第20章 Mac+VSCode配置C++环境

1. 下载VSCode

1. VSCode下载地址
2. 在mac终端里输入xcode- select --install命令，根据提示安装xcode工具。

2. 安装插件（4个）

1. 打开VScode，点击应用右侧菜单栏
   
2. C/C++（必装）
   
3. Code Runner（必装）
   
4. CodeLLDB（代码调试），不安装这个插件程序调试时，无法在vscode自带的终端里输入参数
   

3. 配置环境

1. 新建文件夹
   
2. 打开文件夹
   
3. 在code下新建001_EvnTest.cpp
   
4. 点击右上角的小齿轮
   
5. 选择点击C/C++：gcc或者C/C++：clang
   
6. 会自动添加launch.json和tasks.json文件，并自动打开launch.json文件
   
7. 配置launch.json和tasks.json文件

• launch.json文件配置

  {"configurations": [{"name": "C/C++: g++ build and debug active file","type": "cppdbg","request": "launch","program": "${fileDirname}/${fileBasenameNoExtension}","args": [],"stopAtEntry": false,"cwd": "${fileDirname}","environment": [],"externalConsole": false,"MIMode": "lldb","preLaunchTask": "C/C++: g++ build active file"}],"version": "2.0.0"
  }
  

• task.json文件配置

  {"tasks": [{"type": "cppbuild","label": "C/C++: g++ build active file","command": "/usr/bin/g++","args": ["-fdiagnostics-color=always","-g","${file}","-o","${fileDirname}/${fileBasenameNoExtension}"],"options": {"cwd": "${fileDirname}"},"problemMatcher": ["$gcc"],"group": "build","detail": "Task generated by Debugger."}],"version": "2.0.0"
  }
  

4. 运行程序

1. 运行程序，点击Run Code运行程序，程序会在终端中运行
   
2. 调试程序，不要使用右上角的debug，使用左侧菜单栏中的调试
   

5. 遇到的问题

1. 如果在运行程序的时候，遇到问题Undefined symbols for architecture x86_64：

   Undefined symbols for architecture x86_64:"_main", referenced from:implicit entry/start for main executable
   ld: symbol(s) not found for architecture x86_64
   clang: error: linker command failed with exit code 1 (use -v to see invocation)
   

   原因：cpp文件的文件名不合规，比如用了特殊符合，空格等。