I am still very new to c++ , And i cant seem to compile my very first c++ hello world program after writing my program i go to command prompt and change the directory to desktop because that is where i have saved my program then enter hello.cpp (hello.cpp is the name of my program)and instead of compiling it, It shows me a message saying how do u want to open this file? even thought i already installed mingw ,and changed the environment variables
compile your code to create .exe by below command.
g++ hello.cpp -o hello.exe
MinGW for First Time Users HOWTO
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I want to run a C++ program in VS Code. All I get from Google is that click on run and debug (the play button) on top right in VS Code and my program will be up and running. I don't want to do from that. I want to do it from terminal.
Example, to run:
A Python file I do: python3 fileName.py
A Flutter program: flutter run
A Java file: javac fileName.java
A Go file: go run fileName.go
Is there any command similar like this in C++?
Apologies, I know my question is a little naïve.
i guess the short answer would be :
$ g++ -o < name-you-want-to-give> source.cpp
In place of replace it by any name like myprogram, etc.
./myprogram
This mean you had to install gcc compiler beforehand.
I need to be in my project directory and then i need to run
g++ 01inputFromUser.cpp -o 01inputFromUser && "/home/aman/Desktop/arjun/cpp/"01inputFromUser
so this was what I was looking for
g++ fileName.cpp -o fileName && "/path/to/project/"fileName
I just switched to ubuntu and I wanted to setup notepad++ for CPP.
So I used the NppExec plugin to compile within notepad++,
My script was :
npp_save
g++ "$(FULL_CURRENT_PATH)" -o "$(CURRENT_DIRECTORY)\$(NAME_PART)obj"
./"$(NAME_PART)obj"
Here the "obj" I used is to just save the file with an "obj" keyword nothing else.
The last line ./"$(NAME_PART)obj" is to run the program.
But it looks not working in ubuntu, it produces this error:
NPP_SAVE: Z:\home\username\cpp\test.cpp
g++ "Z:\home\username\cpp\test.cpp" -o "Z:\home\username\cpp\testobj"
; about to start a child process: "g++ "Z:\home\username\cpp\test.cpp" -o "Z:\home\username\cpp\testobj"
CreatProcess() failed with error code 2:
File not found.
./"testobj"
; about to start a child process: "./"testobj""
CreatProcess() failed with error code 2:
File not found.
I have investigated some of what I think is the problem, so I think is the usage of / and \ in changing the directory.
I don't know how to fix that, so I can not be sure.
Any ideas? :) I am using vim btw in the same machine and it is working perfectly.
In theory it might be possible (see below), in practice it is rather convoluted and works only for simple compiles (like single file hello world type).
I would suggest you try a linux program, e.g.
an editor like
scite (same editing engine as notepad++) or
kate
or a real IDE like
kdeveloper or
qtcreator.
The problems with Notepad++ inside wine and g++ outside wine (from the linux install ) are this:
notepad++ inside wine under linux is still a windows program
NppExec can only do, what a cmd inside wine can do.
starting g++ directly inside cmd is an error due to g++ being a linux binary and not a windows binary
that is your CreatProcess() failed with error code 2, it means: you are trying to execute a linux program inside wine.
That does not work! (At least not so easy.)
Though you can start linux program inside cmd inside wine using start /unix ...
started this way, g++ wants linux paths and NppExec through its variables will provide only windows paths (whatever wine has set up as drives like Z:\home\username\src\hello.cpp)
though you can convert wine paths to linux paths via the winepath -u command.
g++ started through 'start /unix ... ' inside a cmd inside wine has no proper terminal to report errors to you
though you can start an xterm for g++ and have g++ reports its messages to the xterm
the downside is that g++ will report errors using the linux paths in the xterm, so you cannot double click on an error message an get to the corresponding filename and line.
You get the idea: its complicated not comfortable.
What worked for me for a helloword.cpp was this NppExec script:
NPP_SAVE
npp_run cmd /c start /unix /usr/bin/xterm -e "/usr/bin/winepath -u '$(FULL_CURRENT_PATH)' | xargs g++ -o /tmp/a.out && /tmp/a.out ; echo 'Press return'; read"
The second line
uses an xterm,
let winepath convert the Z:\home\... path to /home/... and
have that send to g++ for compilation using /tmp/a.out as binary
if compile is successfull, /tmp/a.out is executed
the echo and read are for keeping the xterm open so that you can read the output.
If you really want to use Notepad++ inside wine, one option might be using Gnu Make outside of wine and have NppExec run make all or make run similar to the g++ in my script example. That would work for more complicated compiles.
I am just starting to use Nitrous.IO and I can't seem to find any information on the web on how to run C++ programs you make in it. Any help on how to run a C++ app made in Nitrous would be a huge help.
All commands are to be run within the console
Step 1:
Get inside the appropriate directory using the following command:
cd ./folder/subfolder/etc.
Step 2:
Type in the following command to run a fileName.cpp program:
// This will make a separate file named 'fileName'
// within the directory you are working in.
// This can now be run in the console.
g++ -o fileName fileName.cpp
Step 3:
Type in the following command to run your program:
//The output will display in the console. Enjoy!
./fileName
ps: answer was there
When I run my c++ programs from Terminal (Mac OS X), output from programs is shown in a new Terminal window.
What can I do to prevent the new window, and just have the programs' output straight in the window thats already open?
I believe gcc comes with the XCode tools package.
If you have gcc installed, open terminal window, cd to the directory where you put your cpp file, and type:
g++ myTestFile.cpp -o main; ./main
Replace 'myTestFile' by the name of your file, naturally. you can also rename the 'main' which is just the name of the compiled module, which you need to run by typing ./main to retrieve the output of your code.
I guess you are using the open command.
$ open foo
This will open a new terminal window.
Don't use the open command if you want the program to run in the current terminal window.†
$ foo
† You should obviously leave out the dollar sign.
I'm trying to compile a C++ project (Hello World) in windows 7 using Eclipse Helios. After creating the project the console shows me the next message:
Internal Builder is used for build **
g++ -O0 -g3 -Wall -c -fmessage-length=0 -osrc\hello.o ..\src\hello.cpp
g++ -ohello.exe src\hello.o
c:/mingw/bin/../lib/gcc/mingw32/4.5.0/../../../../mingw32/bin/ld.exe:
warning: auto-importing has been activated without --enable-auto-import specified on the command line.
If I open the command line and execute: g++ hello.cpp -Wl,-enable-auto-import, I can generate the exe file and I can run it.
In eclipse after adding the argument "-Wl,--enable-auto-import" in the MinGW C++ Linker - Miscellaneous section, I didn't get any warning however, the console is always empty. Again, using the command line, if I move to the directory and execute the exe file generated by eclipse I get the expected result.
I know that Eclipse is compiling the cpp file properly but, why the eclipse console is not displaying the info? Is something missing in the configuration?
Sorry guys my stupid question.
I appreciate your help.
This looks like an environment variable(s) and/or register paths problem.