

   for (int i = 0; i < 6; i++) {
      array[i] = 370 + i;
   }

   val = array[2];
   printf("%d\n", val);       // 372

   int *ptr;
   ptr = array + 3;
   printf("%d\n", *ptr);      // 373
   *ptr = 0;                  // change 373 to 0
   ptr++;
   printf("%d\n", *ptr);      // 374
   printf("%p %p %li\n", ptr, array, ptr-array);   // 4, scaled properly
   for (ptr = array; *ptr; ptr++) {
      printf("%i ", *ptr);
   }
   // prints "370 371 372 "
   // common to use "0" to terminate, we will see this with strings again
   printf("\n");

   free(array);
   return 0;
}