Answer 1

Hmmmm...
Did you know that you can do:
int myCharCode = (int)'a'; //ASCII Code ('a' to 97)
char myChar = (char) 97; (97 to 'a')
to change char to int or int to char ?
Sorry if it isn't what you want :/
I don't know any code of ASCII Table, if I need to know one of them I just do:
int ascii = (int)('a' + x);
Where x is a integer under 26. x)

Answer 2

have you tried casting

(char)array[i]