473,513 Members | 2,403 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

lexx/yacc incorrect analyzing?

Kiritler
1 New Member
My program translates regular lexical expressions in DNF.
Faced with the problem of incorrect reading of the input string
The symbol "!" it recognize as a "(" and "*" causes segmentation fault

I have no idea why it happens, I can't find any error in my code

Thank you very much!
To start write in the terminal:
make
./DNF <test.txt
Attached Files
File Type: zip prog23_10.zip (1.8 KB, 55 views)
Nov 9 '11 #1
0 1287

Sign in to post your reply or Sign up for a free account.

Similar topics

4
6330
by: Profetas | last post by:
Hi. I was wondering how can I access the yacc functions? because when use a normal yacc function such as qstring { yylval.string = strdup(yytext+1); if(yylval.string !='"')...
4
4881
by: Rodrick Brown | last post by:
This might be off topic but can someone give me a quick run down on why tools like lexx/yacc/bison are usefull ? I know what there used for but not sure when they should be used and where ? ...
6
15457
by: Volker Hetzer | last post by:
Hi! We are finding ourselves in a situation where we have to parse several more or less free format text files. In the past, on linux, we had flex and bison for generating very fast parsers for...
1
4247
by: deepusrp | last post by:
Helo everyone, i am doing a project on some graphic tool using qt as the front end. i am using lex and yacc as parser. now i am facing a problem since yacc generates only c code as i want to...
13
4994
by: Berk Birand | last post by:
Hi, I am working on a school project where we use lex/yacc to write a compiler for a fictional (Java-like) language. I have handled all the details about the yacc and lex files, but I still have...
2
7490
by: max.giacometti | last post by:
Hi everybody! I am using lex and yacc to write a vhdl to systemc converter. Lex simply reads the input file and yacc implements grammar and translation. I'd like to be able to make yacc...
2
1945
by: Mohitz | last post by:
Hi Guys, I am facing a peculiar problem with my yacc script. Following is the snippet of the yacc script that i am using. I am using lex as the lexical analyzer. Sample Input :
1
1908
by: neena.usenet | last post by:
I have a gui that reads in a file using C++/yacc. If the file has a parsing error, yacc throws the error to my program and I report it. The problem is at that point, I would like to try to open...
5
2165
by: thomas | last post by:
hello I m writing a simple parser using bison. I just used someone's else c++ grammar, to produce a code beutifier. The thing is , most of the actions for productions would have form {$$ = $1 + $2...
1
2010
by: Robert | last post by:
If the goal is to take a 1-dimensional package of text and produce a tree data structure that is easy to understand and manipulate, and then write C/C++ code that works with that tree - does...
0
7386
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
7543
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
1
7106
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
7534
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
1
5094
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...
0
4749
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and...
0
3236
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The...
0
1601
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...
1
805
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.