Answer from cs61c-ex (Aneirin Nunn 15254032) for Question 2
  #include 
  int main ( ) {
      int n = 27;
      setTo5 (&n);
      printf ("n = %d\n", n);  /* should print n = 5 */
      return 0;
  }

void setTo5 (int *p) {
  *p = 5;
}