I have this well known c++ program in my Visual Studio 2015 Prof:
#include <iostream>
int main(int argc, char* argv[]) {
std::cout << "Hello World!" << std::endl;
return 0;
}
As expected, it shows "Hello World!" if I hit Ctrl+F5. However, if I go to the directory within an cmd.exe and execute the HelloWorld.exe file, it doesn't show anything as output, but does quit (I can type in again).
According to a similar question I checked the settings of the project but I did not need to change anything, the Configuration Properties -> Linker -> System -> SubSystem already is at Console (/SUBSYSTEM:CONSOLE).
Flushing the std::cout also didn't help anything. It is reproducable on every freshly created project of VS2015 on my Win 7 64-bit machine and seems to be presistent after rebooting.
What is wrong with my IDE / settings?
After the hint of #Scheff I threw the exe file into "Dependency Walker". It gave me a missing UCRTBASED.DLL and lots of second and third level missing dlls (I think this is usually the case on every application?).
I somehow think my (recently installed) anti virus did interfere with that, because it shows some messages in the log regarding my HelloWorld.exe.
However, deinstalling anti virus and restarting machine did the trick. I can finally see Hello World! on cmd.exe.
Related
First of all, sorry if this is in the wrong category, as I am not sure what the cause of this problem is.
For educational purposes I have created a small "Hello World" application
#include <iostream>
int main() {
std::cout << "Hello World\n";
return 0;
}
I have tried compiling it with both Visual Studio as well as MINGW-64(g++ -m64 main.cpp), as a 64-bit application. It runs perfectly on my Windows computer, but when I try to run it within the latest Windows PE it doesn't print out any thing. I have also tried with std::cin so that the program doesn't stop right away, but the same thing happens - no output and no error.
I know WinPE is very limited in terms of included libraries and subsystems, but I really thought that this simple Hello World app would run. The WinPE environment is 64-bit, that 's why I am compiling as 64-bit
Any ideas where I should start?
I found the actual problem. I didn't compile the application statically which caused it to rely on dependencies not found in WinPE. I re-compiled it using the '-static' flag and it now works as expected on both WinPE and desktop versions of Windows.
Use
std::cout << "Hello World" << std::endl;
std::endl will flush the content and add a \n at the end of your message.
I am a first time C++ user, and I have been working for 8 hours trying to build and compile the simple "Hello World" program with C++ in Visual Studio Code. I have CygWin64, but I'm not sure if it's connected to my VSCode. I have installed the extensions C/C++, C/C++ Compile Run, C++ Intellisense, Clang-Format, and Easy C++ projects.
So far I have tried
#include <iostream.h>
main()
{
cout<< "Hi there";
return 0;
}
and
#include <iostream.h>
int main() {
std::cout << "Hello Easy C++ project!" << std::endl;
}
Using iostream.h helped me to get to work (it wouldn't at first), but I'm not sure if that is helpful, since other posts say that .h is very archaic. I have also tried editing my c_cpp_properties.json file. Sadly, I still get the message:
"> Executing task: bash -c "make run" <
'bash' is not recognized as an internal or external command,
operable program or batch file.
The terminal process terminated with exit code: 1
Terminal will be reused by tasks, press any key to close it."
I am not sure if I need to install an alternative to Clang (I haven't found one), or run something initially on Cygwin64.
I have been looking online for suggestions and following pages such as https://dev.to/acharluk/developing-c-with-visual-studio-code-4pb9 and https://github.com/Microsoft/WSL/issues/1598, but I still can't seem to get around this problem.
Any help would be very appreciated.
Thanks,
Anne
It's been days since I try to make my IDE (Code::Blocks version 13.12, I tried on 10.05 too) work. Any program (including a simple Hello World! program) I would make would show a black console showing nothing but an " _ ". I have made an exception in my antivirus (Avast!) for the file containing the IDE) but the same thing happens . I have tried re-installing twice, i have tried resetting the compiler and debugger's settings to default, auto-detecting toolchain executables ,but the same thing happens.
I have tried rebooting my computer several times, same thing happens.
I would like to know what I can do to solve this problem , because I don't want to get another complicated compiler (I am a beginner,) , as Code::Blocks fits my needs perfectly.
The following codes produces a blank console:
#include <iostream>
int main()
{
std::cout << "Hello world!\n";
return 0;
}
I had the same exact problem, with Eclipse, Visual Studio and then with Code::Blocks (I tested them all). I suggest you follow this video tutorial after you confirm the problem persists with a second IDE : https://www.youtube.com/watch?v=zOGU8fC3bvU&index=6&list=LLHcXdIeBMN4XYRZAk4IeXmg&spfreload=10 . It will take you step by step on how to install a given compiler.
I tried to compile a simple Hello World in C++ to test that my Visual Studio 2013 on my Windows 10 works well but I've a problem. My program compile but when I run, it freeze. It's an empty Win32 Console Application with a "main.cpp" :
#include <iostream>
using namespace std;
int main()
{
cout << "Hello world!";
return 0;
}
If I launch it from Visual Studio in debug (with "Run"), Visual Studio freeze and I need to kill its task.
If I launch it with the executable or with "Run without Debugging", nothing appear, "System" process doesn't want to free the execution and I can't recompile without restart the computer because of that.
I am confused. If somebody have an idea of what's happening, please help me.
Update 1 : I repair my installation. Same problem. Breakpoint doesn't help. It seems to freeze before. And also no trace of a task in the task manager when launched without debugging.
It was my antivirus' fault (in my case, Avast). I made it ignore my Visual Studio projects and it works. Solved by #Blastfurnace.
I've been trying to get into C++ programming with Eclipse, but I'm having problems setting up Eclipse.
I have MinGW installed and in the environment path, and I created the simple C++ project with the following source code:
#include <iostream>
int main(void)
{
std::cout << "what is your name? ";
std::string name;
std::cin >> name;
std::cout << "Hello, " << name << std::endl;
std::cin.ignore();
return 0;
}
After successfully building the project (both debug and release configurations), I click the run button and there's no output. The program terminates immediately. I've also tried running in debug mode, but then it will wait for me to type in a name, then display all the output. example console:
scott
what is your name? Hello, scott
I've tried this with both the 32 and 64 bit Windows versions of Eclipse Helios and both versions have the same behavior. Does anyone know what is going on and how to fix this?
I've run the program from the command-line and it works as intended.
edit: After some tinkering around, I found that by copying the MinGW dll's into the same folder as the executable the program will run in Eclipse just fine. Is there an alternative method to have Windows find the dll's in MinGW's bin folder rather than have to copy them over each time?
Is there an alternative method to have Windows find the dll's in MinGW's bin folder rather than have to copy them over each time?
Set the PATH environment variable in the run configuration settings (Run -> Run Configurations... -> Environment).