vscode 大纲预览找不到文件符号

问题：

        vscode 大纲 文档中找不到符号

原因：

        缺少c/c++必要插件

解决办法：

        安装插件：

        名称: C/C++
        ID: ms-vscode.cpptools
        说明: C/C++ IntelliSense, debugging, and code browsing.
        版本: 1.8.4
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools

        名称: C/C++ Extension Pack
        ID: ms-vscode.cpptools-extension-pack
        说明: Popular extensions for C++ development in Visual Studio Code.
        版本: 1.1.0
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools-extension-pack

        名称: C++ Intellisense
        ID: austin.code-gnu-global
        说明: C/C++ Intellisense with the help of GNU Global tags
        版本: 0.2.2
        发布者: austin
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=austin.code-gnu-global

        名称: CMake
        ID: twxs.cmake
        说明: CMake langage support for Visual Studio Code
        版本: 0.0.17
        发布者: twxs
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=twxs.cmake

        名称: CMake Tools
        ID: ms-vscode.cmake-tools
        说明: Extended CMake support in Visual Studio Code
        版本: 1.9.2
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cmake-tools

        名称: Doxygen Documentation Generator
        ID: cschlosser.doxdocgen
        说明: Let me generate Doxygen documentation from your source code for you.
        版本: 1.4.0
        发布者: Christoph Schlosser
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=cschlosser.doxdocgen

        名称: GitLens — Git supercharged
        ID: eamodio.gitlens
        说明: Supercharge the Git capabilities built into Visual Studio Code — Visualize code authorship at a glance via Git blame         annotations and code lens, seamlessly navigate and explore Git repositories, gain valuable insights via powerful comparison commands, and so much more
        版本: 11.7.0
        发布者: GitKraken
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=eamodio.gitlens

        名称: markdownlint
        ID: DavidAnson.vscode-markdownlint
        说明: Markdown linting and style checking for Visual Studio Code
        版本: 0.46.0
        发布者: David Anson
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=DavidAnson.vscode-markdownlint

        名称: Better C++ Syntax
        ID: jeff-hykin.better-cpp-syntax
        说明: The bleeding edge of the C++ syntax
        版本: 1.15.13
        发布者: Jeff Hykin
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=jeff-hykin.better-cpp-syntax

        名称: Bracket Pair Colorizer
        ID: CoenraadS.bracket-pair-colorizer
        说明: A customizable extension for colorizing matching brackets
        版本: 1.0.62
        发布者: CoenraadS
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=CoenraadS.bracket-pair-colorizer

        名称: C/C++ Themes
        ID: ms-vscode.cpptools-themes
        说明: UI Themes for C/C++ extension.
        版本: 1.0.0
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools-themes

        名称: GitHub Plus Theme
        ID: thenikso.github-plus-theme
        说明: A GitHub inspired color theme for VSCode code and interface!
        版本: 1.4.2
        发布者: thenikso
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=thenikso.github-plus-theme

        名称: GitHub Theme
        ID: GitHub.github-vscode-theme
        说明: GitHub theme for VS Code
        版本: 6.0.0
        发布者: GitHub
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=GitHub.github-vscode-theme

        名称: Material Icon Theme
        ID: PKief.material-icon-theme
        说明: Material Design Icons for Visual Studio Code
        版本: 4.13.0
        发布者: Philipp Kief
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=PKief.material-icon-theme

        名称: One Dark Pro
        ID: zhuangtongfa.material-theme
        说明: Atom‘s iconic One Dark theme for Visual Studio Code
        版本: 3.13.20
        发布者: binaryify
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=zhuangtongfa.Material-theme

        名称: Remote - Containers
        ID: ms-vscode-remote.remote-containers
        说明: Open any folder or repository inside a Docker container and take advantage of Visual Studio Code's full feature set.
        版本: 0.217.4
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers

        名称: Remote - SSH
        ID: ms-vscode-remote.remote-ssh
        说明: Open any folder on a remote machine using SSH and take advantage of VS Code's full feature set.
        版本: 0.74.0
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-ssh

        名称: Remote - SSH: Editing Configuration Files
        ID: ms-vscode-remote.remote-ssh-edit
        说明: Edit SSH configuration files
        版本: 0.74.0
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-ssh-edit

        名称: Remote - WSL
        ID: ms-vscode-remote.remote-wsl
        说明: Open any folder in the Windows Subsystem for Linux (WSL) and take advantage of Visual Studio Code's full feature set.
        版本: 0.64.2
        发布者: Microsoft
        VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-wsl