C++ from scratch (1): build the vscode environment

Build the vscode environment

Reference:
https://blog.csdn.net/moshiyaofei/article/details/103183742
https://blog.csdn.net/iningwei/article/details/101649090

vscode c++ installation

Also installed this

mingw64 installation

Software download
http://mingw-w64.org/doku.php/download

Specific settings:

after the installation is complete, you need to add \bin to the system environment variables

Confirm whether the installation is successful:

Build the compilation environment

ctrl+shift+p to open the window and select C++ edit

c_cpp_properties.json to start the configuration.

Here you have to enter the installation path yourself.

Select gcc to not report an error.

Create a build task. Press the shortcut key Ctrl+Shift+P in vs code, then Input: task



and then vs code will create tasks.json in the subfolder .vscode under the project folder.

Replace the code as follows

{
    
    
  "version": "2.0.0",
  "tasks": [
    {
    
    
      "label": "build hello world",
      "type": "shell",
      "command": "g++",
      "args": ["-g", "-o", "helloworld", "helloworld.cpp"],
      "group": {
    
    
        "kind": "build",
        "isDefault": true
      }
    }
  ]
}

Among them, the meaning of each field in this code:

command：表示用当前项目使用g++.exe去编译它，
args：表示传到g++中的命令行参数，
label：表示在VS Code Command Palette中显示的名称，可以自己定义喜欢的，
isDefault": true，是为了快捷编译设置的，如果设置为true，那么可以使用Ctrl+Shift+B这个快捷键来编译代码，如果设置为false，那么你必须使用Command Palette 菜单栏下的Run Build Task这个命令来编译它，如下图所示，可以看到Run Build Task这个命令后面有一个Ctrl+Shift+B这个快捷键，就是说明如果在tasks.json文件中设置了isDefault": true的话，你可以使用Ctrl+Shift+B快捷键快速编译代码。

Next, configure the Debug settings. First use Ctrl+Shift+P to open the Command Palette, and then enter launch



to see the configuration in launch.json. The meanings of these fields are as follows:

program：这个字段的值使用helloworld.exe替换默认的program的值，这儿的值和tasks.json文件中设置的名称要一样。
miDebuggerPath：这个字段的值要使用Mingw-w64安装路径心中bin目录下的gdb.exe的路径，我的是：                                              E:\mingw\az\mingw64\bin\gdb.exe
stopAtEntry：C++ extension会在main函数的第一行添加一个断点，stopAtEntry这个字段的值表示是否要让debugger 执行时停留在这个断点，如果设置为true，则debugger执行时会停留在这个断点，如果设置为false，那么debugger执行时不会停留在这个断点。
externalConsole：这个字段设置为true表示在外部控制台中运行程序。

The configured launch.json file is shown in the figure below. When setting the path of miDebuggerPath, you need to "add escape characters", otherwise an error will occur:

Next is the encoding source file, create a new helloworld.cpp file, add code and save.

ctrl+shift+b compile.

Step on the pit

Restart mingw64 after installing vscode, otherwise the project will fail to compile.