ANSI device drive

This is mentioned in "ANSI device driver" in book C/C ++ programmer practical Daquan-Excellent edition: C/C ++ best programming guide ".

It is similar in shell programming.

If you use a colored prompt to increase personalization, you need to use escape sequences. The escape sequence is a control command that allows shell to execute a special step. Generally, escape sequences start with ESC (which is also the reason for its naming ). In shell, it is represented as ^ [. This representation requires a little time to adapt, or you can use \ 033 to complete the same work (the esc ascii code is expressed in decimal format as 27, = 33 in octal format ). To directly input the escape sequence in shell, press Ctrl-V: Ctrl-v esc.

Escape Sequence	Function	Example
ESC [X; YH	Place the cursor in column Y of row x	ESC [10; 25 h
ESC [xa	Move the cursor up X rows	ESC [1A
ESC [XB	Move the cursor down x rows	ESC [2B
ESC [YC	Right Shift cursor column Y	ESC [10C
ESC [YD	Move cursor left column Y	ESC [10D
ESC [s	Store the current cursor position	ESC [s
ESC [u	Restore cursor position	ESC [u
ESC [2j	Clear the screen and move the cursor to the starting position	ESC [2j
ESC [K	Clear to end of line	ESC [K

 

C language example

Print "Hello word" in Green ":

# Include <stdio. h> Int main (void ){ Const char * const Green = "\ 033 [0; 40; 32 m "; Const char * const normal = "\ 033 [0 m "; Printf ("% Shello world % s \ n", green, normal ); Return 0; }

 

Another useful escape sequence is printf ("\ 033 [2j"), which has the same functions as system (clear. However, the header file unistd. H is not required.

You can use printf ("\ 033 [1 K") to delete a row.