syntax tree

Token list:
(int)
(main, identifier)
((, lparen)
(void)
(), rparen)
({, lcurly)
(int)
(num, identifier)
(,, comma)
(denom, identifier)
(,, comma)
(quot, identifier)
(,, comma)
(rem, identifier)
(;, end_statement)
(read)
(num, identifier)
(,, comma)
(denom, identifier)
(;, end_statement)
(if)
(denom, identifier)
(=, logical)
(0, integer)
(then)
(write, identifier)
((, lparen)
("the denominator has an invalid value 0!", string)
(), rparen)
(;, end_statement)
(else)
({, lcurly)
(rem, identifier)
(:=, assignment)
(num, identifier)
(;, end_statement)
(quot, identifier)
(:=, assignment)
(0, integer)
(;, end_statement)
(while)
(rem, identifier)
(>=, logical)
(denom, identifier)
(do)
({, lcurly)
(rem, identifier)
(:=, assignment)
(rem, identifier)
(-, add/sub)
(denom, identifier)
(;, end_statement)
(quot, identifier)
(:=, assignment)
(quot, identifier)
(+, add/sub)
(1, integer)
(;, end_statement)
(}, rcurly)
(;, end_statement)
(write, identifier)
((, lparen)
("quotient = ", string)
(,, comma)
(quot, identifier)
(), rparen)
(;, end_statement)
(write, identifier)
((, lparen)
("remainder = ", string)
(,, comma)
(rem, identifier)
(), rparen)
(;, end_statement)
(}, rcurly)
(;, end_statement)
(}, rcurly)



Symbol table:
(main, identifier)
(num, identifier)
(denom, identifier)
(quot, identifier)
(rem, identifier)
(0, integer)
(write, identifier)
("the denominator has an invalid value 0!", string)
(1, integer)
("quotient = ", string)
("remainder = ", string)



Syntax tree:
(int)
   (main, identifier)
      ((, lparen)
         (void)
      ({, lcurly)
         (int)
            (num, identifier)
               (denom, identifier)
               (quot, identifier)
               (rem, identifier)
         (read)
            (num, identifier)
               (denom, identifier)
         (if)
            (=, logical)
               (denom, identifier)
               (0, integer)
            (then)
               (write, identifier)
                  ((, lparen)
                     ("the denominator has an invalid value 0!", string)
         (else)
            ({, lcurly)
               (:=, assignment)
                  (rem, identifier)
                  (num, identifier)
               (:=, assignment)
                  (quot, identifier)
                  (0, integer)
               (while)
                  (>=, logical)
                     (rem, identifier)
                     (denom, identifier)
                  (do)
                     ({, lcurly)
                        (:=, assignment)
                           (rem, identifier)
                           (-, add/sub)
                              (rem, identifier)
                              (denom, identifier)
                        (:=, assignment)
                           (quot, identifier)
                           (+, add/sub)
                              (quot, identifier)
                              (1, integer)
               (write, identifier)
                  ((, lparen)
                     ("quotient = ", string)
                     (quot, identifier)
               (write, identifier)
                  ((, lparen)
                     ("remainder = ", string)
                     (rem, identifier)