I attempted to follow through on VS Code's method on making C++ code work on their editor. I did this successfully on my laptop but when I tried compiling it, I was met with the error:
* Executing task: C/C++: g++.exe build active file
Starting build...
C:\msys64\mingw64\bin\g++.exe -fdiagnostics-color=always -g "C:\Users\salty\Documents\Programming\C++ Scripts\myProgram\main.cpp" -o "C:\Users\salty\Documents\Programming\C++ Scripts\myProgram\main.exe"
'cmd' is not recognized as an internal or external command,
operable program or batch file.
Build finished with error(s).
* The terminal process failed to launch (exit code: -1).
* Terminal will be reused by tasks, press any key to close it.
This is the entire error message plus extra things in my editor.
If I try and copy and paste the command in the message into Windows Power Shell, it actually works (New .exe file appeared in the correct directory and runs without fault).
These are my environment variables for User, and these are my System variables.
I've tried uninstalling and re-installing and changing the paths around. I'm new to C++ programming and how compilers work in general, but I'm not sure why VS Studio says it doesn't recognize cmd among others it could've not recognized.
Why is it giving me this error?
Edit: I believe I didn't include a return 0; line in the program. Correcting this did not fix the issue.
I am not sure what I poked into place or if I just was too incompetent to realize something, however adding %SystemRoot%\system32 to my PSModulePath environment variables somehow fixed the issue, and since that action I have yet to replicate the compile error.
I don't know if adding that variable to my environments permanently fixed it or VS Studio needed a moment to process some things. Thanks anyways!
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i just started to code in cpp and nothing is working idk if i didn't install the gcc properly or what but i already set the path of the bin file idk why it refuses to run
the code:
#include<iostream>
int main()
{
std::cout<<"hello";
}
and the problem is that when I try to use the "code runner extension" it is not working so I just press f5 and then when I get the error messages which says at first "could not find the task file'c/c++:g++.exe build active file' " and I get three options 1:debug anyway
2:configure task
3:cancel
when I choose debug anyway I get this error here
Since you're on windows consider installing Visual Studio or CLion. They're more beginner friendly - VSCode can get tricky to run c++ on windows. Either way, looks like you're trying to run your project without building it first. There should be a build option right next to the run option. Try building it, then running. The build is what compiles and creates the project.exe file, which is what the compiler is saying isn't there.
The referenced IDE's always auto-build on run, so there's that
If you're familiar with using the command line, these commands will do what you want, assuming the .cpp file is in your current directory.
g++ <FILENAME>
./a.out
There are wonderful flags you can add to the first command (the compiling command) like -Wall, -Wextra, -o, and many more. But, since it seems like you're just starting out, there's no need to worry about those!
If you're not familiar with the command line, I would encourage you to become familiar! It is an extremely powerful tool for a programmer. Here is a YouTube video that talks about it.
I get the following error:
Exception occurred executing command line.
Cannot run program "C:/OMNEST-5.5.1/samples/enera/lteAdvanced/enera.exe" (in directory "C:\OMNEST-5.5.1\samples\enera\lte"): CreateProcess error=2, The System cannot find the file.
I already built the project many times. I have tried to make a simplier already given example from omnet just to check if this is working. It is working. But if I copy this example in my Project it also doesn't work, so there is sth wrong with my Project file. But it seems to be correct. I just have one Connection and kept it really really simple. But it doesn't work. I have installed Omnest and inet correctly.
The most likely cause is that the EXE file cannot find the omnet++ dynamic libraries it tries the load. And the most likely reason is that you are trying to execute the executable from a CMD prompt instead of from the shell provided by the mingwenv.cmd script.
Everything you do in OMNeT++ (including starting the simulations) must be run from the mingwenv shell.
I have recently started coding with C++ and I have come across a little source of error which I think requires knowledge about computers that I don't have.
When I write a simple code (in Visual Studio Express 2013), let's say a "Hello World!" example, I Build and Start Without Debugging successfuly.
Then, when I edit my code to print the sum of two numbers for example, I get an error when I try to Build. I get this error:
Error 1 error LNK1168: cannot open c:\users\name\documents\visual
studio 2013\Projects\ConsoleApplication4\Debug\ConsoleApplication4.exe
for writing
But if I wait for a bit and then re-attempt to Build, everything is fine.
I have also noticed this when I use g++ in the standard cmd module; if I try to complile a code under the same name (for the .exe file) I get an Access Denied error, but if I wait a bit I am allowed to do it.
My instincts tell me that the computer still has the .exe file running for a bit after I execute it, and it is not allowing me to overwrite it.
It's because the process is still running and therefore the file is in use and write-locked. It takes Windows a few tempo beats to clean everything up after you've terminated.
i am getting this error at compile (actually this is a very simple project and the syntax is absolutely ok)
E:\proj1\Makefile.win [Build Error] [main.o] Error 1
this is my compiler log (dev c++ v 4.9.9.2)
Compiler: Default compiler
Building Makefile: "E:\proj1\Makefile.win"
Executing make...
make.exe -f "E:\proj1\Makefile.win" all
g++.exe -c main.cpp -o main.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include"
'C:\Users\r' is not recognized as an internal or external command,
operable program or batch file.
The system cannot find the path specified.
make.exe: *** [main.o] Error 1
Execution terminated
my user path is 'c:\Users\r&d', i think the '&' is makeing trouble in compile process , does anybody has any idea ?, i can not reinstall windows because i have got many softwares installed on my current windows and it is very time consuming to me, how can i fix this /
r&d is definitely a problem. Try surrounding it with quotes: "c:\users\r&d" and hope for the best. If it doesn't work, change the folder to something without an ampersand (you don't need to reinstall Windows for that, just create another user).
You can try creating another user without the ampersand, and then copying your profile to it to keep all your settings and application preferences, as well as documents.
You might want to try another build enviroment, like code:blocks which has its own internal build system. You probably want make sure you are using the latest gcc mingw compiler and build system from mingw(use their installer, I think it was http://sourceforge.net/projects/mingw/files/Installer/mingw-get-inst/mingw-get-inst-20120426/ ), and even if you don't go with code::blocks, make sure you are using the new branch of devc++ that was forked and still being developed. One last thing is if you go with code::blocks, use a nightly build in the forum, http://forums.codeblocks.org/index.php/board,20.0.html as they are much more up to date.
The escape character in Windows is ^. So try
C:\Users\r^&d
I’ve produced a C++ program in Eclipse running on Redhat, which compiles and runs fine through Eclipse.
I thought that to run it separately to Eclipse you use the build artifact which is in the directory set via the project’s properties.
However this executable doesn’t run (I know it’s an executable as I’ve set it to be an executable via the project’s properties and it shows up as such via the ls command and the file explorer).
When attempting to run it using the executable’s name, I get the error:
bash: <filename>: command not found
When attempting to run it as a bash file:
<filename>: <filename>: cannot execute binary file
And when running it with "./" before the file name, nothing happens. Nothing new appears in the running processes and the terminal just goes to the next line as though I’d just pressed enter with no command.
Any help?
You've more or less figure out the first error yourself. when you just run <filename> , it is not in your PATH environment variable, so you get "command not found". You have to give a full or relative path when to the program in order to run it, even if you're in the same directory as the program - you run it with ./<filename>
When you do run your program, it appears to just exit as soon as you start it - we can't help much with that without knowing what the program does or see some code.
You can do some debugging, e.g. after the program just exits run echo $? to see if it exited with a particular exit value, or run your program using the strace tool to see what it does (or do it the usual way, insert printf debugging, or debug it with gdb)