- #How to see console output in visual studio 2019 code#
- #How to see console output in visual studio 2019 iso#
- #How to see console output in visual studio 2019 windows#
C++20 and No Macros?ĭuring the last ISO meeting, the committee accepted std::source_location into C++20!Ĭ++ Extensions for Library Fundamentals, Version 2 - 14. Template void MyTraceImplTmp ( int line, const char * fileName, Args &. #define MY_TRACE_TMP(.) MyTraceImplTmp(_LINE_, _FILE_, _VA_ARGS_) Same goes for _VA_ARGS_: see 19.3 Macro replacement - cpp.replaceĪnd here’s the implementation of MyTrace: Please note that _FILE_ and _LINE_ are also specified by the standard, so other compilers should also implement it. Please note that /FC is implied when using Edit and Continue. The option makes filenames longer (full path), or shorter (relative to the solution dir). To control the _FILE_ macro you can use the compiler option /FC.
#How to see console output in visual studio 2019 code#
As the name suggest they expand into the filename of the source code and the exact line in a given translation unit. What are _FILE_ and _LINE_? In Visual Studio ( see msdn), those are predefined macros that can be used in your code. File and Line cannot be fetched inside MyTrace because it would always point to the source code where MyTrace is implemented – not the code that calls it. Otherwise, we would have to pass the line number and the filename manually. The above code calls the MyTrace function that internally calls OutputDebugString. Standard C++ for Visual Studio & Windowsįor VS, first of all, you need to output the message using OutputDebugString (Win specific function): We’ll implement this code with “standard” C++, then move to modern C++ and finally see what’s coming with C++20. Now, to reduce the redundant effort, if you want to see the output window every time, whenever your build start, you need to do a small settings. Now that you know the proper format of the message, how do you use it in the code? Let’s go step by step. So when ever you want to see the output window during build time, you have to go to View > Output or using shortcut key off Ctrl + W, O. You cannot beat this double-clicking approach, which is much more efficient! When I see a message, I copy it, search the solution, and then usually after scrolling around I finally get to the right line of code. Why is it so important? In my case, I’ve lost a lot of time when I tried to look for the origin of some log output. See below for a file called DebuggingTipsSamples.cpp: You can now double-click on the line in VS output window, and immediately VS opens myfile.cpp at line 32. In Visual Studio, there’s a trick that allows you to move quickly from the debug output window to a particular line of code.Īll you have to do is to use the following format: "%s(%d): %s", file, line, messageįor example: myfile.cpp(32) : Hello World Which might be very handy when you scan lots of logs. That way you’ll see the source of that message. You can easily enhance this technique by adding LINE and FILE information. Run the console application and the below screen output appears.Std :: cout << "my val: " << val << '\n' Type the following command: dotnet run.Post the code you use in the service to create the pipe and start the console application with redirected output. If you can see text output in the console application's window then the console application's stdout has not been redirected.
#How to see console output in visual studio 2019 windows#
NET Core packages that are needed to build your project But after the console application finishes, no console output text is read by my windows service.