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]....

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Programming :: Programing - Reading File Line By Line Then Char By Char In Each Line

May 29, 2010

I've never programed shell scripting.

Code goes like so:

I simply want to read a file "data.txt" line by line Then char by char and add them into a result var. The file is supossed to always contain numeric values

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Programming :: Reading Text File Into An Array

Oct 20, 2010

I know that this is a really simple thing to do but I just can't figure it out. How do I read a text file into an array in C++?

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Programming :: C String As An Array Of Chars And As A Pointer To Char?

May 13, 2009

Please look at the comments

Code:
/*
* TEST CASE TO CHECK DIFFERENCES BETWEEN STRING AS

[code]...

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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.

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Programming :: Point A Char Pointer To A Part Of Another Char Array?

Nov 4, 2010

Programming in C.I have two char arrays.char buf1[1024];char buf2[1024];Aren't buf1 and buf2 also pointers?I read in 1024 bytes into buf1 which contain about 300 bytes of characters with newlines. The data is basically a few English sentences. I'm trying to scan buf1 for newlines and then stop at the 1st newline and copy the rest of the data from that 1st newline into buf2.So I run a for loop to look for that new line.

Code:
for(i=0; i<1024;i++) {
if((strcmp(&buf1[i], "

[code]...

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Programming :: SH: Remove Last Char If It Is An Empty Char In A String

Jul 5, 2011

With this I may remove the last emtpy char which is not visible, coming from net, windows, ...

Code:
echo "$mystringwindowsorotherwithemptylastchar" |sed s/.$//

However if there are not then it makes a problem and delete effectively an existing char.

Code:
echo "klklj" |sed s/.$//
klkl

Anyone would have a solution for SH?

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General :: Reading Numbers From Text File And Storing In Array?

May 26, 2010

I'm writing a bash script where I read a text file (containing a column of numbers) and store each line in an array. There seem to be some problems with the whole thing however, but only for some files and not others. Here's what I do:

Code:
#!/bin/bash
file=time_notOk.txt ### The file with a column of numbers
i=0 ### Array counter
### Read the file

[Code]....

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Programming :: Convert Short Array To Char Array?

Jun 7, 2010

I have trouble converting a short array to a char array

Code:

short pShort[4] = { 0x41, 0x42, 0x43, 0x44 };

How to convert this to a char array?

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Programming :: Reading A File Of Data In An Array?

Feb 10, 2011

I have two files of data with different numbers of columns and rows. I want to read this two files in two arrays and then compare for example the second column of first data file with the third column of the other text file and if the difference between of two numbers is less than a threshold then the program print the information in the rows which fulfill this condition in the third text file. I have written below program but the problem is that it does not go through all rows of second file.

declare -a a
declare -a b
r=` awk '{n++} END {print n}' second.txt `
echo $r
awk '
{

[Code]....

Actually I have two data files one of them contains 44406 and the other one has 12066 rows and I want to check whether the difference between the components of two specific columns is less than a threshod but I have simplified it here. I had written this code and then I have realized that this code just goes through the number of rows as the same as the first.txt file and ignores the rest. I could not find the problem yet.

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Programming :: Bash - Reading Csv Delimited File To Array And For Further Manipulation?

Jan 6, 2010

I am trying to do this:

1. Read csv delimited file line1 and store all values in array

2. Use the values stored in the array and replace values in other text file with them

3. read line2 in the cvs file and repeat the process

4. Do above for all lines in the cvs file

for example:

file1.cvs content:

text1,text2,text3,"text 4"
a1,a2,3,"a 4"

file.txt content:

some text $array1$ some text
some text $array2$ some text

1. read line 1 - text1,text2,text3,"text 4" put each value in array X[] lines that contain spaces in cvs will have double quotes

2. read x[1] and replace value $array1$ (in file.txt) with x[1]read x[2] and replace value $array2$ (in file.txt) with x[2] and so on

Can above be accomplished in BASH and how?

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Programming :: Reading File Permissions Into Bash Array For Processing

Dec 1, 2010

I would like to read unix file permissions into a bash array for processing but tbh I have no idea how to do this. Then I will check for each individual access right l, d, x etc.

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General :: Replace Nth Occurence Of String In Each Line Of A Text File?

May 20, 2010

I have large text files with space delimited strings (2-5). The strings can contain "'" or "-". I'd like to replace say the second space with a pipe. What's the best way to go?
Using sed I was thinking of this:

sed -r 's/(^[a-z'-]+ [a-z'-]+) /1|/' filename.txt

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Programming :: Error During Reading A File Line By Line In C?

Mar 6, 2010

I have a code over there. It reads a line from file and converts contents of it to double.

Code:
/*
* fileRead.c

[code]...

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Programming :: C: Segmentation Fault When Freeing Allocated 2D Array?

Jun 1, 2011

I know that seems to be a common question, but information from the web does not So problem is in the title.

Here is what I do:

First I declare the pointers.
Code:
double **rijx,**rijy,**rijz;
Then I allocate the require memory.

[Code]...

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Programming :: Local Dynamically Allocated Array In Fortran?

Oct 19, 2009

I (my friend) have a fortran program with the code along the following lines:

Code:

SUBROUTINE NY
REAL, DIMENSION(4000,4000) :: a, b, c
...
RETURN
END SUBROUTINE PARAMETERS

The problem is that the huge matrices are retained in memory even after the subroutine ends. Is there an easy way to declare the arrays in a sort of dynamic way, like they were in the following C example?

Code:

void ny(void) {
double a[4000,4000];
...
}

I mean in the C example the memory is released as soon ny() exits.

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Programming :: Reading From Text File In Bash?

Nov 8, 2010

I need to Read a path of a file witch is written in Text file i used this

Code:

FILENAME=$1
while read line
do
echo $line
done < $FILENAME

it worked and showed me the Line witch was written in my file but now my problem is how am gonna use that line as a path i mean for example if am gonna execute a linux command on that file like dpkg -i /path/to/the/file how am gonna export it from The $Line variable and use it after the command.

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Programming :: Read Any Given Maze.txt Into An Internal Dynamically Allocated Array Of Strings?

Apr 26, 2011

I am looking for an easy way to convert any given maze.txt of any size to a internal array of strings(dynamically allocated). Important is that dimensions of the maze (row, col) shouldn't be written by the user instead they have to be somehow read from the file. This is not my homework assignment! It is a small part of a project that i never dealt with. I never read files to C string.... I made it for specific maze dimensions, but want it to work with any given .txt file.

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Programming :: C Define Char* Array With Calloc?

Mar 6, 2011

This works for "char" but i need "char*",how do I do it?

Code:

char* tk = (char*) calloc(ctk+1,sizeof(char*));

Error when I use it:

Code:

error: invalid conversion from har* to har

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Programming :: Pass A Char* Array As A Function Paramter In C++?

Jan 27, 2011

I have the following char* array

Code:
char* chrarray[] = {"Hello","LinuxQuestions"};
and I need to pass it into a function, how should I define my function in the header file?

[code]....

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Programming :: Print A Range Of A Char Array Without A For Loop?

Nov 6, 2010

Program in CSay I have a char array of 1024 bytes called buf1.But I only want to print the chars in index 0 up to index 30. I know I could do this with a for loop. But is there any other way? What about maybe storing from 31-1024 to another char array say buf2 with strcpy and somehow popping 31+ out of the buf1 char array?

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Programming :: Delete Line Of Text From Text File Via Shell?

Jan 13, 2010

I have to delete a certain line of text from the a textfile via ubuntu's shell scripting.I have done research, and it seems that most people advocate the usage of sed /d option. sed makes does not edit the text file. Hence, most options I discovered involved the use of a temporary variable/textfile and then overwriting the old file with the temporary new file. Is there anyway whereby I can bypass the use of temporary storage containers? I hope there is any magical combination of commands to edit the file directly.

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Programming :: Bash: Split A Text File Into An Array?

Sep 18, 2010

I have a file (called twitterstatus.tmp) that looks like this:

Code:

<status>
<id>24854489768</id>
<text>Are we gonna ride the sun home?</text>
<id>55266987</id>

[code].....

How could I feed this into an array, with each element containing everything between the <status> </status> tags?

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Programming :: String Format - Create A Text File ?

Feb 3, 2010

I am using C. I have a fuction that returns a string

Code:

I need to format this string so that I can create a text file like so:

So I'm trying:

Code:

But I get errors like:

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Programming :: String Search In Text File Using Visual C++

Jan 25, 2010

im tryin to make a tool in visual C++ which will take an input string through a text box,then it will compare tht string with a text file containing data and display the matched results in list box.

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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:

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Programming :: Perl - Delete Line From Text File With Duplicate Match At Beginning Of Line

Apr 1, 2009

Was wondering if any perl guru's could help me with a quick log file adjustment. I have a text file that looks like so (tabs and newlines are revealed so you can see what separates the data):

There are maybe 100 lines of text in this file at any given time. I need to delete all duplicate lines only looking at the first bit of text prior to the first tab. It doesn't matter which one gets deleted as long as there are no two lines that begin with that same text at the beginning before the first tab. So in this example, either the fist line "1234" or the last line "1234" would need to be deleted. I already have code in my script that opens the files - I just need the code to read the text into an array and the part that would find matches based on the above criteria, and make the deletions.

If it would be easier, I can even do a system call and use SED (v4.1.5) and/or AWK (3.1.5) instead.

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Ubuntu :: Bash - Putting String In File?

May 28, 2011

OK I have a simple script that does:

Code:
# Create temporary file:
pwFile="~/Tmp/temp.cnf"
echo "$password" > "$pwFile"

But I get an error message:

Code:
~/Tmp/temp.cnf: No such file or directory

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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?

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Programming :: Add Text Before Line Number In Text File?

May 3, 2010

a sed command to add a text before line number in text file? I have text file with 500 lines, and i want to add 3 more lines with text after line 300, OR before line 302, isn't no problem.

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