1  struct mouse_button_str {
       2          signed char left      : 1;
       3          signed char right     : 1;
       4          signed char middle    : 1;
       5  };
       6  int g(void)
       7  {
       8    unsigned char a = 0;
       9    struct mouse_button_str *newbutton1 = (struct mouse_button_str*)&a;
      10    newbutton1->left = 1;
      11    return a;
      12  }