out.txt

该程序是用c实现的词法语法分析器,使用方式参见程序说明.

id0 ( ) { int id5 ; id5 = num9 ; } 


token table:
main          id0
(          (
)          )
{          {
int          int
i          id5
;          ;
=          =8
5          num9
}          }


the output token is
id ( ) { int id ; id = num ; } 


wen fa fen xi:

Program -> id ( ) { Slist } 
Slist -> Dlist Olist 
Dlist -> D A' 
D -> Type id ; 
Type -> int 
A' -> & 
Olist -> O B' 
O -> id = Expression ; 
Expression -> Simple_expression F' 
Simple_expression -> Term C' 
Term -> Factor D' 
Factor -> num 
D' -> & 
C' -> & 
F' -> & 
B' -> &