1  struct clock {
       2    long sec; long usec;
       3  };
       4          
       5  int foo(void)
       6  {
       7    struct clock clock_old = {0, 0};
       8  
       9    for (;;) {
      10      long foo;
      11  
      12      if (foo == clock_old.sec && 0 == clock_old.usec);
      13    }
      14    return 0;
      15  }
      16