Questions tagged [c++]
C++ is a general-purpose programming language.
792
questions
128
votes
5
answers
974k
views
What is a command to compile and run C++ programs?
I am new to Linux. I am using Ubuntu 11.04 and do not know how to compile and execute C++ program in it. I need to know the commands to Compile and Execute a C++ program in Linux.
user24989
46
votes
3
answers
124k
views
Where do I find the core dump in ubuntu 16.04LTS?
I have a C++ program that does what it is supposed to do, but there must be some problem with pointer, since it crashes at the end and creates a core dump. My problem is that I cannot find the core ...
- 895
35
votes
4
answers
97k
views
How to install gcc-7 or clang 4.0?
I want to try C++17 features and I want to install standard compliant compiler (preferably GCC). I'm totally new to Linux and Ubuntu and I simply don't understand a lot.
I tried to follow https://...
- 545
29
votes
2
answers
22k
views
How to build a simple chat using netcat?
I am currently working on a project and I have implemented a simple chat application using the netcat libraries.
The client is prompted to enter port number and the command
nc -l -p xxxx
where xxxx ...
- 1,477
28
votes
2
answers
32k
views
Installing and using universal-ctags instead of exuberant-ctags
How could I switch from exuberant-ctags to universal-ctags. I am using Ubuntu 16.04 LTS and
ctags --version reports
Exuberant Ctags 5.9~svn20110310, Copyright (C) 1996-2009 Darren Hiebert
- 573
27
votes
1
answer
267k
views
How to install g++ compiler?
I have tried the following:
sudo apt-get install build-essential
Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest ...
24
votes
2
answers
218k
views
How to compile C++ source code ("iostream.h not found" error)?
I do not want to discuss about C++ or any programming language!I just want to know what am i doing wrong with linux ubuntu about compiling helloworld.cpp!
I am learning C++ so my steps are:
open ...
- 1,076
23
votes
3
answers
6k
views
Is it possible to use Python with the Ubuntu SDK?
David Planella wrote in his answer to a question I posted that:
...the recommended way to develop apps for Ubuntu is the Ubuntu SDK.
So I installed it, but looks like the supported programming ...
- 10.8k
22
votes
2
answers
67k
views
Fatal error: gl/glut.h: no such file or directory
I'm attempting to write a program and I keep getting this error:
Fatal error: gl/glut.h: no such file or directory
I've read through other similar problems that people were having, and nothing has ...
- 221
21
votes
1
answer
44k
views
Where to install libraries manually?
I want to install SFML (a free multimedia C++ API) on my Ubuntu system, which basically isn't a problem. But I wanted to know where I should store the files.
I can see, that Ubuntu stores my C++ ...
- 720
19
votes
5
answers
15k
views
Run system commands from QML App
I want to run a system command from inside my application. It's suppose to run a command on a remote server using SSH. But that's not really the point. The point is that I don't know how to run any ...
- 630
18
votes
2
answers
46k
views
How to set Clang 9 as the default C++ compiler on Ubuntu 19.10?
how do I set Clang 9 as the default C++ compiler on Ubuntu 19.10?
I searched the internet, but nothing helped.
Thank you for answer :)
user1027802
17
votes
1
answer
23k
views
Installing clang 5.0 and using C++17
I have been trying for 3 days to install clang 5.0 on an Ubuntu 16.04 machine. I have tried various guides, but nothing seems to work. When I try to simply grab the latest from SVN and build/install (...
- 267
16
votes
2
answers
19k
views
clang++ cannot find iostream
Here is a simple code :
#include <iostream>
#include <algorithm>
#include <vector>
#include <functional>
#include <iterator>
#include <iomanip>
#include <cmath&...
- 531
16
votes
2
answers
50k
views
How do you find libraries (C++) in Ubuntu?
Sorry, this is such a beginner question, but I've recently begun programming with C++ on Ubuntu 12.10 and I've installed a few libraries I need to work with, for example PCL and I can't find them to ...
- 597
15
votes
4
answers
37k
views
How to install g++ 5.1 on Ubuntu desktop 15.04 64-bit?
I'd like to experiment with the new GCC 5.1 C++ compiler on Ubuntu.
So, I downloaded and installed Linux Ubuntu desktop 15.04 64-bit in a virtual machine.
Then, in the terminal, I entered the ...
- 153
15
votes
2
answers
4k
views
Can I act on the event that a window opens without polling?
I am trying to find a way to detect the event of a window (any window) being opened in Ubuntu 16.04
I would like to be able to detect the "window open" event and check if the opened window was my ...
15
votes
1
answer
13k
views
Compiling C++20 program that uses modules with Ubuntu 22.04
I'm trying to run a simple program:
import <iostream>;
int main()
{
std::cout << "Hello, World!" << std::endl;
return 0;
}
I've checked, and supposedly I've already have ...
14
votes
4
answers
12k
views
Receiving error while trying to debug in QtProject
I installed the latest version of the QtProject so now I can debug C++ code.
While trying to debug for the first time I got this error:
ptrace: Operation not permitted.
Could not attach to the ...
- 141
13
votes
4
answers
42k
views
Find version of development library from command line?
I installed the c++ boost development libraries using Ubuntu software centre. The problem is that it was quite a long time ago and I cannot remember where they are installed nor what version they were....
- 2,271
13
votes
1
answer
31k
views
How to add the ncurses.h to a C++ program compiled on gcc?
I am totally new to C++ programming on gcc. I wanted to add color to my text on the output on the console. Since there is no conio.h on linux, I researched and found that ncurses.h could do the trick. ...
- 482
12
votes
6
answers
100k
views
Can't execute .out files, getting permission denied
I have written a C++ program and complied it to produce a.out file. However, whenever I try to run it, I get Permission Denied. I read that we can use sudo, but I can't quite get it to work. I use ...
- 2,394
12
votes
2
answers
8k
views
Disabling C++11 in GCC 7.3
It seems like in Ubuntu 18.04, the default shipped g++ (version 7.3.0) runs in C++11 compatible mode by default. I am getting some errors in my old codes which are not C++11 compatible. I installed g++...
- 294
12
votes
1
answer
6k
views
How can I write a dynamically updated panel app / indicator?
I am trying to write some panel apps for ubuntu Mate.
I know C/C++, and SDL reasonably well.
I have seen the Mate-University panel apps github page, but i cannot get it to work properly / Im having ...
- 14.9k
12
votes
1
answer
22k
views
How to make Eclipse CDT's Linux GCC toolchain resolve C++ standard library headers?
In Ubuntu 12.04 LTS I installed the Eclipse CDT plugin and opened the new hello world project to just test everything out. When I was creating the project, I chose the only toolchain: "Linux GCC"
...
- 477
11
votes
2
answers
36k
views
How to compile C/C++ program with GStreamer
I'm trying to compile this code:
#include <stdio.h>
#include <stdlib.h>
#include <gst/gst.h>
int main (int argc,
char *argv[])
{
const gchar *nano_str;
guint major, ...
- 113
11
votes
2
answers
579
views
11
votes
3
answers
37k
views
Installing latest version of wxwidgets
I am attempting to install the latest version of wxwidgets via the terminal and followed these directions.
However, when I navigated to the folder /usr/include, a folder was created called wx-3.0-...
- 707
11
votes
1
answer
3k
views
False "application not responding" box is creating havoc with GDB
I'm trying to debug a C++ application using GDB and the Qt Creator IDE. Every time the debugger stops on a breakpoint, Ubuntu (v 17.10) thinks the application is frozen and issues the dialog box with ...
- 301
10
votes
4
answers
32k
views
C/C++ option not available in NetBeans
I upgraded Ubuntu 14.02 to Ubuntu 16.04 and realized that NetBeans was no longer working after the upgrade. So I installed netbeans again from the command line:
sudo apt install netbeans
But after ...
- 211
10
votes
4
answers
46k
views
GLIBCXX 3.4.30 not found in conda environment
I am installing a package with pip in my conda environment and I keep getting this error:
ImportError: /home/anavani/anaconda3/envs/dmcgb/bin/../lib/libstdc++.so.6: version `GLIBCXX_3.4.30' not found (...
- 101
10
votes
2
answers
75k
views
How I know what version of clang I have installed?
How I know what version of clang I have installed ?
10
votes
3
answers
45k
views
Eigen installation seemed to work, but I still can't make eigen work
I am trying to install eigen, but I don't seem to get it to work.
I did:
sudo apt-get install libeigen3-dev
and everything seems fine, after
dpkg -p libeigen3-dev
I get:
Package: libeigen3-dev
...
- 647
10
votes
1
answer
7k
views
Install latest cmake binary and accept licence automatically
I'm trying to install the latest binary version of cmake, on Ubuntu 16.04 LTS, automatically (via ansible).
I have so far done:
mkdir ~/tmp
cd ~/tmp
wget https://cmake.org/files/v3.10/cmake-3.10.0-...
- 223
10
votes
2
answers
29k
views
G++ compilation error "cc1plus" not found
I think I accidentally deleted a couple files from my machine, and now G++ won't compile.
I tried to apt-get remove it then apt-get install it to see if it would fix it, but it didn't work. Now I have ...
- 101
10
votes
1
answer
12k
views
clang doesn't find c++ stdlib on my ubuntu 18.04, but it does on a brand new install. What have I broken?
I've been building a github package for a while ... a new version comes out, and I build it.
It uses clang6 which is default on my ubuntu, ubuntu 18.04
now, it fails to compile, it can't find a ...
- 2,294
10
votes
2
answers
31k
views
Update GCC to the 6.3 version [closed]
I want to use some C++ features only available in more recent versions of the language. The problem is Ubuntu 15.04 (Vivid Vervet) has 4.9.2 installed and looking at the output I get from apt-get ...
- 125
10
votes
3
answers
36k
views
Cannot find boost-thread-mt library
I am compiling a program which requires boost-thread-mt library. I have installed libboost-all-dev using sudo apt-get install libboost-all-dev but compiler says that it cannot find boost-thread-mt ...
- 639
10
votes
1
answer
21k
views
C++ fmt library installation is not working
I'm a new C++ user and I have been facing some problems to install external libraries in my programs. Currently, I'm trying to install the fmt library. I downloaded the repository content and unpack ...
- 213
10
votes
2
answers
30k
views
How can I know which version of the C++ "standard library" is installed?
I would like to install the C++ standard library documentation (following the answers in Download C++ reference) but I do not know which version of library is installed in my Ubuntu.
10
votes
2
answers
3k
views
Unity Launcher API for C++
I am trying to develop some program in QT with QT SDK. Yesterday I was reading about Unity Launcher API on official ubuntu website. But there is example only for Vala and python. Is possible to use ...
- 1,381
10
votes
2
answers
2k
views
apt-get install <package> equivalent using C++ apt-pkg library
I am building a small QT (C++) application where I ask user the software he want to install. Once he selected some packages a, b, c from the list all I have to do is run
sudo apt-get install a b c
...
- 3,911
10
votes
1
answer
616
views
Howto create a new C++ based Ubuntu touch project in Ubuntu SDK?
There is no option to start a C++ and QML based project in Ubuntu SDK.
It only offers to create a QML project with no C++ codes.
If I try to add C++ classes to the QML project, I get this error:
...
- 245
9
votes
1
answer
55k
views
How to install Point Cloud Library v1.8 (pcl-1.8.0) on Ubuntu 16.04.2 [LTS] for C++? [closed]
I am trying to find a straight forward way to install C++ PCL v1.8 on Ubuntu 16.04.2 [LTS]
UPDATE -----
After working through the various issues individually:
This is a hybridisation of various ...
- 2,857
9
votes
1
answer
24k
views
Exec format error of gcc-compiled Hello World c++
On AWS Ubuntu Server, I wrote C++ Hello, World program:
#include <iostream>
using namespace std;
int main(){
cout<<"Hello, World!"<<endl;
return 0;
}
And compiled ...
- 193
9
votes
3
answers
18k
views
Unmet dependencies libc++ [duplicate]
How should I correctly install clang's c++ library (with STL) on my lubuntu machine? I want to use clang and its c++ library because it offers better support for the upcoming c++14 standard.
When ...
- 193
9
votes
2
answers
20k
views
Once installed geos library (C++, and C), and then trying to install rgeos package (R), it reports geos-config missing!
Knowing that the package rgeos, from the R language, requieres a prior installation of geos libraries, I installed, both, libgeos and libgeos-c1 (3.2.2), using the synaptic installer in my Ubuntu 12....
- 193
9
votes
3
answers
4k
views
Download C++ reference
I'm learning C++ and are currently for some weeks without consistently working Internet connection. I search a (ASCII) terminal searchable & readable C++ documentation. Today I e. g. searched for ...
- 411
9
votes
2
answers
6k
views
How to execute C++ program whenever a USB flash drive is inserted
I have a C++ program that accesses USB pen drives/flash drives. It works for currently inserted flash drive. A normal C++ program doesn't execute until we run it. But I wanted the program to run ...
- 437
9
votes
2
answers
42k
views
Installing MySQL Connector/C++
I would like to know which is the procedure to install the mysql c++ connector.
After installing it to my Ubuntu OS will I have these extra c++ commands avaiable in every c++ IDE? For example, can I ...
