I've started programming in c recently . following are the details about scene:
* vim is editor and program is compiled in gcc whenever a program involving math function appears it gives error i.though math.h is included in header file compiler complains about it it gives error of unrecognized function that math function like sqrt, etc question is how to connect math.h to a program.
I've created 3 files: swap.h and swap.c then make static library from it
Code:
Then I write 2 program to test this library: test_swap.c and test_swap.cpp
I compile
Code:
What's wrong with this in C++? And how can I make a library that can work both for any C and C++ program?
Here the source code
Code:
Code:
Code:
it possible to access main program function from dynamicallyinked library in c language?For example:main.c:
Code:
#include<stdio.h>
void func()
[code]...
I'd like to get path of one library to link it dynamically in my program. Probobly the best way would be to add macro to my configure.ac file.
View 2 Replies View RelatedIs there any equivalent of WaitFOrMultipleObjects on Linux?
I was finding a cross Platform library that allow you to run another program from your C++ application. I found POCO but it does not support functionality like WaitFOrMultipleObjects for both (linux and windows). I tried boost Process but its not official till now.
Code:
Why are basic math problems returning 0? I know that Integers can only hold whole numbers, and it had the exact same problem when I used floats. I am using GCC 4.4.4.
I've been trying to ssh out of my home network to school computers and I keep getting:
ssh: connect to host sage.math.washington.edu port 22: Connection timed out
I've tried this on my machine (running Ubuntu 10.04) and on a windows 7 machine (using putty). I have been successful ssh'ing to this machine using either of the laptops from every other network I've tried, so I'm pretty sure it's something about my home network.
When I try to compile this code:
#include <math.h>
int main (void) {
double x, y;
x = 2;
y = sqrt(x);
return 0;
}
With the command:
$ gcc test.c
I got this message:
/tmp/cc5QZmCN.o: In function 'main':
test.c:(.text+0x16): undefined reference to 'sqrt'
collect2: error: ld returned 1 exit status
I tried this on a fresh jessie install. I have the same problem on wheezy.
Here is my situation:I have a series of .plt files that are geared for a device that has it's xy origin at the lower left of the paper however some devices use the center of the paper as it's origin in a piped shell script how can I convert this file to a center origin plot file?Here are some knowns: the existing file always Lower Left 0.0 the existing file max xy is the page upper right x.x the desired output file must have it's 0.0 at the exact center of page (page size will vary). Ideas: Based on the sample files included maybe use PU and PD as the triggers for inputs to be calculated as any other commands have nothing to do with coordinates.
View 14 Replies View RelatedI wrote a perl script to feed information to our load balancer:
Code:
#!/usr/bin/perl
#
use strict;
#use warnings;
#
#
use Net::SSH::Perl;
my $user="bluethundr";
my $pass="secret";
my $dir="$ENV{HOME}/data";
open (LBVSERVERS), '<', "$dir/lb-vserver" or die "Couldn't open file: $!";
open (CSVSERVERS), '<', "$dir/cs-vserver" or die "Couldn't open file: $!";
my $ssh = Net::SSH::Perl->new("10.50.0.1");
$ssh->login("$user", "$pass");
print " .....
I need to be able to install the Math::Pari CPAN module in order to accomodate the Net::SSH CPAN module. The prereqs are installed:
Code:
cpan> install Net::FTP
Net::FTP is up to date.
cpan> install LWP::UserAgent
LWP::UserAgent is up to date.
But when I either try to install or force install Math::Pari this is what I get:
Code:
cpan> install Math::Pari
Running install for module Math::Pari
Running make for I/IL/ILYAZ/modules/Math-Pari-2.01080604.tar.gz
Checksum for /home/bluethundr/.cpan/sources/authors/id/I/IL/ILYAZ/modules/Math-Pari-2.01080604.tar.gz ok
Math-Pari-2.01080604/ .....
CPAN.pm: Going to build I/IL/ILYAZ/modules/Math-Pari-2.01080604.tar.gz
Did not find GP/PARI build directory around.
Do you want to me to fetch GP/PARI automatically?
(If you do not, you will need to fetch it manually, and/or direct me to the directory with GP/PARI source via the command-line option paridir=/dir)
Make sure you have a large scrollback buffer to see the messages, or 'tee' the STDOUT/STDERR to a file.
Fetch? (y/n, press Enter) y
Getting GP/PARI from ftp://megrez.math.u-bordeaux.fr/pub/pari/unix/
Cannot list (Failed to establish connection.
): at utils/Math/PariBuild.pm line 319, <STDIN> line 1.
Can't fetch file with Net::FTP, now trying with LWP::UserAgent...
You do not have LWP::UserAgent and/or HTML::LinkExtor installed, cannot download, exiting...
I am trying to map the coordinates of a grid.
Code:
R=7 # number of rows (lines)
C=6 # number of columns
X=200 # initial horizontal location
Y=100 # initial vertical location
[code]....
I'm reading about shared, static, and dynamic libraries. What is SDL? Is it static, shared, or dynamic?
I always thought a library would be a lot of .h and .cpp files compiled separately into .o files and then if you compiled your own program you could use the -l parameter to link the library and it was all compiled together. Now I'm not so sure.
I don't even see any SDL .cpp files in my system anywhere. All I have are lots of SDL .h files in /usr/include/SDL and I don't really understand the code in them.
I'm making a wild guess here: SDL is a shared library. SDL itself is NOT compiled into my program, therefore SDL must be on any system my program tries to run on. When I compile and link SDL all it needs is the header files to know what SDL function and objects it can use. And then on every system it uses an already compiled SDL shared library thingy somewhere.
So... where is that part of SDL? All I can find are header files.
I'm thinking the advantage of shared libraries is that someone could say update SDL on their own system and take advantage of the new features without having to download new executables with the new version of SDL compiled into them for every program that uses SDL.
So if I'm making an editor and a game engine and they both use a lot of the same .cpp and .h files that I wrote and I'm tired of updating one and then the other and I need to turn them into a library, then a shared library might be kind of a silly solution. I could just make a static library. Right? Because it's not SDL. Nobody else is ever going to use this library.
How can we convert a dynamic library (filename.so) to a static library (filename.a) using gnu gcc . Can we get a static library form a dynamic library . I saw a few post in which the conversion form a static library to a dynamic library is mentioned but, unfortunately, not the other way.
View 4 Replies View RelatedI was unable to compile a program that used libicu42 on Ubuntu 11.04, because Ubuntu 11.04 has only libicu44 and does not have libicu42 installed. So during compile time I used g++ prog.c -L mylib/ to compile the program. mylib had libicu42 (This library is a shared library and has the .so extension). The program compiled successfully, but when I tried to run it, it failed and complained that it did not find libicu42. So I had to manually install libicu42 in /usr/lib. Then the program worked.'ldd prog' revealed that it looked for libicu42 in /usr/libWhat was the point of specifying the library path using -L, if the compiled program looked for the library in /usr/lib? It's almost like it was just to satisfy the compiler.
View 3 Replies View RelatedI am trying to add some functions to a Postgresql database. The functions use a shared library which they think is: /usr/lib/pgsql/postgis-1.4.so They say: "ERROR: could not load library "/usr/lib/pgsql/postgis-1.4.so": libgeos_c.so.1: cannot open shared object file: No such file or directory"
I cd to /usr/lib/pgsql/ and do an ls. postgis-1.4.so is there. libgeos_c.so.1 is as well (and it's in /usr/lib/ )
Both the files seem to exist. I cannot copy either of them (cp says "cannot stat '[file]': No such file or directory".
I need to write program (preffer Python) to change range for users. Does anyone know some library which can help me to do that? Maybe someone has written program like that?
View 5 Replies View RelatedI'm tring to run AMDOverdriveCtrl, since they don't have an RPM file for Fedora i tried to compile from source i followed the instruction in the readme files run the make command
Code:
% make
g++ -mwindows -s -pthread -lwx_gtk2u_richtext-2.8 -lwx_gtk2u_aui-2.8 -lwx_gtk2u_xrc-2.8 -lwx_gtk2u_qa-2.8 -lwx_gtk2u_html-2.8 -lwx_gtk2u_adv-2.8 -lwx_gtk2u_core-2.8 -lwx_baseu_xml-2.8 -lwx_baseu_net-2.8 -lwx_baseu-2.8 -ldl -o./Release/AMDOverdriveCtrl ./src/CFanSpeedPanel.o ./src/COvdrSettingsPanel.o ./src/CFanControlPanel.o ./src/CColorTempPanel.o ./src/BezierMath.o ./src/Color.o
[code]....
and tried to run the application, and i get this error message
Code:
$ AMDOverdriveCtrl
Fatal Error: Mismatch between the program and library build versions detected.
The library used 2.8 (no debug,Unicode,compiler with C++ ABI 1002,wx containers,compatible with 2.4,compatible with 2.6), and your program used 2.8 (no debug,Unicode,compiler with C++ ABI 1002,wx containers,compatible with 2.6).
I am installing a program on a server as a non-root user. Specifically it is tmux 1.5, but this should apply broadly to all locally installed program in my opinion (I mention the program name in case this problem ends up not being my own error).
The program requires me to install some dependent libraries (e.g. libevent and ncurses). So, I installed them both locally since I do not have root access
cd $HOME/library/installation/folder
DIR=$HOME/local
./configure --prefix=$DIR
#... make ... make install
[Code]....
Ok, so this installs the program without problems into $HOME/local/bin, but if I run the executable: $HOME/local/bin/tmux , I get the following error:
tmux: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory
It would seem to me that the program cannot find the desired libraries, but the file libevent-2.0.so.5 does indeed exist in $HOME/local/lib as specified in the configure options. I am wondering how I can get the program to recognize the installed library in order to run. I tried putting symbolic links in $HOME/lib, $HOME/bin, and $HOME/local/bin, but none of these worked.
I have a jsp code. After executing that code, a Java program should be executed without refreshing the page. that is, my first page is a login page which is in jsp. After logging in the next page must be displayed which is a Java code. is that possible? Can we use applet for that?
View 1 Replies View RelatedI will have to code this. However I am lacking of time since I have too much to do. make a short code bash/dash to prompt the country with Zenity, then, get the PLS or m3u url and prompt with another zenity which radio to play. http://www.listenlive.eu/index.html
My code to get url's radio country.htm is:
Code:
How to make simple games (snake, pong... nothing too fancy). I have completed making snake and now want to be able to distribute it. I built it using C++ and wxWidgets so it would be multi-platform. I'm able to compile it and run it in both Windows and Ubuntu using g++. In windows, I was able to distribute it by putting a *.dll file in the same folder as the executable. However in Linux, I don't understand what I need to do so that it would run on any installation of Ubuntu out of the "box". When I build it and try to run it in a different installation of Ubuntu (which has g++) it gives me an error saying that a particular library file was not found and Getlibs fails to find that library file.
Is there a way to build a project with G++ so that all the dependencies are either packaged in the executables or copied into the folder....?
I'm trying to make one that has some sorts in it for now. I know you have to make a header file and a .cpp file. I'm using VC++(yes, I'm in school so windows in needed. I use Ubuntu at home I swear D if it makes a difference. What goes in the header file, how is the cpp file set up, and then where do I put the files once I'm done?
View 5 Replies View Relatedbluetoth library for c++
View 2 Replies View Relatedi have a code written in c..for which i was trying to create a gui using Gtk+.but now i want to use qt4 for the same purpose but native language of qt4 is C++. i have to do library binding for my C code to develop a gui using qt4.
View 5 Replies View RelatedI am trying to write a program that can get the times from files on a NTFS drive in Linux using the ntfs-3g library. I have installed the development libraries and source on my Fedora 10 machine. I can find the headers in the /usr/include/ntfs-3g directory but when i try and compile my program I am getting an undefind reference to ntfs_mount() call. I have the following in my link string
g++ -L/lib -o ProgramName -lpthread -lntfs-3g
I did a pkg-config --cflags --libs libntfs-3g and it said all i needed was the -L/lib -lpthread and -lntfs-3g.
To create a static library, or to add additional objectiles to an existing static library, I can use a command like this:ar rcs my_library.a file1.o file2.oBut how to add an existing static library to my own static library. I have created my own static library using the command above and want to link against the library libuuid.a (placed in /usr/lib/).
View 6 Replies View RelatedI jus found that #include<stdio.h> is not working with gcc and neither any function from the library like clrscr(); i found due to <stdio.h> is a windows lobrary file so its not come with linux. But I want to to know if I have to call any function from that library what should I do? Is there any way to install <stdio.h> in linux?
View 5 Replies View RelatedWhere are the definitions for C library functions located? It was just recently that I realized that header files don't actually define any functions, they merely include their prototypes.
For instance, stdio.h includes the following line:
Code:
This just means that the definition of printf() is located in another file. What file? Is there some kind of default shared object file that is automatically included during compilation?
Where is the location of the header files for the c++ standard library?
I assume that they were installed by gnu g++, please correct me if i'm wrong.
I'm running ubuntu 10.04 with g++ 4.4.
I looked in /usr/lib/gcc/i486-linux-gnu/4.4/include, but this directory contains only the following:
Code:
Which doesnt seem to include the really basic things like iostream, for example.
Where can I take a look at the header files for these standard c++ libraries?
I'm trying to learn how to cross-compile libraries (static and shared) and executables for the Blackfin + uClinux environment.At this point, I can successfully compile a stand-alone "Hello, world" but fail when trying to add a (static) library to the mix.Here's the source code I wrote:
Code:
#========== bar.h
void mytestfunc(void);
#========== bar.c
#include <stdio.h>
[code]...
Googling for this returns talks about "name mangling", but I don't know if this is what it is, and how to change the source/command to solve it.