1. Project Part 2: Parser

2. Command line: bison –d translate.y Command line: flex filename.l gcc y.tab.c lex.yy.c -lfl Bison

3. Input to Bison

5. semantic actions (sequence of C statements ) unquoted strings not declared as tokens are taken as nonterminals $$ attribute value of production head $i attribute value of ith symbol in production body Default semantic action is $$=$1

6. Input to Bison

7. bison + flex First use flex to generate yy.lex.c without main function In input to bison, put #include “yy.lex.c” in the declaration part of the file Or Compile both c files with gcc