Modify the vim configuration file

1. Configuration File Location
Under the/etc/directory, there is a file named vimrc, which is a public Vim configuration file in the system and is valid for all users. In each user's home directory, you can create a private configuration file named ". vimrc ". For example, A. vimrc file already exists in the/root directory.
2. Set syntax highlighting
1) Open vimrc and add the following statement to highlight the Syntax:
Syntax on
2) If the syntax is still not highlighted, add the following statement to the profile file in the/etc directory:
Export term = xterm-color

3. Set Windows C/C ++ auto indent (Add the following set statement to vimrc)
1) set the (soft) tab width to 4:
Set tabstop = 4
Set softtabstop = 4
2) set the number of spaces for indentation to 4.
Set shiftwidth = 4
3) Set automatic indent: that is, the indent value of each line is equal to that of the previous line; Use noautoindent to cancel the settings:
Set autoindent
4) set the automatic indent mode in C/C ++ language:
Set cindent
5) set the specific indent mode for C/C ++ language (taking my windows style as an example ):
Set cinoptions = {s, T0, N-2, P2s, (03 S, =. 5 S,> 1 s, = 1 s,: 1 s
6) to display the line number of the text on the left, use the following statement:
Set nu
7) Set Tab to four spaces
Set Ts = 4 (Note: ts is the abbreviation of tabstop, with four spaces in the tab width)
Set expandtab
8) Finally, add the following statements if they do not exist:
If & term = "xterm"
Set t_co = 8
Set t_sb = ^ [4% DM
Set t_sf = ^ [3% DM

Endif

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On the terminal
Run the following command to edit the vimrc configuration file: (you can also use Shift + during file Editing: Enter the corresponding command to edit the file)
Sudo Vim/etc/Vim/vimrc
Or sudo gedit/etc/Vim/vimrc

1. display the row number

Add a new line at the end of the file and enter SET nu

2. syntax highlighting
Find "syntax on

  This line removes the double quotation marks. Double quotation marks indicate comments.

3. Automatic indent

Add a row at the end of the file and enter SET autoindent.
After adding a row, enter       Set cindent
Autoindent indicates automatic indent, and cindent indicates automatic indent for C language syntax.

NOTE: If Vim does not take any action after the preceding settings are configured, upgrade Vim to the latest version. Generally, you only need to enter the following command on the terminal: sudo apt-Get install Vim