C is a general-purpose programming language

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Newbie C programming question [closed]

Can anyone explain why the output of this code is 2? I mistakenly thought it was 3. int array[] = {1, 2, 3}; int *address = array; array[0] = 2; array[1] = array[2]; array[2] = *address; ...
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0answers
39 views

Ubuntu 14.04 freezed when too much memory in malloced

I am trying to run a C program which mallocs the memory as per the input given by user. Whenever I input something as big as 1000000000 rather than returning NULL value, my Ubuntu 14.04 machine ...
0
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1answer
231 views

Compiling C code for ARM processor on Ubuntu 12.04

I am compiling my simple "Hello world" C code using the following command: arm-linux-gnueabi-gcc-4.4 test.cpp -o test It generates an error: arm-linux-gnueabi-gcc-4.4: error trying to exec ...
1
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1answer
178 views

Getting time in ubuntu [closed]

#include <sys/time.h> #include <stdio.h> int GetTime() { struct timespec tsp; clock_gettime(CLOCK_REALTIME, &tsp); //Call clock_gettime to fill tsp fprintf(stdout, ...
0
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1answer
93 views

ALSA prgramming in C

I'm using a C program that help me recording from my audio device here is the code : /* Use the newer ALSA API */ #define ALSA_PCM_NEW_HW_PARAMS_API #include <alsa/asoundlib.h> int main() { ...
-1
votes
1answer
74 views

unfamiliar codes in iw [closed]

Recently I am trying to understand how the codes in iw works. In iw.h, I encountered the following: #define __COMMAND(sect, name, args, nlcmd, flags, idby, handler) \ static const struct cmd ...
1
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0answers
626 views

Cmake fails while configuring OpenCV

I'm trying to buid OpenCV and use it in Qt. I have installed all required packages for OpenCV and Qt, after that I tried too run cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ...
2
votes
2answers
707 views

ls system command not showing terminal colors

I've just been fooling around with some code in C, an example of a really basic program is as follows which just, obviously, lists the directories using the ls system command. #include ...
2
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0answers
192 views

gstreamer pulseaudio echo cancellation

I'm implementing a voip application using gstreamer, i use the example of the rtp in the plugin-good! i want to implement echo cancellation, i couldn't use the speex echo canceller with gstreamer ...
1
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0answers
14 views

Library for Audio files

I have written a project in Matlab, using some signal processing (fft,convolution,PSD etc), and I have to put it on ubuntu , for that I need to write a project in C, and I was wondering if there ...
0
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0answers
27 views

How to access terminals with their names through C program?

How to access a terminal through its name in C program? I can only access the current terminal in which I am running the program through system() function. I want to access multiple terminals ...
0
votes
1answer
713 views

Error running C program compiled with Geany IDE Error Code: 127

I installed Geany IDE via Ubuntu Software Center. Wrote a hello world prog in C and it compiled successfully but when i tried to run it, it gave me this error: ./geany_run_script.sh: 5: ...
1
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2answers
2k views

Are there drivers for OpenGL 4.3 for [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] (Ubuntu 14.04)

I want to be able to do opengl4.3 c/c++ programming, the [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] should be able to support it, I just don't know what drivers I have to install Also I have ...
13
votes
1answer
14k views

fatal error: sys/cdefs.h: No such file or directory|

It has been weeks that i am trying to use Code::Blocks IDE to program Atmega16, however, i am hindered by the following error while compiling/building the program in C::B ...
0
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1answer
2k views

How to enable c99 and c11 on gcc?

When I compile the following code it gives compilation error that error: ‘for’ loop initial declarations are only allowed in C99 mode for(int i = 0; i < 5; i++) and to compile your code use ...
1
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0answers
53 views

'__FDELT' and '__FDMASK' not declared in this scope (posix_types.h not included)

I'm running Ubuntu 12.04 LTS, 64bit version. I'm getting the following error when compiling a C++ program: ../elements/userlevel/socket.cc:477: error: '__FDELT' was not declared in this scope ...
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0answers
58 views

Calculating postfix expressions using stack [closed]

What is wrong with my calculate function? All other functions work fine but when I try to calculate a post fix expression, it adds some weird symbols to my stack. void push (char operand){ ++top; ...
0
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1answer
20 views

Upgrade restart fail

Upgrading from v13.04 to 13.10, all went well until "restart to complete"--screen did not come up for restart (Nvidia GeforceGTX650). I tried various suggestions, but now cannot get even Grub menu on ...
7
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6answers
693 views

Source code formatter/indenter

I'm using Ubuntu 12.04. I do not have any root or sudo privileges as this is a company machine. Is there, in a normal installation of Ubuntu 12.04, any terminal program that I can use to turn ugly ...
-1
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1answer
102 views

To check code execution flow of C program in ubuntu [duplicate]

Is there any software available in UBUNTU 13.10 to check line by line code execution of C programs.
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0answers
45 views

Open NFC Compilation - g_pNALBinding error while compiling microread/hal_*

for generating the server application using AARDVARK, to access the NFCC, when I am entering make command in this directory: core/porting/linux/client_server/server/microread/hal_cc_client . ...
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0answers
29 views

Installation failed for API

I'm developing an app for sending OSC messages working through the outlet port 4444 and I am using a C API call Liblo. Project page: http://liblo.sourceforge.net Normal install it by running the ...
1
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1answer
164 views

Kindly explain me this code of increment decrement operator [closed]

Following is the code that I run in ubuntu 13.10. Code:- #include<stdio.h> main() { int i=10,j=10; i=i++ + ++j; printf("i=%d j=%d\n",i,j); j=++i + j++; ...
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0answers
80 views

Capture hrtimer interrupts with linux kernel module .. possible?

I would like to be able to 'capture' an hrtimer interrupt with a linux kernel module and replay the interrupt at a later period in time. Any thoughts on how to go about doing this? Use case: A ...
0
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2answers
240 views

How do I get the pcap lib on Ubuntu?

I have a programming assignment where I need to use the pcap lib. #define _BSD_SOURCE #include <stdio.h> #include <stdlib.h> #include <string.h> #include <pcap.h> // <-- ...
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1answer
668 views

Compiling a C file through Gedit extrernal tools

Is there any way to compile and run .c files by using a shortcut key using gedit? I know its possible for java and C++, and I read somewhere that it is possible to do so using scripts in external ...
0
votes
1answer
93 views

What is kernel modding? [closed]

I want to take a dip in customizing linux kernel. As it's evident that linux kernel can be modified according to our specific needs. My questions are: What is kernel modding? How to perform that? ...
2
votes
3answers
838 views

IDE/Compiler for C or C++ Programming [duplicate]

Is there any software that supports on C or C++ Programming? Then, if it so, how to run, compile or debug your own code to display its output via terminal(linux/ubuntu) or cmd(windows)
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0answers
117 views

libipq not supported in Ubuntu 12.04 LTS

I have the requirement of altering packets as a part of my University's research project and came across two libraries. which are libnetfilter_queue and libipq which is the deprecated version. ...
0
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0answers
20 views

Int system call and 'int' within C syntax

I'm learning about kernels and I was curious if the int system call(in our case, in Linux) has any connection with the declaration of an integer in C and C-based languages. int n; Is an integer ...
1
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1answer
221 views

How to let a user execute a script owned by root? Setuid doesn't seem to work anymore

I have some bash scripts that I use with the user 'root' to manage iptable rules. The problem is that I want these things at the same time: The script must be owned by root Permissions must be 700 ...
1
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2answers
56 views

Compilation Help on Ubuntu 13.10

I have recently gotten into programming this is a small C code I started on. I am using Ubuntu 13.10. int main(int argc, char *argv[]) { puts("Hello world."); return 0; } Whenever I try ...
0
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2answers
6k views

how to compile a c program that uses pthread.h?

I'm a beginner and I'm new to Ubuntu. I just installed it and want to run a C program. I have no idea what platform to use or where to write the code. I need to use pthread.h header file in the ...
0
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0answers
353 views

Syntax highlighting not working in Vim?

Can someone help me out. I recently installed Vim for C development and would like to get the syntax highlighting on. I've tried various commands including "syntax on" but none seem to be working. I ...
4
votes
2answers
3k views

Installing a comprehensive LAPACK implementation under Ubuntu

I would like to ask how to properly install a comprehensive LAPACK package as e.g. is offered by the Gentoo package 'sci-libs/clapack' within a Ubuntu environment. I am not talking about atlas here, ...
2
votes
1answer
264 views

make file error, trying to install intel power gadget

I hope another Ubuntu user has tried to run Intel power gadget and knows what problem I am having. I am trying to install the power gadget, running the make file i get an error message: ...
1
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0answers
17 views

How to back up a folder in the C root file in XP.. only place the folder can be [closed]

I have a folder directly under C:/ that can only be located there in order to work. I have to back it up daily, I was hoping Ubunto would do that, but it keeps saying the file must be elsewhere (My ...
2
votes
1answer
484 views

Generating core files on Ubuntu

Recently I've been trying to enable core dumps on Ubuntu. I made a simple program, that would crash (it writes some data out of array). At first, core dumps weren't generated. This was because ulimit ...
2
votes
1answer
173 views

Which package to install to use C/C++ compiler with Eclipse

I want to develop C/C++ applications using Eclipse: should I install using sudo apt-get install build-essential or sudo apt-get install gcc
4
votes
1answer
4k views

Where's my /usr/include/sys directory?

I recently upgraded from Kubuntu 12.04 to 13.04, a complete reinstall. Using gcc 4.7.3. I compiled some programs to discover there is no /usr/include/sys directory. That is, types.h, stat.h, etc, ...
0
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0answers
602 views

Sending and reading HTTP request through socket for USB connected ethernet device

I'm writing a simple C program to send a HTTP request to a USB modem device, which is loaded(cdc_ether) and has the 192.168.0.144 ip address with ethx interface up on a Ubuntu machine. I am able to ...
-1
votes
1answer
259 views

List containing functions used in C/C++ for Ubuntu's GCC/CC? [closed]

I'm new to programming. What I want is to know as much about programming as I possibly can, and start off with what people say is a good start: programming with C. I have this PDF called "Teach ...
4
votes
1answer
2k views

How to to use gcc with LAPACK and external header file?

I am trying to run a C program that uses an external header file with LAPACK AND LBLAS libraries, every time when i try to run the program i get an error lapack not found, How do i properly use the ...
1
vote
1answer
2k views

Error: ‘strlen’ was not declared in this scope

I am trying to compile several third-party software from source code (i.e. zchaff, argosat) and get errors such as: Error: ‘strlen’ was not declared in this scope Error: ‘strcmp’ was not declared in ...
0
votes
1answer
75 views

Including external Header files in programs [closed]

Being using Windows for most of the time and deciding to start programing in ubuntu,I would like to know how I can include the external header file in my programs.Do I download them manually and paste ...
0
votes
1answer
471 views

how to compile a C code to call an octave function and make the GUI using GTK+2

i am trying to call a octave function from C code but the problem is that when why run this command in octave mkoctfile --mex addition_GUI.c error occurs addition_GUI.c:1:20: fatal error: gtk/gtk.h: ...
0
votes
1answer
326 views

Where is my glut?

I try to compile c program : #include<GL/glut.h> #include<GL/glew.h> #include<GL/gl.h> #include<GL/glu.h> void main(int argc, char **argv) { glutInit(&argc, argv); ...
0
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1answer
171 views

Mpi file not recognized?

I am trying to compile some mpi files on Ubuntu I installed the library using this code sudo apt-get install libcr-dev mpich2 mpich2-doc and tried to compile this simple hello world program /* C ...
0
votes
1answer
127 views

My ubuntu can't kill the process which occupy too much memory?

When I tested it, my computer tried it best to provide the most memory to my program.. And my computer crashed.. But I remembered that ubuntu will kill this process if it needs too much memory ...
0
votes
3answers
614 views

How to view the list of c library functions?

I'm a newbie in Linux programming. I found that the way to view the list of system calls in Linux via command-line is: man syscalls But now I want to view the list of c library functions, how can I ...