itis a program to solve the lexical expressions .its efficeincy is very good in solving the expressions-itis a program to solve the lexical expressions .its efficeincy is very good in solving the expressions...
不需要做任何修改的lex-yacc的demo,可以在parser generator或lex-bison下成功运行-Do not need to make any changes to the lex-yacc the demo, or a parser generator in the lex-bison successfully running