/*
  CSE 374 Winter 2014
  Lecture 9, Slide 10 Example B
  (zero argument to f)
*/

#include <stdio.h>

int* f(int x) {

  int *p;

  if (x) {
    /* whether this code executes or not depends on the value of x */
    /* the scope of y is only within these { } */
    int y = 3;
    /* ok */
    p = &y;
  }

  /* if x evaluated to true, then p points to the address that had 
     represented where y was stored, otherwise who knows where it points */

  /* at any case, p is dangling because y either never existed or went 
     out of existence at } */
  *p = 7;
  return p;
}

void g(int *p) {
  *p = 123;
}

/* changed function h on the slide to main */
int main() {
  g(f(0));
  return 0;
}