词法分析器的自动产生_LEX Lex Source Lex lex.yy.c program compiler lex. I C lex. yy.c a out compiler Input sequence a out stream tokens词法分析器的自动产生--LEX Lex compiler Lex source program lex.l lex.yy.c C compiler lex.yy.c a.out a.out Input stream sequence of tokens