/*
 * This code, with deliberate array errors, could do almost anything
 * when it prints x and z and will probably then segfault.
 */
#include <stdio.h>
#include <math.h>

int main() {
  double x = 0, y[2], z = 0;
  int i;

  printf("x is at %p y at %p z at %p\n", &x, y, &z);

  for (i = 0; i <= 2; ++i ) /* !! */
    y[i] = sqrt(2.0);

  printf("X is %f z is %f\n", x, z);
  
  /* If you thought the previous loop was bad ... */
  while ( 1 ) {
    i *= 12345;
    printf("i is %d\n", i);
    y[i] = y[-i] = sqrt(3.0);
  }
    
  return 0;
}