No way this is going to compile:
two_character_string[0] = 0;
two_character_string[1] = 0;
char two_character_string[2] = {0, 0};
even if we move the two_character_string declaration before the assignments.
The reason is you can't have an assignment operation outside a function, unless it's an initialization assignment.
So the 2-chars array is declared and initialized. The problem is those two assigments and the fact that (in the original code) the initialization uses a not-yet-declared char variable.
But we're just splitting hairs I guess 