如何在VS Code中运行C/C++程序？是否支持保存自动编译运行？

Absolutely! You can set up auto-compile and auto-run for C/C++ in VS Code just like how Live Server refreshes HTML pages on save. Let me walk you through the most practical, user-friendly methods to get this working:

1. Use a Dedicated Extension (Quickest Setup) #

These extensions are built to handle C/C++ execution with minimal configuration:

• Code Runner: A popular all-in-one extension that supports auto-run on save.

  1. Install Code Runner from the VS Code Marketplace.
  2. Open your settings (Ctrl+, on Windows/Linux, Cmd+, on Mac), search for "Code Runner: Run On Save" and check the box.
  3. Ensure your compiler (GCC, Clang, or MSVC) is installed and added to your system PATH—Code Runner will detect it automatically.

• C/C++ Compile Run: An extension made specifically for C/C++ workflows.

  1. Install the extension from the marketplace.
  2. Navigate to its settings, find "Auto Run On Save" and enable it.
  3. You can tweak compile flags (like adding -Wall for warnings) in the extension settings if you want to customize the build process.

2. Custom Setup with Tasks + File Watcher (For Full Control) #

If you prefer avoiding extensions and want full control over the compile/run process, use VS Code's built-in tasks paired with a file watcher:

1. Open your C/C++ project folder in VS Code.
2. Create a .vscode/tasks.json file (if it doesn’t exist) and paste this configuration (adjust the compiler command to match your setup—replace gcc with clang or cl for MSVC if needed):

{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Compile & Run C/C++",
      "type": "shell",
      "command": "gcc ${file} -o ${fileDirname}/${fileBasenameNoExtension} && ${fileDirname}/${fileBasenameNoExtension}",
      "args": [],
      "group": {
        "kind": "build",
        "isDefault": true
      },
      "problemMatcher": ["$gcc"],
      "presentation": {
        "echo": true,
        "reveal": "always",
        "focus": false,
        "panel": "shared"
      }
    }
  ]
}

3. Install the File Watcher extension. Configure it to trigger your task on save:
   • Open File Watcher settings, add a new watcher.
   • Set "Files to Watch" to **/*.c and **/*.cpp (covers both C and C++ files).
   • Set "Command" to workbench.action.tasks.runTask and "Arguments" to "Compile & Run C/C++".

Important Notes #

• Make sure your compiler (GCC, Clang, MSVC) is properly installed and accessible via your system’s PATH. For Windows, you might need to use MinGW-W64 or the MSVC Build Tools.
• For multi-file projects, adjust the command in tasks.json to include all source files (e.g., gcc file1.c file2.c -o output instead of ${file}).

内容的提问来源于stack exchange，提问作者Amit kumar