by

C In Visual Studio Code



A full-featured but easy to use visual (WYSIWYG) HTML editor for creating web pages. Version 5.0 has a completely updated editor with many new features and support for the latest HTML standards. Our freeware visual editor is actually powered by Microsoft Internet Explorer. So you can always be sure you are seeing exactly what you will get. Install Visual Studio Code. Install the C/C extension for VS Code. You can install the C/C extension by searching for 'c' in the Extensions view (Ctrl+Shift+X). Install Mingw-w64 via the SourceForge website.

C# for Visual Studio Code (powered by OmniSharp) Welcome to the C# extension for Visual Studio Code! This extension provides the following features inside VS Code: Lightweight development tools for.NET Core. Great C# editing support, including Syntax Highlighting, IntelliSense, Go. In this video I go over adding C/C support to Visual Studio Code and showing how you can have intellisense support for C/C as well as that you can easily.

C# for Visual Studio Code (powered by OmniSharp)

Welcome to the C# extension for Visual Studio Code! This extension provides the following features inside VS Code:

  • Lightweight development tools for .NET Core.
  • Great C# editing support, including Syntax Highlighting, IntelliSense, Go to Definition, Find All References, etc.
  • Debugging support for .NET Core (CoreCLR). NOTE: Mono debugging is not supported. Desktop CLR debugging has limited support.
  • Support for project.json and csproj projects on Windows, macOS and Linux.

The C# extension is powered by OmniSharp.

Get Started Writing C# in VS Code

Note about using .NET Core 3.1.40x SDKs

The .NET 3.1.40x SDKs require version 16.7 of MSBuild.

For MacOS and Linux users who have Mono installed, this means you will need to set omnisharp.useGlobalMono to never until a version of Mono ships with MSBuild 16.7.

Note about using .NET 5 SDKs

The .NET 5 SDK requires version 16.8 of MSBuild.

For Windows users who have Visual Studio installed, this means you will need to be on the latest Visual Studio 16.8 Preview.For MacOS and Linux users who have Mono installed, this means you will need to set omnisharp.useGlobalMono to never until a version of Mono ships with MSBuild 16.8.

What's new in 1.23.11

  • Move the global Mono check to the correct place (#4489, PR: #4492)

What's new in 1.23.10

  • Support solution filters (*.slnf) (PR: #4481)
  • Prompt user to install Blazor WASM companion extension if needed (PR: #4392)
  • Add path to dotnet so child processes can use the CLI (PR: #4459)
  • Give more information when Mono is missing or invalid. (#4428, PR: #4431)
  • Revert incremental change forwarding (PR: #4477)
  • Fixes to asset generation (PR: #4402)
  • Add properties to blazorwasm debug configuration. (dotnet/aspnetcore#30977, PR: i#4445)
  • Avoid white status bar items to ensure contrast (#4384, PR: #4385)
  • Update OmniSharp to 1.37.8
    • Update Roslyn version to 3.10.0-1.21125.6 (PR: omnisharp-roslyn#2105)
    • Update included build tools to closely match NET 6 Preview 1 SDK (PR: omnisharp-roslyn#2103)
    • Improve custom error messages for MSB3644 (PR: omnisharp-roslyn#2097)
    • Do not call FindReferencesAsync for null symbol (omnisharp-roslyn#2054, PR: omnisharp-roslyn#2089)
    • use an OmniSharp specific message for MSB3644 (omnisharp-roslyn#2029, PR: omnisharp-roslyn#2069)
    • changed the default RunFixAllRequest timeout to 10 seconds (PR: omnisharp-roslyn#2066)
    • Support Solution filter (.slnf) (PR: omnisharp-roslyn#2121)
    • updated to IL Spy 7.0.0.6372 (PR: omnisharp-roslyn#2113)
    • Add sentinel file to MSBuild to enable workload resolver (#4417, PR: omnisharp-roslyn#2111)
    • fixed CS8605 'Unboxing possibly null value' (PR: omnisharp-roslyn#2108)
  • Updated Razor support (PR: #4470)
    • Bug fixes

What's new in 1.23.9

  • Add option to organize imports during document formatting. (PR: #4302)
  • Update to use zero based indexes (PR: #4300)
  • Improve request queues to improve code completion performance (PR: #4310)
  • Add setting to control whether to show the OmniSharp log on error (#4102, #4330, PR: #4333)
  • Support building launch assets for NET6-NET9 projects (#4346, PR: #4349)
  • Add debugger support for Concord extensions. See the ConcordExtensibilitySamples wiki for more information.
  • Update OmniSharp version to 1.37.6
    • Handle records in syntax highlighting (#2048, PR: #2049)
    • Remove formatting on new line (PR: #2053)
    • Validate highlighting ranges in semantic highlighting requests (PR: #2055)
    • Delay project system init to avoid solution update race (PR: #2057)
    • Use 'variable' kind for parameter completion (#2060, PR: #2061)
    • Log request when response fails (#2064)

What's new in 1.23.8

  • Updated Debugger support (PR: #4281)
    • Updated the version of .NET that the debugger uses for running its own C# code to .NET 5
    • Updated .NET debugging services loader to address problem with debugging after installing XCode12 (dotnet/runtime/#42311)
    • Fixed integrated terminal on non-Windows (#4203)
  • Updated Razor support (PR: #4278)
    • Bug fixes
  • Update OmniSharp version to 1.37.5 (PR: #4299)
    • Update Roslyn version to 3.9.0-2.20570.24 (PR: omnisharp-roslyn#2022)
    • Editorconfig improvements - do not lose state, trigger re-analysis on change (omnisharp-roslyn#1955, #4165, #4184, PR: omnisharp-roslyn#2028)
    • Add documentation comment creation to the FormatAfterKeystrokeService (PR: omnisharp-roslyn#2023)
    • Raise default GotoDefinitionRequest timeout from 2s to 10s (#4260, PR: omnisharp-roslyn#2032)
    • Workspace create file workaround (PR: omnisharp-roslyn#2019)
    • Added msbuild:UseBundledOnly option to force the usage of bundled MSBuild (PR: omnisharp-roslyn#2038)
  • Support auto doc comment generation (#8, PR: #4261)
  • Add schema support for appsettings.json (#4279, PR: #4280)
  • Add schema support for global.json (PR: #4290)
  • Update remoteProcessPickerScript windows ssh exit (#3482, PR: #4225)
  • Do not start OmniSharp server in Live Share scenarios (#3910, PR: #4038)
  • Suppress codelens for IEnumerable.GetEnumerator (#4245, PR: #4246)
  • Allow arm64 MacOS to debug dotnet projects (#4277, PR: #4288)

Emmet support in Razor files

To enable emmet support, add the following to your settings.json:

Semantic Highlighting

The C# semantic highlighting support is in preview. To enable, set editor.semanticHighlighting.enabled and csharp.semanticHighlighting.enabled to true in your settings. Semantic highlighting is only provided for code files that are part of the active project.

To really see the difference, try the new Visual Studio 2019 Light and Dark themes with semantic colors that closely match Visual Studio 2019.

Supported Operating Systems for Debugging

  • Currently, the C# debugger officially supports the following operating systems:

    • X64 operating systems:
      • Windows 7 SP1 and newer
      • macOS 10.12 (Sierra) and newer
      • Linux: see .NET Core documentation for the list of supported distributions. Note that other Linux distributions will likely work as well as long as they include glibc and OpenSSL.
    • ARM operating systems:
      • Linux is supported as a remote debugging target

Found a Bug?

To file a new issue to include all the related config information directly from vscode by entering the command pallette with Ctrl+Shift+P(Cmd+Shift+P on macOS) and running CSharp: Report an issue command. This will open a browser window with all the necessary information related to the installed extensions, dotnet version, mono version, etc. Enter all the remaining information and hit submit. More information can be found on the wiki.

Alternatively you could visit https://github.com/OmniSharp/omnisharp-vscode/issues and file a new one.

Development

First install:

  • Node.js (8.11.1 or later)
  • Npm (5.6.0 or later)

To run and develop do the following:

  • Run npm i
  • Run npm run compile
  • Open in Visual Studio Code (code .)
  • Optional: run npm run watch, make code changes
  • Press F5 to debug

To test do the following: npm run test or F5 in VS Code with the 'Launch Tests' debug configuration.

License

Copyright © .NET Foundation, and contributors.

The Microsoft C# extension is subject to these license terms.The source code to this extension is available on https://github.com/OmniSharp/omnisharp-vscode and licensed under the MIT license.

Code of Conduct

This project has adopted the code of conduct defined by the Contributor Covenantto clarify expected behavior in our community.For more information see the .NET Foundation Code of Conduct.

Contribution License Agreement

C In Visual Studio Code

By signing the CLA, the community is free to use your contribution to .NET Foundation projects.

.NET Foundation

This project is supported by the .NET Foundation.

In this tutorial, you configure Visual Studio Code to use the GCC C++ compiler (g++) and GDB debugger from mingw-w64 to create programs that run on Windows.

After configuring VS Code, you will compile and debug a simple Hello World program in VS Code. This tutorial does not teach you about GCC, GDB, Mingw-w64, or the C++ language. For those subjects, there are many good resources available on the Web.

If you have any problems, feel free to file an issue for this tutorial in the VS Code documentation repository.

Prerequisites

To successfully complete this tutorial, you must do the following steps:

  1. Install Visual Studio Code.

  2. Install the C/C++ extension for VS Code. You can install the C/C++ extension by searching for 'c++' in the Extensions view (⇧⌘X (Windows, Linux Ctrl+Shift+X)).

  3. Install Mingw-w64 via the SourceForge website. Click Mingw-w64 to download the Windows Mingw-w64 installer.

    1. Run the installer.
    2. For Architecture select x86_64 and then select Next.
    3. On the Installation Folder page, use the default installation folder. Copy the location as you will need it later.
    4. Select Next to start the installation.

  4. Add the path to your Mingw-w64 bin folder to the Windows PATH environment variable by using the following steps:

    1. In the Windows search bar, type 'settings' to open your Windows Settings.
    2. Search for Edit environment variables for your account.
    3. Choose the Path variable and then select Edit.
    4. Select New and add the Mingw-w64 destination folder path to the system path. The exact path depends on which version of Mingw-w64 you have installed and where you installed it. If you used the settings above to install Mingw-w64, then add this to the path: C:Program Filesmingw-w64x86_64-8.1.0-posix-seh-rt_v6-rev0mingw64bin.
    5. Select OK to save the updated PATH. You will need to reopen any console windows for the new PATH location to be available.

Check your MinGW installation

To check that your Mingw-w64 tools are correctly installed and available, open a new Command Prompt and type:

If you don't see the expected output or g++ or gdb is not a recognized command, check your installation (Windows Control Panel > Programs) and make sure your PATH entry matches the Mingw-w64 binary location where the compilers are located.

Create Hello World

From a Windows command prompt, create an empty folder called projects where you can place all your VS Code projects. Then create a sub-folder called helloworld, navigate into it, and open VS Code in that folder by entering the following commands:

The 'code .' command opens VS Code in the current working folder, which becomes your 'workspace'. As you go through the tutorial, you will see three files created in a .vscode folder in the workspace:

  • tasks.json (build instructions)
  • launch.json (debugger settings)
  • c_cpp_properties.json (compiler path and IntelliSense settings)

Add a source code file

In the File Explorer title bar, select the New File button and name the file helloworld.cpp.

Add hello world source code

Now paste in this source code:

Now press ⌘S (Windows, Linux Ctrl+S) to save the file. Notice how the file you just added appears in the File Explorer view (⇧⌘E (Windows, Linux Ctrl+Shift+E)) in the side bar of VS Code:

C++ In Visual Studio Code

You can also enable Auto Save to automatically save your file changes, by checking Auto Save in the main File menu.

The Activity Bar on the far left lets you open different views such as Search, Source Control, and Run. You'll look at the Run view later in this tutorial. You can find out more about the other views in the VS Code User Interface documentation.

Note: When you save or open a C++ file, you may see a notification from the C/C++ extension about the availability of an Insiders version, which lets you test new features and fixes. You can ignore this notification by selecting the X (Clear Notification).

Explore IntelliSense

In your new helloworld.cpp file, hover over vector or string to see type information. After the declaration of the msg variable, start typing msg. as you would when calling a member function. You should immediately see a completion list that shows all the member functions, and a window that shows the type information for the msg object:

You can press the Tab key to insert the selected member; then, when you add the opening parenthesis, you will see information about any arguments that the function requires.

Build helloworld.cpp

Next, you'll create a tasks.json file to tell VS Code how to build (compile) the program. This task will invoke the g++ compiler to create an executable file based on the source code.

From the main menu, choose Terminal > Configure Default Build Task. In the dropdown, which will display a tasks dropdown listing various predefined build tasks for C++ compilers. Choose g++.exe build active file, which will build the file that is currently displayed (active) in the editor.

This will create a tasks.json file in a .vscode folder and open it in the editor.

Your new tasks.json file should look similar to the JSON below:

C++

The command setting specifies the program to run; in this case that is g++. The args array specifies the command-line arguments that will be passed to g++. These arguments must be specified in the order expected by the compiler. This task tells g++ to take the active file (${file}), compile it, and create an executable file in the current directory (${fileDirname}) with the same name as the active file but with the .exe extension (${fileBasenameNoExtension}.exe), resulting in helloworld.exe for our example.

Note: You can learn more about tasks.json variables in the variables reference.

The label value is what you will see in the tasks list; you can name this whatever you like.

The 'isDefault': true value in the group object specifies that this task will be run when you press ⇧⌘B (Windows, Linux Ctrl+Shift+B). This property is for convenience only; if you set it to false, you can still run it from the Terminal menu with Tasks: Run Build Task.

Running the build

  1. Go back to helloworld.cpp. Your task builds the active file and you want to build helloworld.cpp.

  2. To run the build task defined in tasks.json, press ⇧⌘B (Windows, Linux Ctrl+Shift+B) or from the Terminal main menu choose Run Build Task.

  3. When the task starts, you should see the Integrated Terminal panel appear below the source code editor. After the task completes, the terminal shows output from the compiler that indicates whether the build succeeded or failed. For a successful g++ build, the output looks something like this:

  4. Create a new terminal using the + button and you'll have a new terminal with the helloworld folder as the working directory. Run dir and you should now see the executable helloworld.exe.

  5. You can run helloworld in the terminal by typing helloworld.exe (or .helloworld.exe if you use a PowerShell terminal).

Note: You might need to press Enter a couple of times initially to see the PowerShell prompt in the terminal. This issue should be fixed in a future release of Windows.

Modifying tasks.json

You can modify your tasks.json to build multiple C++ files by using an argument like '${workspaceFolder}*.cpp' instead of ${file}. This will build all .cpp files in your current folder. You can also modify the output filename by replacing '${fileDirname}${fileBasenameNoExtension}.exe' with a hard-coded filename (for example '${workspaceFolder}myProgram.exe').

Debug helloworld.cpp

Next, you'll create a launch.json file to configure VS Code to launch the GDB debugger when you press F5 to debug the program.

  1. From the main menu, choose Run > Add Configuration... and then choose C++ (GDB/LLDB).
  2. You'll then see a dropdown for various predefined debugging configurations. Choose g++.exe build and debug active file.

VS Code creates a launch.json file, opens it in the editor, and builds and runs 'helloworld'.

The program setting specifies the program you want to debug. Here it is set to the active file folder ${fileDirname} and active filename with the .exe extension ${fileBasenameNoExtension}.exe, which if helloworld.cpp is the active file will be helloworld.exe.

By default, the C++ extension won't add any breakpoints to your source code and the stopAtEntry value is set to false.

How To Set Up C++ In Visual Studio Code

Change the stopAtEntry value to true to cause the debugger to stop on the main method when you start debugging.

Note: The preLaunchTask setting is used to specify task to be executed before launch. Make sure it is consistent with the tasks.json file label setting.

Start a debugging session

  1. Go back to helloworld.cpp so that it is the active file.
  2. Press F5 or from the main menu choose Run > Start Debugging. Before you start stepping through the source code, let's take a moment to notice several changes in the user interface:
C In Visual Studio Code

  • The Integrated Terminal appears at the bottom of the source code editor. In the Debug Output tab, you see output that indicates the debugger is up and running.

  • The editor highlights the first statement in the main method. This is a breakpoint that the C++ extension automatically sets for you:

  • The Run view on the left shows debugging information. You'll see an example later in the tutorial.

  • At the top of the code editor, a debugging control panel appears. You can move this around the screen by grabbing the dots on the left side.

Step through the code

Now you're ready to start stepping through the code.

  1. Click or press the Step over icon in the debugging control panel.

    This will advance program execution to the first line of the for loop, and skip over all the internal function calls within the vector and string classes that are invoked when the msg variable is created and initialized. Notice the change in the Variables window on the left.

    In this case, the errors are expected because, although the variable names for the loop are now visible to the debugger, the statement has not executed yet, so there is nothing to read at this point. The contents of msg are visible, however, because that statement has completed.

  2. Press Step over again to advance to the next statement in this program (skipping over all the internal code that is executed to initialize the loop). Now, the Variables window shows information about the loop variables.

  3. Press Step over again to execute the cout statement. (Note that as of the March 2019 release, the C++ extension does not print any output to the Debug Console until the loop exits.)

  4. If you like, you can keep pressing Step over until all the words in the vector have been printed to the console. But if you are curious, try pressing the Step Into button to step through source code in the C++ standard library!

    To return to your own code, one way is to keep pressing Step over. Another way is to set a breakpoint in your code by switching to the helloworld.cpp tab in the code editor, putting the insertion point somewhere on the cout statement inside the loop, and pressing F9. A red dot appears in the gutter on the left to indicate that a breakpoint has been set on this line.

    Then press F5 to start execution from the current line in the standard library header. Execution will break on cout. If you like, you can press F9 again to toggle off the breakpoint.

    When the loop has completed, you can see the output in the Integrated Terminal, along with some other diagnostic information that is output by GDB.

Set a watch

Sometimes you might want to keep track of the value of a variable as your program executes. You can do this by setting a watch on the variable.

  1. Place the insertion point inside the loop. In the Watch window, click the plus sign and in the text box, type word, which is the name of the loop variable. Now view the Watch window as you step through the loop.

  2. Add another watch by adding this statement before the loop: int i = 0;. Then, inside the loop, add this statement: ++i;. Now add a watch for i as you did in the previous step.

  3. To quickly view the value of any variable while execution is paused on a breakpoint, you can hover over it with the mouse pointer.

C/C++ configurations

If you want more control over the C/C++ extension, you can create a c_cpp_properties.json file, which will allow you to change settings such as the path to the compiler, include paths, C++ standard (default is C++17), and more.

C Programming In Vs Code

You can view the C/C++ configuration UI by running the command C/C++: Edit Configurations (UI) from the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)).

This opens the C/C++ Configurations page. When you make changes here, VS Code writes them to a file called c_cpp_properties.json in the .vscode folder.

Here, we've changed the Configuration name to GCC, set the Compiler path dropdown to the g++ compiler, and the IntelliSense mode to match the compiler (gcc-x64)

Visual Studio Code places these settings in .vscodec_cpp_properties.json. If you open that file directly, it should look something like this:

You only need to add to the Include path array setting if your program includes header files that are not in your workspace or in the standard library path.

Configure C In Visual Studio Code

Compiler path

The extension uses the compilerPath setting to infer the path to the C++ standard library header files. When the extension knows where to find those files, it can provide features like smart completions and Go to Definition navigation.

The C/C++ extension attempts to populate compilerPath with the default compiler location based on what it finds on your system. The extension looks in several common compiler locations.

The compilerPath search order is:

  • First check for the Microsoft Visual C++ compiler
  • Then look for g++ on Windows Subsystem for Linux (WSL)
  • Then g++ for Mingw-w64.

If you have Visual Studio or WSL installed, you may need to change compilerPath to match the preferred compiler for your project. For example, if you installed Mingw-w64 version 8.1.0 using the i686 architecture, Win32 threading, and sjlj exception handling install options, the path would look like this: C:Program Files (x86)mingw-w64i686-8.1.0-win32-sjlj-rt_v6-rev0mingw64bing++.exe.

C Programming Visual Studio Code

Next steps

Visual Studio Code For Beginners

  • Explore the VS Code User Guide.
  • Review the Overview of the C++ extension.
  • Create a new workspace, copy your .vscode JSON files to it, adjust the necessary settings for the new workspace path, program name, and so on, and start coding!