[ZZ]bison flex for windows 使用说明

you will need the lastest versions of:

1. flex-2.5.4a-1.exe

2. bison-2.4.1-setup.exe

3. After that,do a full install in a directory of your preference?without spaces in the name. I suggestC:GnuWin32. Do?not?install it in the?default?(C:Program Files (x86)GnuWin32) because bison has problems with spaces in directory names,not to say parenthesis.

4. Also,consider installing?Dev-CPP?in the default directory (C:Dev-Cpp)

5. After that,set the PATH variable to include the bin directories of?gcc?(in?C:Dev-Cppbin) andflexbison?(in?C:GnuWin32bin). To do that,copy this:?;C:Dev-Cppbin;C:GnuWin32bin?and append it to the end of the?PATH?variable,defined in the place show by this figure:
   

   

   
   If the figure is not in good resolution,you can see a?step-by-step here.

6. Open a prompt,cd to the directory where your ".l" and ".y" are,and compile them with:

   1. flex hello.l
   2. bison -dy hello.y
   3. gcc lex.yy.c y.tab.c -o hello.exe

You will be able to run the program. I made the sources for a simple test (the infamous?Hello World):

Hello.l

? %{ ? #include <stdlib.h>"y.tab.h" ? %}%%("hi"|"oi")"n" ? ? ? { return HI; ?}"tchau""bye" BYE . ? ? ? ? ? ? ? ? ? ?  yyerror(); ? int main(void) ? ? ?yyparse ? ? ? 0 yywrap ? ? ? printf"Errorn"); ? ? ? exit(1 

Hello.y

%token HI BYE  program: ? ? ? ? ?hi bye ? ? ? ?  hi ? ? ? ? ? ? HI ? ?  printf"Hello Worldn" ? ? ? ?  bye ? ? ? ? ? ? BYE ? ?"Bye Worldn" exit ? ? ? ? ?;