Answer from cs61c-ei (Jing Chen 16669246) for Question 2
#include <stdio.h>
  void setTo5(int *ptr);

int main ( ) {
  int n = 27;
  int *ptr; 
  ptr = &n; 
  setTo5(&n); 
  printf("n = %d\n", n);  /* should print n = 5 */
  return 0;
}

/* setTo5: set argument to 5 */
void setTo5(int *ptr) {
  *ptr = 5; 
}