VIM has three modes: General mode, edit mode, command mode.
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Packaging command: TAR-ZCVF name.tar.gz path_and_files
Unpacking command: TAR-ZXVF name.tar.gz
Parameters:
-Z: With gzip properties
-C: Create a parameter directive for a compressed file (the meaning of Create)
-x: Unlock parameter directives for a compressed file
-V: Show All procedures
-F: Use the file name, remember that this parameter is the last parameter, can only be followed by the file name.
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for statements with long expressions and if statements, some spaces can be suitably removed for compactness, such as for (i=0; i<10; i++) and if (a<=b) && (C<=d)
needs to be supplemented
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Learning resources: NetEase Cloud Classroom
Software Engineering (c coding practice) Learning notes (i)