1  extern int ptbl[4];
       2  extern int ctbl[4];
       3  
       4  void doViews(void) {
       5      int  *c = ctbl, *p = ptbl;
       6      while (1)
       7    {
       8          p++;
       9          c++;
      10          if (*p)
      11          {
      12              if (c == p)
      13              {
      14                  if (*c)
      15                      return;
      16              }
      17              else
      18                return;
      19          }
      20      }
      21  
      22      g();
      23  }