/* this includes all valid tokens -- you may include other character 
literals if you like */
/* a comment on one line */
else
elseif
if
ifif
int
INT
return void while
+ - * / < <= > >= == != = ; , ( ) [ ] { } /**/
/**/
/* a comment on several lines with a * and a / in the middle
plus some keywords else if int return 
void 
while */
_id1
___id2
_i_d_3
388989
4.998
4id9
float char for do
floatcharfordo
++ -- ! 
_
a
'0'
'1'
'2'
'3'
'4'
'5'
'6'
'7'
'8'
'9'
'A'
'B'
'C'
'D'
'E'
'F'
'G'
'H'
'I'
'J'
'K'
'L'
'M'
'N'
'O'
'P'
'Q'
'R'
'S'
'T'
'U'
'V'
'W'
'X'
'Y'
'Z'
'a'
'b'
'c'
'd'
'e'
'f'
'g'
'h'
'i'
'j'
'k'
'l'
'm'
'n'
'o'
'p'
'q'
'r'
's'
't'
'u'
'v'
'w'
'x'
'y'
'z'
'\n'