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Friday, November 18

Lex and Yacc in Windows 7 - Compile and Run


Hi Friend,
I was in search for a long time to get a platform in windows-7 to run lex and Yacc ,for academic purposes. Many of my friends also had the same problem and often forced to choose Linux only for merely executing Lex & Yacc programs..!!!

At last, I found one solution and its my pleasure to share it with all of you.!!  :)

Its very simple.You need to download two very small files.
You have to download two executable( i.e.,   .exe files). In total,its size may have about 370KB.

To download them click the links below.

Link 1:   Flex

Link 2:  Bison

Save both files in same place. ( I did in D: --> Flex)
Keep the lex program to be compiled also in same place.


Now open command prompt--> reach your directory through command prompt.

To compile, type command 
                flex <filename> (eg:- flex myflex.l)

If your program is error-free, lex.yy.c will be generated.


We can compile this C file with any C compiler available (eg: Turbo C)

and generate yy.lex.exe

Now just run yy.lex.exe. Its your lexical analyser..!!!




I hope this post was useful for you.!!
Please comment your feedback here.!!
Thank You.!!  :)








23 comments:

  1. Anonymous19 November 2011 at 02:27

    There are fresh versions of Flex and Bison for windows platform at http://sourceforge.net/projects/winflexbison/ You can try it.

    ReplyDelete
  2. Arjun22 November 2011 at 08:15

    osum man!! \m/

    ReplyDelete
  3. v!p!n22 November 2011 at 10:07

    @Arjun
    thank u Arjun..!! I hope it was useful 4 u..!!

    ReplyDelete
  4. Mohammad Rahman30 December 2011 at 18:18

    thanks for the information. it helps :)

    ReplyDelete
  5. v!p!n2 January 2012 at 18:28

    Nice to know that.....:)

    ReplyDelete
  6. Rahul koul1 February 2012 at 15:12

    Hello sir,
    ur blog is really very helpful...!!!
    sir am working on Parallelization in C compiler which uses lex and yacc...!!
    so need some little help from ur side..... would be very nice of u...!!

    ReplyDelete
  7. sachinkalsi158 March 2012 at 22:38

    i'm not able to compile the lex.yy.c file...it is showing some warnings....what should i do nw?,...

    ReplyDelete
  8. abhi CEA19 August 2012 at 21:03

    This comment has been removed by the author.

    ReplyDelete
  9. hemant19 March 2013 at 17:43

    having linker error while trying to execute the c file using tc

    ReplyDelete
  10. Unknown3 July 2013 at 21:14

    hey!when i execute counter.l cmd is showing
    D:\flex\flex counter.l
    flex:can't open ounter.l

    ReplyDelete
  11. Anonymous11 October 2013 at 14:48

    Linker error..................

    ReplyDelete
  12. Unknown10 November 2013 at 11:41

    how to compile yacc programs

    ReplyDelete
  13. Prasanna19 November 2013 at 07:41

    @Amrutesh M Mahadev

    Same question dude..

    ReplyDelete
  14. Unknown15 April 2014 at 16:09

    how to generate lex.yy.exe ??

    ReplyDelete
  15. Bhaskar Sharma16 September 2014 at 02:21

    Wow! I was searching for this of software to run yacc programs at home.

    ReplyDelete
  16. Anonymous10 December 2014 at 22:45

    Please update your link for FLEX and BISON.Now,longer it is not available. After opening the link,webpage says "Object not Found!!!"
    Update your blog details ASAP..

    ReplyDelete
  17. Unknown13 December 2016 at 17:15

    link not working

    ReplyDelete
  18. Unknown25 February 2017 at 14:40

    how to compile and run yacc program in telnet?

    ReplyDelete
  19. Unknown17 April 2017 at 21:17

    Very useful

    ReplyDelete
  20. Anonymous29 April 2017 at 13:10

    hmm.. acha.. theek hai..

    ReplyDelete
  21. Anonymous7 December 2017 at 14:58

    flex cant open my lex file?? what shall i do??

    ReplyDelete
  22. Anonymous7 February 2018 at 18:29

    my laptop is windows 10 yaar,i could not able to download,plsss help me out

    ReplyDelete