main() { static char static_char_array[1]; static char *static_char_pointer; static char static_char; char char_array[1]; char *char_pointer; char character; char *cp, c; c = cp - static_char_array; /* error */ c = cp - static_char_pointer; c = cp - &static_char; /* error */ c = cp - char_array; c = cp - char_pointer; c = cp - &character; }