1  a;
       2  b() {
       3    int c = 1;
       4    for (; c <= 3;) {
       5      int d = e() && !0;
       6      switch (c)
       7      case 1:
       8        if (d)
       9        case 2:
      10        case 3:
      11          f();
      12      if (a)
      13        c++;
      14    }
      15  }