I am new to writing c under linux so this will be maybe silly question, but I have problem using fopen. When I encountered the problem I just tried it with this really simple code: test.txt is in same folder as this code and a.out. When I debug a.out I get: I tried changing the path: if( fopen(“/home/h1657/Work/test/test.txt”,”r”) == NULL
Tag: c++
Build Qt application for Linux in Windows using Qt Creator
I want to run a Qt application in Linux which is compiled on Windows using Qt Creator. I tried googling but I did not get any answers regarding Qt creator. I found for Visual studio. Can anyone please let me know if this can be done in Qt Creator in Windows7 ? Do I need to install any other compilers
F_SETPIPE_SZ undeclared
I have included following headers: I have also tried to use before #include <unistd.h>, but it also does not help. I try to use fcntl and pass it F_SETPIPE_SZ as second argument, but I keep getting this error message: error: ‘F_SETPIPE_SZ’ undeclared (first use in this function) I actually found out that I don’t need this, but I’m just curious
How to use atomic variables in C?
I need to use an atomic variable in C as this variable is accessed across different threads. Don’t want a race condition. My code is running on CentOS. What are my options? Answer If you are using GCC on your CentOS platform, then you can use the __atomic built-in functions. Of particular interest might be this function: — Built-in Function:
System commands in c#
Does C# have an equivalent to the system command in C? for example, how would I do this in c#?. I’m using Mono on Linux. Answer No problem I got it. Tested and working on Ubuntu 13.10
Variable reset after scanf
I wrote the below function : I print the currentPlayer on any level to see what’s going on -> here what I get: Why the current player is 0 after scanf? I didn’t touch it. Answer The buffer location has only room for 2 characters and scanf puts an extra NUL character at end. Therefore you have a stack corruption
Basler Pylon 4 SDK and OPENCV 2.4.8, Linux simple viewer
I am developing a simple camera viewer to test Basler camera acA1300-30gc. I am working in Ubuntu 14.04 with Basler Pylon 4 and OPENCV version 2.4.8 because I am going to develop a machine vision application and I need to analyze frames on the fly. Based on OpenCV Display Image Tutorial, Sample Code in Pylon Documentation and this similar question
Why aren’t glibc’s function addresses randomized when ASLR is enabled?
In trying to understand ASLR, I built this simple program: ALSR seems to be enabled: and I used GCC to compile the program: Every time I run this program, it prints the same address (0x400450). I would expect this program to print a different address each time if glibc is loaded at a random address. This is surprising to me,
kvm: module verification failed: signature and/or required key missing – tainting kernel
I’m using Ubuntu 14.04 LTS and kernel version 3.13.11.4. I’m trying to load patched KVM modules kvm and kvm-intel and I’m getting the following errors kvm: module verification failed: signature and/or required key missing – tainting kernel and kvm: module has bad taint, not creating trace events. The source used is the same source that created the image that I
Can’t run c/c++ codes in code::blocks 13.12 on linuxmint 17: Status 255
I am not able to run any C/C++ programs in code::blocks. Could anyone please suggest why this is happening? Currently I have the gnu c and g++ compilers installed on the system. The error message on building and running this simple c code: is: Checking for existence: /home/user1/Desktop/progs/a Executing: xterm -T ‘/home/user1/Desktop/progs/a’ -e /usr/bin/cb_console_runner “/home/user1/Desktop/progs/a” (in /home/user1/Desktop/progs) Process terminated with