1、安装c/c++

2、安装clang

3、配置工程头文件路径，Ctrl+Shift+p, 选择C/C++:Edit Configurateions(JSON)，弹出c_pp_properties.json文件进行配置

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**"
                "${workspaceFolder}/Prebuilt/include"
                "${workspaceFolder}/Prebuilt/include/core"
                "${workspaceFolder}/Prebuilt/include/drivers"
                "${workspaceFolder}/Prebuilt/include/libneul"
                "${workspaceFolder}/Prebuilt/include/middleware"
                "${workspaceFolder}/Prebuilt/include/network"
            ],
            "defines": [],
            "compilerPath": "/opt/compiler/gcc-12/bin/gcc",
            "cStandard": "c17",
            "cppStandard": "gnu++17",
            "intelliSenseMode": "linux-gcc-x64"
        }
    ],
    "version": 4
}

4、如果还是不行，切换成中文显示。安装插件：

Chinese Language Pack for Visual Studio Code。

https://blog.csdn.net/wangzhiqin365/article/details/107174777/