Programming :: Read A Blank Line Ie A String Of Length 0?

Apr 19, 2010

in gcc how to read a blank line ie a string of length 0.my code:

Code:
#include<stdio.h>
#include<string.h>

[code]...

View 3 Replies


ADVERTISEMENT

Programming :: Read The Presence Of A Blank Line In Gcc?

Apr 20, 2010

in gcc how to read a blank line ie a string of length 0.

my code: Code:
#include<stdio.h>
#include<string.h>
#include<string>
using namespace std;
[Code]....

View 4 Replies View Related

Programming :: Access A File Line By Line, And Check The Length Of Each Line.

Feb 13, 2011

I want to access a file, and check the length of every line.After, i want to check and replace all lines with length over 10 characters, with a message.Does anyone have a clue on that?

View 1 Replies View Related

Programming :: Create A Simple Program With Will Continually Read Input From The User Until They Enter A Blank Line?

Apr 6, 2011

basically i have to create a simple program with will continually read input from the user until they enter a blank linei know how to read in certain input but not sure how to get it continually in a loop

View 2 Replies View Related

Programming :: FreePascal: Mysql_query Syntax Error While Sql String Have Length More Than 256 Chars

Sep 1, 2010

I have an error like this : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''bla..bla..' at line 1. while call my function below:

function InsertSQL(strSQL: AnsiString; CS: TCriticalSection; var ErrMsg: AnsiString): boolean;
var
td: TDBCfg;
SockMySQL: PMySQL;
SQL: PChar;
begin
CS.Acquire;
[Code]...

The function always got this error while length of my strSQL contains more than 256 chars.

View 1 Replies View Related

Programming :: Pthread - Take String From The Command Line And Creates A Thread To Print The String

May 3, 2011

I've been trying to understand pthread in C a little better. So I made a simple program that takes in a string from the command line and creates a thread to print the string. I've looked online and copied the basic concepts but there are something things I'm confused about. The programs works just fine, but I have questions. Here's what I have so far.

[Code]....

One thing I'd like to know is why the 3rd argument in the pthread_create function which is my SendMessage function needs to be typecasted to a void pointer and then send the address of the function. Also as for the 4th argument, I would see typecasting to void pointer in some of the pthread examples I saw online, but in my case I'm passing a char pointer, would this be correct? In which case would I ever want to pass a void pointer?

Do I need a pthread_exit(NULL) in my main and in the SendMessage function? If so, why? I added the sleep() function so that I could let the pthread_exit function in my SendMessage function execute first. I simply saw that the online examples on pthread had pthread_exit() in both locations.

View 6 Replies View Related

Programming :: Read Unknown Data Length From Usb Pipe?

Aug 12, 2010

I've written a usb device driver and a program that sends and receives data over the bulk pipe. The read function sometimes returnsI'm reading an unknown amount of data. However, using a usb tracker I can see that the correct data is being sent.The error only occurs sometimes.I expect that the read function is told to read more data that it receives it would fail and return -1, however if this was the case then every read call would fail.

View 4 Replies View Related

Programming :: Using Sed Replace Line Containing Particular String By A Single String?

Oct 16, 2010

I have a set of lines as ahown below:

Leon went to school
Leon came back from school..
Leon had dinner...

I have to replace the line containing "dinner" by a single string LUNCH...

View 2 Replies View Related

Programming :: How To Read A String And Add It At The End In Unix

Jun 9, 2010

I want to read the line in the text file and get the string in the file and paste it in the directory column

for example i have a line like /ftp/prod/SWC1407.DOC

from this 1407 should be parsed and appended at the end of the move command

mv /ftp/prod/SWC1407.DOC /nfp/1407

View 7 Replies View Related

Programming :: Open Two Text Files - Read Them Line By Line And Update Parameters Of The 3rd File ?

Oct 18, 2010

I have two txt files containing x and y coordinates: xcoord.txt & ycoord.txt. I need to open them; read them line by line to get each coordinate; then each time I need to update Xs and Ys parameters inside another file called "dc.in" with the grabbed values.

Finally each time I need to run two exe files ( dc_2002 and st_vac) and produce corresponding output for each Xs and Ys ( dc.in is an input file for this exe files)

I have written the following code but it does not work:

View 14 Replies View Related

Programming :: Bash: Read A Text File Line By Line?

Jul 7, 2011

bash 3.1.17(2) I'm trying do write a shell script which must operate on each line of an ASCII text file. So, all the code must be inside a loop, and inside the loop, the first thing should be to read the next line from the file. I have the bash read command. But it reads from stdin. Any way to make read from a file?

View 6 Replies View Related

Programming :: C - Read A String Into Shmget And Shmat?

Mar 8, 2010

I want to read a string into shared memory using shmget and shmat. I'm using something like:

Code:
char *bookmark_strings, *s;
Book_Key = ftok(SHM_LOC,SHM_KEY);
shared_bookmarks = shmget(Book_Key, MAX_BOOKMARKS * sizeof(bookmarks), (0644 | IPC_CREAT));
bookmark_strings = shmat(shared_bookmarks, NULL, 0);
s = bookmark_strings;
*s = "hello";

I know that since it's a string I should be using something other then just char, but with something different shmat fails to be assigned.

View 6 Replies View Related

Programming :: Read A File And Parse A String In C++

Jul 26, 2010

I need to read a file and parse a string. I know in Perl there is the split command. Is there something similar to that in C++?

View 6 Replies View Related

Programming :: Perl Script To Read Line By Line

Aug 2, 2011

I just learn perl script.May i know how to simplify the code below especially in the red color part? i saw some examples in internet, they use "next" command.

View 20 Replies View Related

Programming :: QTimer To Read A File Line After Line?

Mar 25, 2010

I need a qtimer to trigger reading of a file line by line, I have the code sort of running with the timer trigger but qtimer will just read the first line over and over as it is now.

Here is the code so far:

self.lcdtimer = QTimer()
self.connect(self.pushButton85,SIGNAL("clicked()"),self.update)
self.connect(self.lcdtimer, SIGNAL("timeout()"), self.lcdxyz)

Code:

def lcdxyz(self):
import time
import os

[code]....

View 12 Replies View Related

Programming :: Read In Stdin And Ping Line By Line?

Jan 8, 2010

Code:

#!/usr/bin/perl
use 5.10.0;
use strict;
use warnings;
use Net::Ping;

[code]....

View 1 Replies View Related

Programming :: Add String On The Beginning And End Of The Line ?

Aug 3, 2010

I need to output of a script to a file with tags.

I'm trying sed and was able to put a tag on the end of the line

Code:

Output is

Quote:

What I need to have is

Quote:

I'm thinking of I redirect my first sed command to a file and then use sed again to put <group> at the beginning of the line. My problem is how to put <group> to all beginning of the string.

View 2 Replies View Related

Programming :: How To Append A String To A Next Line In Perl

Apr 9, 2010

I have a requirement like this..this just a sample script...

Code:

when i run this scipt...

Code:

Code:

It is appended in the same line...

I want it to be added to the next line.....

I want to do this by explitly using the filehandles in perl....and not with redirection operators in shell.

View 1 Replies View Related

Programming :: How To Read Line By Line In A File In C

Feb 5, 2010

i want to read line by line in a files in C language actually my porblem is i have a one file cotains

if iam using fgets, it is reading each time AT only it does not moving to Ok in that file

View 6 Replies View Related

Programming :: Read File Line By Line?

Mar 23, 2011

so I have a script that creates couple of txt files. First file output is something like below..

cn=test,ou=something,ou=some,o=org
cn=testa,ou=something,ou=some,o=org
cn=testb,ou=something,ou=some,o=org

second file output is something like below..
usera
userb
userc

Quote:

userdn=`ldapsearch -x -h $server -LLL "(objectclass=person)" dn | grep dn: | cut -d" " -f2 > userdn.txt

for i in $(cat userdn.txt);do

ldapsearch -h $server -p 389 -x -D $admid -w $admpwd -s one -b "$userdn" dn | grep dn: | cut -d" " -f2 | cut -d"=" -f2 | cut -d"," -f1 > user.txt

for i $(cat user.txt);do

echo "$userdn"
done
done

when I ran both ldapsearch commands invidually, they work fine. But when I ran script, I got first file correctly but not the second one. It looks like its not reading the first file correctly and not setting the variable ($userdn) value correctly in the second ldapseach command. I want read first file first line and run the second ldapsearch and continues, then read the second line..and so on.

View 3 Replies View Related

Programming :: Append Variable String In A Specific Line?

Jun 8, 2010

I want to append a variable string to the end of a specific line. not like append the same string to each line. like in my file i have 4 columns, i want to add a string in 5th column in some fixed row.

View 4 Replies View Related

Programming :: Delete Line In File Matching String?

Jan 26, 2010

Quote:Originally Posted by topcatI would like to know how i can write a shell script to delete a line if a particular pattern exists?E.g. I have a text file with multiple lines. Say 1000s. in the following pattern.

username@email.com:149.0.3.4:1
username1@email.com:149.0.3.4:1
username1@email.net:149.0.3.4:1
username1@email.edu:149.0.3.4:1

If the patternusername@email.com exists then the line "username@email.com:149.0.3.4:1 should be deleted from the file.I have a very similar question but I need to delete one line in a file which matches one very precise instance of a string only. Let's assume I have a file composed of thousands of lines and let's call the file chap-secrets. Let's take the following sample entries:

Code:
#USERNAME SERVER PASSWORD IP
pp pptpd blahblah *

[code]....

View 7 Replies View Related

Programming :: Find String In Text File And Add Something To That Line

May 26, 2011

I want to know how can I add something to a specific line.. the output would be something like:
abc
def 123
ghi

Search for string "def" and add something to that line.

View 1 Replies View Related

Programming :: Replace An "entire" Line Containing A Particular String With A New Line?

Mar 12, 2010

I think this can be done using sed. Let's say I have file called, "orig.txt" with following contents:

Code:
[User Prefs]
Ignore Unrequested Popups=1
DevTools Splitter Position=500
History View Style=0

[Code]....

So basically if a line contains the word "Home URL" then go ahead and replace that *entire* line with the supplied *new* line.

View 4 Replies View Related

Programming :: Adding Number And String To Each Line In Data File

Apr 10, 2010

I have a very large data file, with 3 numbers in each line, ex. 3 4 5 ; 6 7 8.I want to add two numbers (0 and 1) at the end of every line, and a string at the beginning of the line. Does anyone know a efficient way to do so?

View 7 Replies View Related

Programming :: Csh Shell Script - String Concatenation - Add A New Line Character?

May 4, 2009

Inside a loop i'm populating a string variable. Because csh doesn't have very good support for arrays I thought of doing this. I want to add a new line character to the end of the concatenation each time the loop iterates. Then at the end print this variable out.

I tried " and some resources said it was just a "". Neither work. What am I doing wrong?

View 1 Replies View Related

Programming :: Copy String A To String B And Change String B With Toupper() And Count The Chars?

Oct 22, 2010

copy string a to string b and change string b with toupper() and count the chars

View 3 Replies View Related

Programming :: Reading In A Outside Text File And Putting In The String On That Line Into A Char Array That Is Already Allocated?

Mar 29, 2011

Here is the issue. I am reading in a outside text file and putting in the string on that line into a char array that is already allocated.

Code:
int main(int argc, char *argv[])
{

[code]....

View 1 Replies View Related

General :: Sed/awk/grep Search For Number String Of Variable Length In Text File?

Jan 19, 2010

I need to search a text file for a string of numbers which are different lengths, and always are between number=" and " like:

number="1234567890"
number="22390"

I need to grab those numbers and pipe each one to a line in a file. I've already tried something with awk and that didn't seem to work.

View 10 Replies View Related

Programming :: Read A Line From A Txt File In A Script?

Dec 9, 2010

have been playing around with a script for a few hours and now I need to be able to output the lines in a text file one by one to be used later in the script.What it gonna do is to read a log file and grep the usernames, then write them to a file, and then run one script for each user, to search for more information about them in the log.But I don't know how to output a single line from a file, and google does not return any solution.

View 3 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved