1  int
       2  foo ()
       3  {
       4    int i, res;
       5  
       6    for (i = 0, res = 0; i < 50; i++)
       7        res += i;
       8  
       9    return res;
      10  }
      11  
      12  extern void abort ();
      13  
      14  int
      15  main (void)
      16  { 
      17    int res = foo ();
      18  
      19    if (res != 1225)
      20      abort ();
      21  
      22    return 0;
      23  }