CHDIR Displays the name of or changes the current directory.

CHDIR 显示当前目录的名称或将其更改。

The CD command is short for the CHDIR command, enter a folder.

CD命令是CHDIR命令的简称，作用是进入某个文件夹。

After we complete our processing, we can pass the pathname obtained from getcwd to chdir to return to our starting location in the file system.

在程序完成后，我们可以通过getcwd保存的路径返回到开始的位置。