Programming :: Copying An Array Of Structs To New Variable?
Jun 27, 2011
I had a question about threads and mutexes recently answered and a members' answer sparked a different problem.'Nominal Animal' in the post mentioned said I should hold a mutex only long enough to copy my data to a temporary variable and then output by reading that temp. Here's some code on this. I must be copying the array of structs wrong because when the gui thread reads the temp copy, I end up with lots of garbage. Even running through gdb verifies that different data is in the temp array-copy than in the original.How do I go about copying this array of structs to another variable correctly in the gui thread?
Code:
typedef struct
{
[code]....
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May 3, 2010
I am having a little trouble with a Bash shell script that I am working on. It is intended to read the information out of a gedcom genealogy file and determine who has lived in a particular area and output a report based upon who lived in a given area (like the different sections of a bygdebok for example). I am having a number of issues.
1) I can't seem to figure out how to get a variable to work as the index of an array. For example, I am trying to use the variable $individual to count which individual is being read in from the .ged file, and once that is figured out, next I will read in the individual's name, so I would like to create an array of names using the variable
Code:
$individual
as the index of the array. However, if I try the code
Code:
name[$individual]=$lineoftext;
[Code]....
I included only the last few lines of output as to not take up too much space because the output goes on forever, but you get the point from the example. This output has nothing to do with what the final output of the program is intended to be like. It is merely a test to prove that the 2 variables in question are getting their date loaded in properly.
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Jul 22, 2011
I'm reading "OReilly Learning Perl 5th Edition", and there are such words:Code:You can use an array element like $fred[2] in every place? where you could use any other scalavariable like $fred.At the bottom of the page, it explains the ? like this:Code:The most notable exception is that the control variable of a foreach loop, which you?ll see later in this chapter, must be a simple scalar.Since Perl has the save-and-restore mechanism for the control variable, why an array element can't be used as the control variable
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Jan 27, 2011
As subjected I have this warning message code...
How can I get rid of this warning message?
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Jul 22, 2010
What I'm trying to do: write a script that will list all the directories in a given location. Ask the user to enter a number corresponding to the location of the directory in the list, and then moving into that directory.
I have written a script to do this, but it only works when I run it as: <user>$program_name and the script runs in a sub-shell. But, when it is run in a sub-shell, the changes made by the script go away after the script ends.
When I run it as:
<user>$. program_name
and the script runs in the current source shell, I get an error:
bash: cd: /home/dev/Project/dirname: No such file of directory
Code:
IFS='
' read -d '' -a ArrName < <(ls ~/Projects)
read filenumber
cd $HOME/Projects/${ArrName[$filenumber]}
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Mar 6, 2011
I am trying to dynamically delete and add information into the array "blah"
Code:
int blahsize = 1;
char** blah = (char**) calloc(blahsize+1,sizeof(char*));
Adding information:
Code:
blah[1]=stuff1;
blah[2]=stuff2;
code....
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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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Aug 21, 2009
I'm trying to read content of file to variable and use this variable in for loop. The problem is, when I have c++ comment style in file - /*. Spaces in line are also interpreted as separated lines.
For example:
Code:
Changing $files to "$files" eliminate these problems but causes that whole content of variable is treated as one string (one execution of loop).
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Apr 7, 2010
my script has a variable which comes in the form +00.00 +0.00 -00.00 or -0.00 (the numbers can be any in that form) for any that have a + symbol I need to remove the +, but if it has a - symbol it needs to stay.
i need to make a new variable with the string from the old variable btut without any plus sign. I have tried a lot of different ways with no success, each thing I tried either left the + or removed the entire string. I think this should work but doesn't
foo=+12.40
bar=${foo#+}
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Apr 25, 2011
how I can search within a variable and assign the results to a new variable. I'll use the following as an example -
cars="Audi BMW Cadillac Chevy Dodge Ferrari Ford Mercedes"
list=`echo ${cars} | egrep -o '<A?+|<C+'`
with the echo command I get the following output assigned to list -
A
C
C
What I'd like to get for output is -
Audi
Cadillac
Chevy
how I could do this regardless of upper/lower case letters?
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Aug 9, 2009
I'm writing a PHP program. I've encountered a problem; in the following code I try to pass $_POST['delete'] which is an array as the value of a hidden input to some form, but it doesn't do so.there's something wrong with converting PHP array into HTML array. I'm sure that $_POST['delete'] is not null and is a real array.
echo '<input type="hidden" name="delete[]" value="'.$_POST['delete'].'" />';
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Aug 2, 2009
Ive been using linux for a while but I am just getting into shell scripting, im currently trying to get a simple script for finding and copying files powered by the command:
Code:
This works fine from the command line but when put in a script such as:
Code:
Code:
with the keyboard inputs for $fc1 and $fc2 being *.doc and ~/test respectivly. The only problem i can see is the xargs -ivar "var" part possibly needing $var to be defined?
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Apr 28, 2010
included shell script inside c program, and i wanted to assign the value of c variable to shell variable..Can any one please suggest me how to do it?
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May 26, 2010
(I am using vector() and matrix() functions from "Numerical recipes in C".)There are 100 numbers to be stored in 2D array of 10 rows and 10 columns.100 numbers are stored in a 1D array.I get "segmentation fault" at the line indicated in the segment of my code below:
Code:
:
:
#define size 100
#define nl 1
[code]....
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Jun 20, 2010
I looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.
#!/bin/bash
addelementtoarray()
{
local arrayname=$1
[code]....
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Mar 17, 2011
This loop is part of a bash script which takes multiple arguments.
Code:
for ((i=1;i<=$number;++i)) ; do
offset=$(($i+5))
[code]...
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Mar 27, 2010
I wonder why arrays in the C programming language are pointers to the first element of the array, not the first element of the array itself?
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Dec 4, 2010
i want to pass variable in mysql qyery in c programming
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Sep 13, 2010
I'm having trouble copying a directory from one place to another in my build.xml file. I need to copy an image directory from the base directory (or root directory) to the dist directory so that it can be included in the jar file when I'm done compiling my java files.
This is my base directory:
drwx------ 1 enrique enrique 4096 2010-09-13 21:19 build/
-rwxrwxrwx 1 enrique enrique 1861 2010-09-13 22:17 build.xml*
drwx------ 1 enrique enrique 264 2010-09-13 21:19 dist/
drwx------ 1 enrique enrique 8192 2010-09-11 19:30 img/
drwx------ 1 enrique enrique 4096 2010-09-13 21:18 src/
The build/ and dist/ directories are created when I compile my java files from the src/ directory and img/ is where i have all my .png files which are needed for the program to display correctly.
Now for my Ant file: build.xml:
<?xml version="1.0"?>
<project name="PokerFiles4" default="compile" basedir=".">
<!-- Setting properties -->
<property name="dir.src" value="src"/>
[code]....
how I can get my img/ directory in the jar file would be appreciated, I'm writing a poker application to generate statistics for poker hands post-flop, and on the turn, like pot odds, hand odds, poker odds, outs, etc, I got the gui working, all I have to do is get the buttons in the app working, but all my classes are written and are working fine.
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Oct 17, 2010
I am a dummy in C programming. I have a problem with copying the array of 64 elements of unsigned char to array of 8 element of uint64_t. For example:
unsigned char p[64]
uint64_t Data[8];
memcpy (&Data, &p, 64);
I am not sure if it is right. Please help me. Thanks a lot.Moreover, do both p and Data have 64 bytes?
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May 18, 2009
I am working with DM355 target board. Here we record. The video coming from IP cameras. Now I have to write c program for copying. The recorded avi files with date and time to NAS server using scp. I wrote a script to copy single file to NAS server.
#!/bin/bash
DATE=$(date +%Y%m%d_%H_%M_%S)
mv Camera1.avi Camera1_$DATE.avi
scp Camera1_$DATE.avi root@192.168.1.4:/root/test/
mv Camera1_$DATE.avi Camera1.av
But I have to write c program for copying multiple avi files with Date and Time to NAS server.
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Sep 24, 2010
This array is supposed to contain 12 elements (names of the month) What I want to achieve is that depending on some user input (a number 1-12) a full name of one of the months will be displayed, eg.
Code:
scanf("%d", &month);
printf("The month is %c", months_names[month]);
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Feb 18, 2010
I am trying to create an array containing all ASCII characters, how do I create one:
Code:
#!/bin/bash
CHARLIST=( a b c d e f g h i j k l m n o p q r s t u v w x y z
[code]...
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Oct 29, 2009
I've got a problem...
a[0] = 22
echo $[a[0]]
echoes 22 - that works fine
[code]...
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Nov 10, 2010
Code:
function forcd
{
[code]...
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Jul 14, 2010
I'm running Linux version 2.6.33.4 on an ARM9 and can successfully copy directly into the framebuffer using the command:
Code:
cat /usr/myfile.bin >/dev/fb0
I converted myfile.bin from a 640 x 480 x 24 bmp.
What I'd like to do is to have the ability to dump .bin image files directly into the framebuffer from a C program without shelling out to a cat command.
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Dec 23, 2010
I am working on an application in Motif and C++, which uses an XRT Table. With the XRT Table being an infrequently used product, it is hard to find good documentation on it, and one area in particular is sorely lacking... a good explanation on how to copy text from the table to the clipboard used by other X11 applications. I've come across an example application that demonstrates how to copy text to the clipboard, but I cannot seem to merge that knowledge with what I'm provided with the XRT Table API. Does anyone have any knowledge in using the XRT Table, and in particular, with copying selected fields within the table to the clipboard?
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Apr 4, 2010
I have a text file from which i read a number of names with their lengths at the run-time.Now i want to created a char array having the length and name as already read from the text file at the run-time. There is no compilation involved. Every thing is happening at the run-time. I tried using STL like map along with malloc but i am unable to name an array at run-time. I can keep some type of mapping with previously created arrays
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May 9, 2010
I've searched around and can't find out how to convert a string ( like "12345" ) into an int array ( x[ 5 ] = { 1, 2, 3, 4, 5 } ; ).
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Jul 9, 2010
i am trying to represent alphabet into a array, and then i can count the frequency
for example
array[a]=0
array[b]=0
but i find the index of the array seems to be
array[1]=0
array[2]=0
I was try this way get the ascii for them, actually I have done this in java and it is simple.
something like this format
array[ascii{a}-ascii{a}]=0
array[ascii{b}-ascii{a}]=0
I have done a lot of searching , but cannot get what I want.'%d' "'$char" like this would not work.
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