Command name: copy
Command function: copy files
Command format: copy [drive letter:][path name][file name] [drive letter:][path name][file name]
Instructions for use:
1. "Drive letter": Specify the letter of the disk drive to create a subdirectory, if omitted, it will be the current drive.
2. "Path name": the parent directory name of the subdirectory to be created, if omitted, it is the current directory.
3. "File name": must be the full name of the file, including the suffix.
Example of use:
1.copy D:\a\a.txt D:\b\
Copy the file to the latter directory
2.copy D:\a\a.txt D:\b\b.txt
Copy the contents of the previous file to the next file
3.copy D:\a\ D:\b\
Copy files in non-subdirectories of the previous folder to the next folder