查看“︁^ 表示法”︁的源代码

[[分类:字符实例]]
{{InfoBox
|name=^表示法
|eng_name=caret notation
|aliases=脱字符表示法
}}
{{#seo:
|keywords=^表示法
|description=介绍了空字符的由来和相关的表示，以及常见用途。
|modified_time={{REVISIONYEAR}}-{{REVISIONMONTH}}-{{REVISIONDAY2}}
|published_time=2025-09-14
}}
{{非标准翻译}}
'''^ 表示法'''('''caret notation''')是一种常见于终端等纯字符界面的表达 [[ASCII]] 范围内控制字符的方式，使用一个 caret 字符（<code>^</code>）和一个可见字符表示一个控制字符，这一字符相当于 {{Hex|40}} 位被反转。

尽管展示为类似一个 <code>0x4E ^</code> 字符加一个普通字符的形式，这是对一个本身不可见字符的展示，任何情况下连续出现这两个字符和直接出现这一个字符的展示并不等价。在终端输入时如果支持，可以使用 Control 键与对应字母（特别地， <code>^@</code> 的 <code>@</code> 通常不需要按 <code>Shift+2</code> 而是直接用 <code>2</code> ）输入这一个字符。也有的终端中这样的组合键会直接触发对应功能生效，如果想要当作文本输入，需要先使用快捷键 <code>^V</code> 即 <code>Ctrl+V</code> ，这个快捷键组合会将下一个这样的组合当作字符输入。

{| class='wikitable' style='text-align:center;margin:0 auto;border-width:2px' width='100%'
! colspan=17 | ^ 表示法
|-
! -
! _0 <br/> <code>??? 0000</code>
! _1 <br/> <code>??? 0001</code>
! _2 <br/> <code>??? 0010</code>
! _3 <br/> <code>??? 0011</code>
! _4 <br/> <code>??? 0100</code>
! _5 <br/> <code>??? 0101</code>
! _6 <br/> <code>??? 0110</code>
! _7 <br/> <code>??? 0111</code>
! _8 <br/> <code>??? 1000</code>
! _9 <br/> <code>??? 1001</code>
! _A <br/> <code>??? 1010</code>
! _B <br/> <code>??? 1011</code>
! _C <br/> <code>??? 1100</code>
! _D <br/> <code>??? 1101</code>
! _E <br/> <code>??? 1110</code>
! _F <br/> <code>??? 1111</code>
|-
! 0_ <br/> <code>000 ????</code> 
| <small style="font-size:0.6em"><span title="NULL">NUL</span> <br/> </small> <code>^@</code>
| <small style="font-size:0.6em"><span title="START OF HEADING">SOH</span> <br/> </small> <code>^A</code>
| <small style="font-size:0.6em"><span title="START OF TEXT">STX</span> <br/> </small> <code>^B</code>
| <small style="font-size:0.6em"><span title="END OF TEXT">ETX</span> <br/> </small> <code>^C</code>
| <small style="font-size:0.6em"><span title="END OF TRANSMISSION">EOT</span> <br/> </small> <code>^D</code>
| <small style="font-size:0.6em"><span title="ENQUIRY">ENQ</span> <br/> </small> <code>^E</code>
| <small style="font-size:0.6em"><span title="ACKNOWLEDGE">ACK</span> <br/> </small> <code>^F</code>
| <small style="font-size:0.6em"><span title="ALERT">BEL</span> <br/> </small> <code>^G</code>
| <small style="font-size:0.6em"><span title="BACKSPACE">BS</span> <br/> </small> <code>^H</code>
| <small style="font-size:0.6em"><span title="CHARACTER TABULATION / HORIZONTAL TABULATION">HT</span> <br/> <span title="TABULATION">TAB</span> <br/> </small> <code>^I</code>
| <small style="font-size:0.6em"><span title="LINE FEED">LF</span><br/><span title="NEW LINE">NL</span><br/><span title="END OF LINE">EOL</span> <br/> </small> <code>^J</code>
| <small style="font-size:0.6em"><span title="LINE TABULATION / VERTICAL TABULATION">VT</span> <br/> </small> <code>^K</code>
| <small style="font-size:0.6em"><span title="FORM FEED">FF</span><br/><span title="NEW PAGE">NP</span> <br/> </small> <code>^L</code>
| <small style="font-size:0.6em"><span title="CARRIAGE RETURN">CR</span> <br/> </small> <code>^M</code>
| <small style="font-size:0.6em"><span title="SHIFT OUT">SO</span> <br/> <span title="LOCKING-SHIFT ONE">LS1</span> <br/> </small> <code>^N</code>
| <small style="font-size:0.6em"><span title="SHIFT IN">SI</span><br/><span title="LOCKING-SHIFT ZERO">LS0</span> <br/> </small> <code>^O</code>
|-
! 1_ <br/> <code>001 ????</code> 
| <small style="font-size:0.6em"><span title="DATA LINK ESCAPE">DLE</span> <br/> </small> <code>^P</code>
| <small style="font-size:0.6em"><span title="DEVICE CONTROL ONE">DC1</span> <br/> <span title="TRANSMIT ON">XON</span> <br/> </small> <code>^Q</code>
| <small style="font-size:0.6em"><span title="DEVICE CONTROL TWO">DC2</span> <br/> </small> <code>^R</code>
| <small style="font-size:0.6em"><span title="DEVICE CONTROL THREE">DC3</span> <br/> <span title="TRANSMIT OFF">XOFF</span> <br/> </small> <code>^S</code>
| <small style="font-size:0.6em"><span title="DEVICE CONTROL FOUR">DC4</span> <br/> </small> <code>^T</code>
| <small style="font-size:0.6em"><span title="NEGATIVE ACKNOWLEDGE">NAK</span><br/> </small> <code>^U</code>
| <small style="font-size:0.6em"><span title="SYNCHRONOUS IDLE">SYN</span><br/> </small> <code>^V</code>
| <small style="font-size:0.6em"><span title="END OF TRANSMISSION BLOCK">ETB</span><br/> </small> <code>^W</code>
| <small style="font-size:0.6em"><span title="CANCEL">CAN</span><br/></small> <code>^X</code>
| <small style="font-size:0.6em"><span title="END OF MEDIUM">EM</span><br/></small> <code>^Y</code>
| <small style="font-size:0.6em"><span title="SUBSTITUTE">SUB</span><br/></small> <code>^Z</code>
| <small style="font-size:0.6em"><span title="ESCAPE">ESC</span><br/></small> <code>^[</code>
| <small style="font-size:0.6em"><span title="INFORMATION SEPARATOR FOUR / FILE SEPARATOR">FS</span> <br/></small> <code>^\</code>
| <small style="font-size:0.6em"><span title="INFORMATION SEPARATOR THREE / GROUP SEPARATOR">GS</span><br/></small> <code>^]</code>
| <small style="font-size:0.6em"><span title="INFORMATION SEPARATOR TWO / RECORD SEPARATOR">RS</span><br/></small> <code>^^</code>
| <small style="font-size:0.6em"><span title="INFORMATION SEPARATOR ONE / UNIT SEPARATOR">US</span><br/></small> <code>^_</code>
|-
! 2_ <br/> <code>010 ????</code> 
| <small style="font-size:0.6em"><span title="SPACE">SP</span><br/>空格</small>
| !
| "
| #
| $
| %
| &
| '
| (
| )
| *
| +
| ,
| -
| .
| /
|-
! 3_ <br/> <code>011 ????</code>
| 0
| 1
| 2
| 3
| 4
| 5
| 6
| 7
| 8
| 9
| :
| ;
| <
| =
| >
| ?
|-
! 4_ <br/> <code>100 ????</code> 
| @
| A
| B
| C
| D
| E
| F
| G
| H
| I
| J
| K
| L
| M
| N
| O
|-
! 5_ <br/> <code>101 ????</code> 
| P
| Q
| R
| S
| T
| U
| V
| W
| X
| Y
| Z
| [
| \
| ]
| ^
| _
|-
! 6_ <br/> <code>110 ????</code> 
| `
| a
| b
| c
| d
| e
| f
| g
| h
| i
| j
| k
| l
| m
| n
| o
|-
! 7_ <br/> <code>111 ????</code> 
| p
| q
| r
| s
| t
| u
| v
| w
| x
| y
| z
| {
| <nowiki>|</nowiki>
| }
| ~
| <small style="font-size:0.6em"><span title="DELETE">DEL</span><br/></small><code>^?</code>
|}