#杂七杂八常识 

``` shell
@echo 删除develop_v8.7x_2020目录和子目录的所有文件和文件夹
del /f /s /q "C:\Users\liaoyourong\Downloads\code\c_develop_2020\*.*"
cd "C:\Users\liaoyourong\Downloads\code"
rd /s /q  "C:\Users\liaoyourong\Downloads\code\c_develop_2020"
@echo 已经全部删除
@pause
```