A fun executable to try on a 32-BIT x86 machine. I wrote this years and years and years ago.

bypass.c

/*
 * bypass.c
 *
 * Try this on an x86 machine.  It does **not** print "1".
 */

#include <stdio.h>

void weird() {
  int a;
  *(&a + 2) += 7;
}

int main() {
  int x = 0;
  weird();
  x = 1;
  printf("%d\n",x);
  return 0;
}