Windows(cmd)批处理-在子例程中使用括号

d7v8vwbk  于 2023-10-22  发布在  Windows
关注(0)|答案(1)|浏览(158)

我经常在:LABEL中看到括号( ... )的示意图。
我读了圆括号/方括号，但我不太明白如何在子例程中解释这一点。
（例如https://ss64.com/nt/syntax-brackets.html）

使用括号内的变量

  • CMD shell将扩展[读入内存]代码块开头的所有变量，并使用这些值，即使变量的值在代码块中发生了更改。打开DelayedExpansion将强制shell在每行的开头读取变量。*

不幸的是，我在互联网上找不到对调用或子例程的具体描述。
（例如https://ss64.com/nt/call.html、https://ss64.com/nt/syntax-functions.html）
我想知道它是否只是一种代码风格（例如，（这是我目前的猜测。
举个简单的例子：

  1. @ECHO OFF
  3. CALL :ShortLabel
  4. CALL :LongLabel
  5. GOTO :EndOfBatch
  7. :ShortLabel
  8. ECHO I'm called "%~0" .
  9. EXIT /B
  11. :LongLabel
  12. (
  13.    ECHO I'm called "%~0" , because I have two extra lines.
  14.    EXIT /B
  15. )
  17. :EndOfBatch
  18. PAUSE
  19. EXIT /B

如果没有，我希望你能简要解释一下。

更新：

由于我以前的“时间测量”是垃圾，这里有一个更好的版本（我希望）。第一个调用只是复制粘贴出第二个括号：

  1. @ECHO OFF
  3. SETLOCAL EnableExtensions EnableDelayedExpansion
  5. REM *** This string has the maximum length of 8191
  6. set "str=."
  7. FOR /L %%n in (1 1 13) DO SET "str=!str:~-4000!!str:~-4000!"
  8. (set^ string=!str!!str:~-191!)
  10. SET /A Loops=3000
  12. TITLE A - StrLenNoLocal
  13. CALL :TimeStamp StrLenNoLocalStart
  14. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocal LenDummyStrLenNoLocalA string %%a
  15. CALL :TimeStamp StrLenNoLocalEnd
  17. TITLE A - StrLenNoLocalBrackets
  18. CALL :TimeStamp StrLenNoLocalBracketsStart
  19. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocalBrackets LenDummyStrLenNoLocalBracketsA string %%a
  20. CALL :TimeStamp StrLenNoLocalBracketsEnd
  22. TITLE A - StrLenLocal
  23. CALL :TimeStamp StrLenLocalStart
  24. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocal LenDummyStrLenLocalA string %%a
  25. CALL :TimeStamp StrLenLocalEnd
  27. TITLE A - StrLenLocalBrackets
  28. CALL :TimeStamp StrLenLocalBracketsStart
  29. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocalBrackets LenDummyStrLenLocalBracketsA string %%a
  30. CALL :TimeStamp StrLenLocalBracketsEnd
  32. CALL :MeasureTime StrLenNoLocalTime StrLenNoLocalStart StrLenNoLocalEnd
  33. CALL :MeasureTime StrLenNoLocalBracketsTime StrLenNoLocalBracketsStart StrLenNoLocalBracketsEnd
  34. CALL :MeasureTime StrLenLocalTime StrLenLocalStart StrLenLocalEnd
  35. CALL :MeasureTime StrLenLocalBracketsTime StrLenLocalBracketsStart StrLenLocalBracketsEnd
  37. REM Invert order
  39. TITLE B - StrLenLocalBrackets
  40. CALL :TimeStamp StrLenLocalBracketsStart
  41. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocalBrackets LenDummyStrLenLocalBracketsB string %%a
  42. CALL :TimeStamp StrLenLocalBracketsEnd
  44. TITLE B - StrLenLocal
  45. CALL :TimeStamp StrLenLocalStart
  46. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocal LenDummyStrLenLocalB string %%a
  47. CALL :TimeStamp StrLenLocalEnd
  49. TITLE B - StrLenNoLocalBrackets
  50. CALL :TimeStamp StrLenNoLocalBracketsStart
  51. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocalBrackets LenDummyStrLenNoLocalBracketsB string %%a
  52. CALL :TimeStamp StrLenNoLocalBracketsEnd
  54. TITLE B - StrLenNoLocal
  55. CALL :TimeStamp StrLenNoLocalStart
  56. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocal LenDummyStrLenNoLocalB string %%a
  57. CALL :TimeStamp StrLenNoLocalEnd
  59. TITLE Results
  60. ECHO.
  62. ECHO Time StrLenNoLocal          A :  !StrLenNoLocalTime!
  63. ECHO Time StrLenNoLocalBrackets  A :  !StrLenNoLocalBracketsTime!
  64. ECHO Time StrLenLocal            A :  !StrLenLocalTime!
  65. ECHO Time StrLenLocalBrackets    A :  !StrLenLocalBracketsTime!
  66. ECHO StrLen !LenDummyStrLenNoLocalA! / !LenDummyStrLenNoLocalBracketsA! / !LenDummyStrLenLocalA! / !LenDummyStrLenLocalBracketsA!
  67. ECHO.
  69. CALL :MeasureTime StrLenNoLocalTime StrLenNoLocalStart StrLenNoLocalEnd
  70. CALL :MeasureTime StrLenNoLocalBracketsTime StrLenNoLocalBracketsStart StrLenNoLocalBracketsEnd
  71. CALL :MeasureTime StrLenLocalTime StrLenLocalStart StrLenLocalEnd
  72. CALL :MeasureTime StrLenLocalBracketsTime StrLenLocalBracketsStart StrLenLocalBracketsEnd
  74. ECHO Time StrLenNoLocal          B :  !StrLenNoLocalTime!
  75. ECHO Time StrLenNoLocalBrackets  B :  !StrLenNoLocalBracketsTime!
  76. ECHO Time StrLenLocal            B :  !StrLenLocalTime!
  77. ECHO Time StrLenLocalBrackets    B :  !StrLenLocalBracketsTime!
  78. ECHO StrLen !LenDummyStrLenNoLocalB! / !LenDummyStrLenNoLocalBracketsB! / !LenDummyStrLenLocalB! / !LenDummyStrLenLocalBracketsB!
  79. ECHO.
  81. GOTO :EndOfBatch
  83. REM https://stackoverflow.com/a/5841587/1378342
  84. REM The original "function" is missing the /A for a number twice, which is wrong in my opinion. It seems to speed up the output.
  85. REM I also added missing cosmetic double quotes for "set" to make it more accurate
  87. :StrLenNoLocal
  88. ECHO Loop %~3 / %Loops%
  89. (SET^ tmp=!%~2!)
  90. IF DEFINED tmp (
  91.   SET /A "len=1"
  92.   FOR %%P IN (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) DO (
  93.      IF "!tmp:~%%P,1!" NEQ "" (
  94.         SET /A "len+=%%P"
  95.         SET "tmp=!tmp:~%%P!"
  96.      )
  97.   )
  98. ) ELSE (
  99.   SET /A "len=0"
  100. )
  101. SET /A "%~1=!len!"
  102. EXIT /B
  104. :StrLenNoLocalBrackets
  105. (
  106.    ECHO Loop %~3 / %Loops%
  107.    (SET^ tmp=!%~2!)
  108.    IF DEFINED tmp (
  109.       SET /A "len=1"
  110.       FOR %%P IN (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) DO (
  111.          IF "!tmp:~%%P,1!" NEQ "" (
  112.             SET /A "len+=%%P"
  113.             SET "tmp=!tmp:~%%P!"
  114.          )
  115.       )
  116.    ) ELSE (
  117.       SET /A "len=0"
  118.    )
  119.    SET /A "%~1=!len!"
  120.    EXIT /B
  121. )
  123. :StrLenLocal
  124. echo Loop %~3 / %Loops% & setlocal EnableDelayedExpansion & (set^ tmp=!%~2!)
  125. if defined tmp (
  126.   set /a "len=1"
  127.   for %%P in (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) do (
  128.      if "!tmp:~%%P,1!" NEQ "" (
  129.         set /a "len+=%%P"
  130.         set "tmp=!tmp:~%%P!"
  131.      )
  132.   )
  133. ) else (
  134.     set /a "len=0"
  135. )
  136. endlocal & set /a "%~1=%len%" & exit /b
  138. :StrLenLocalBrackets
  139. (
  140.    echo Loop %~3 / %Loops%
  141. )
  142. (
  143.    setlocal EnableDelayedExpansion
  144.    (set^ tmp=!%~2!)
  145.    if defined tmp (
  146.       set /a "len=1"
  147.       for %%P in (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) do (
  148.          if "!tmp:~%%P,1!" NEQ "" (
  149.             set /a "len+=%%P"
  150.             set "tmp=!tmp:~%%P!"
  151.          )
  152.       )
  153.    ) else (
  154.         set /a "len=0"
  155.    )
  156. )
  157. (
  158.    endlocal
  159.    set /a "%~1=%len%"
  160.    exit /b
  161. )
  164. :TimeStamp
  165. SET /A %~1=1%time:~-5,-3%%time:~-2%
  166. EXIT /B
  168. :MeasureTime
  169. SET /A %~1=!%~3!-!%~2!
  170. IF !%~1! LSS 0 SET /A %~1=6000+!%~1!
  171. SET %~1=!%~1:~0,-2!.!%~1:~-2!sec
  172. EXIT /B
  175. :EndOfBatch
  176. PAUSE
  177. ENDLOCAL
  178. GOTO :EOF

输出量：

  1. Time StrLenNoLocal          A :  17.57sec
  2. Time StrLenNoLocalBrackets  A :  15.06sec
  3. Time StrLenLocal            A :  17.70sec
  4. Time StrLenLocalBrackets    A :  18.09sec
  5. StrLen 8191 / 8191 / 8191 / 8191
  7. Time StrLenNoLocal          B :  17.05sec
  8. Time StrLenNoLocalBrackets  B :  14.56sec
  9. Time StrLenLocal            B :  17.39sec
  10. Time StrLenLocalBrackets    B :  17.84sec
  11. StrLen 8191 / 8191 / 8191 / 8191

( ... )版本比较快。
只要大家没有异议，我的结论是：
我更喜欢行数少的代码，只要它不影响可读性。* 但是 * 如果这两个括号可以使脚本更快一点，而且不会造成任何伤害-为什么不呢？;）

windows

1条答案

按热度按时间
rsl1atfo

rsl1atfo1#

在“如果”之后...

  • 我的措施毫无意义
  • 我测量超时/ ping
  • 我把所有的东西都放在括号里
  • 我调用方括号内的嵌套标签

思考：

  1. @ECHO OFF
  3. SETLOCAL EnableExtensions EnableDelayedExpansion
  5. REM *** This string has the maximum length of 8191
  6. set "str=."
  7. FOR /L %%n in (1 1 13) DO SET "str=!str:~-4000!!str:~-4000!"
  8. (set^ string=!str!!str:~-191!)
  10. SET /A Loops=3000
  12. TITLE A - StrLenNoLocal
  13. CALL :TimeStamp StrLenNoLocalStart
  14. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocal LenDummyStrLenNoLocalA string %%a
  15. CALL :TimeStamp StrLenNoLocalEnd
  17. TITLE A - StrLenNoLocalBrackets
  18. CALL :TimeStamp StrLenNoLocalBracketsStart
  19. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocalBrackets LenDummyStrLenNoLocalBracketsA string %%a
  20. CALL :TimeStamp StrLenNoLocalBracketsEnd
  22. TITLE A - StrLenLocal
  23. CALL :TimeStamp StrLenLocalStart
  24. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocal LenDummyStrLenLocalA string %%a
  25. CALL :TimeStamp StrLenLocalEnd
  27. TITLE A - StrLenLocalBrackets
  28. CALL :TimeStamp StrLenLocalBracketsStart
  29. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocalBrackets LenDummyStrLenLocalBracketsA string %%a
  30. CALL :TimeStamp StrLenLocalBracketsEnd
  32. CALL :MeasureTime StrLenNoLocalTime StrLenNoLocalStart StrLenNoLocalEnd
  33. CALL :MeasureTime StrLenNoLocalBracketsTime StrLenNoLocalBracketsStart StrLenNoLocalBracketsEnd
  34. CALL :MeasureTime StrLenLocalTime StrLenLocalStart StrLenLocalEnd
  35. CALL :MeasureTime StrLenLocalBracketsTime StrLenLocalBracketsStart StrLenLocalBracketsEnd
  37. REM Messure Timeout 5sec
  38. TITLE Timeout 5sec
  39. CALL :TimeStamp TimeoutStart
  40. timeout /NOBREAK /T 5 >NUL
  41. CALL :TimeStamp TimeoutEnd
  42. CALL :MeasureTime TimeoutTime TimeoutStart TimeoutEnd
  44. REM Ping...
  45. TITLE Ping 5000
  46. CALL :TimeStamp PingStart
  47. ping 1.2.3.4 -n 1 -w 5000 >NUL
  48. CALL :TimeStamp PingEnd
  49. CALL :MeasureTime PingTime PingStart PingEnd
  51. REM Ping 50 * 100
  52. TITLE PingOneHundredTimes
  53. CALL :TimeStamp PingOneHundredTimesStart
  54. CALL :PingOneHundredTimes
  55. CALL :TimeStamp PingOneHundredTimesEnd
  57. TITLE PingOneHundredTimesBrackets
  58. CALL :TimeStamp PingOneHundredTimesBracketsStart
  59. CALL :PingOneHundredTimesBrackets
  60. CALL :TimeStamp PingOneHundredTimesBracketsEnd
  62. CALL :MeasureTime PingOneHundredTimesTime PingOneHundredTimesStart PingOneHundredTimesEnd
  63. CALL :MeasureTime PingOneHundredTimesBracketsTime PingOneHundredTimesBracketsStart PingOneHundredTimesBracketsEnd
  65. REM Invert order
  67. TITLE B - StrLenLocalBrackets
  68. CALL :TimeStamp StrLenLocalBracketsStart
  69. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocalBrackets LenDummyStrLenLocalBracketsB string %%a
  70. CALL :TimeStamp StrLenLocalBracketsEnd
  72. TITLE B - StrLenLocal
  73. CALL :TimeStamp StrLenLocalStart
  74. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocal LenDummyStrLenLocalB string %%a
  75. CALL :TimeStamp StrLenLocalEnd
  77. TITLE B - StrLenNoLocalBrackets
  78. CALL :TimeStamp StrLenNoLocalBracketsStart
  79. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocalBrackets LenDummyStrLenNoLocalBracketsB string %%a
  80. CALL :TimeStamp StrLenNoLocalBracketsEnd
  82. TITLE B - StrLenNoLocal
  83. CALL :TimeStamp StrLenNoLocalStart
  84. FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocal LenDummyStrLenNoLocalB string %%a
  85. CALL :TimeStamp StrLenNoLocalEnd
  87. TITLE Results
  88. ECHO.
  90. REM "Empty" Timestamp Measure
  91. CALL :TimeStamp TimestampStart
  92. CALL :TimeStamp TimestampEnd
  93. CALL :MeasureTime TimestampTime TimestampStart TimestampEnd
  95. ECHO Time StrLenNoLocal          A :  !StrLenNoLocalTime!
  96. ECHO Time StrLenNoLocalBrackets  A :  !StrLenNoLocalBracketsTime!
  97. ECHO Time StrLenLocal            A :  !StrLenLocalTime!
  98. ECHO Time StrLenLocalBrackets    A :  !StrLenLocalBracketsTime!
  99. ECHO StrLen !LenDummyStrLenNoLocalA! / !LenDummyStrLenNoLocalBracketsA! / !LenDummyStrLenLocalA! / !LenDummyStrLenLocalBracketsA!
  100. ECHO.
  102. CALL :MeasureTime StrLenNoLocalTime StrLenNoLocalStart StrLenNoLocalEnd
  103. CALL :MeasureTime StrLenNoLocalBracketsTime StrLenNoLocalBracketsStart StrLenNoLocalBracketsEnd
  104. CALL :MeasureTime StrLenLocalTime StrLenLocalStart StrLenLocalEnd
  105. CALL :MeasureTime StrLenLocalBracketsTime StrLenLocalBracketsStart StrLenLocalBracketsEnd
  107. ECHO Time StrLenNoLocal          B :  !StrLenNoLocalTime!
  108. ECHO Time StrLenNoLocalBrackets  B :  !StrLenNoLocalBracketsTime!
  109. ECHO Time StrLenLocal            B :  !StrLenLocalTime!
  110. ECHO Time StrLenLocalBrackets    B :  !StrLenLocalBracketsTime!
  111. ECHO StrLen !LenDummyStrLenNoLocalB! / !LenDummyStrLenNoLocalBracketsB! / !LenDummyStrLenLocalB! / !LenDummyStrLenLocalBracketsB!
  112. ECHO.
  113. ECHO "Empty" Timestamp Measure   :  !TimestampTime!
  114. ECHO Timeout /T 5                :  !TimeoutTime!
  115. ECHO ping 1.2.3.4 -n 1 -w 5000   :  !PingTime!
  116. ECHO PingOneHundredTimes         :  !PingOneHundredTimesTime!
  117. ECHO PingOneHundredTimesBrackets :  !PingOneHundredTimesBracketsTime!
  118. ECHO.
  120. SET AREYOUSURE=n
  121. SET /P "AREYOUSURE=Do you like to start over again inside brackets (y/[n]) ? "
  122. IF /I "!AREYOUSURE!" EQU "y" CALL :DoItAgain
  124. REM Test if labels inside brackets still works...
  126. REM Label inside a Label with brackets
  127. ECHO.
  128. CALL :LabelBrackets
  129. CALL :LabelInsideLabelBrackets
  130. ECHO.
  131. REM Label inside a Label with brackets without Exit after LabelBracketsWOExit
  132. CALL :LabelBracketsWOExit
  133. CALL :LabelInsideLabelBracketsWOExit
  134. ECHO.
  137. GOTO :EndOfBatch
  139. REM https://stackoverflow.com/a/5841587/1378342
  140. REM The original "function" is missing the /A for a number twice, which is wrong in my opinion. It seems to speed up the output.
  141. REM I also added missing cosmetic double quotes for "set" to make it more accurate
  143. :StrLenNoLocal
  144. ECHO Loop %~3 / %Loops%
  145. (SET^ tmp=!%~2!)
  146. IF DEFINED tmp (
  147.   SET /A "len=1"
  148.   FOR %%P IN (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) DO (
  149.      IF "!tmp:~%%P,1!" NEQ "" (
  150.         SET /A "len+=%%P"
  151.         SET "tmp=!tmp:~%%P!"
  152.      )
  153.   )
  154. ) ELSE (
  155.   SET /A "len=0"
  156. )
  157. SET /A "%~1=!len!"
  158. EXIT /B
  160. :StrLenNoLocalBrackets
  161. (
  162.    ECHO Loop %~3 / %Loops%
  163.    (SET^ tmp=!%~2!)
  164.    IF DEFINED tmp (
  165.       SET /A "len=1"
  166.       FOR %%P IN (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) DO (
  167.          IF "!tmp:~%%P,1!" NEQ "" (
  168.             SET /A "len+=%%P"
  169.             SET "tmp=!tmp:~%%P!"
  170.          )
  171.       )
  172.    ) ELSE (
  173.       SET /A "len=0"
  174.    )
  175.    SET /A "%~1=!len!"
  176.    EXIT /B
  177. )
  179. :StrLenLocal
  180. echo Loop %~3 / %Loops% & setlocal EnableDelayedExpansion & (set^ tmp=!%~2!)
  181. if defined tmp (
  182.   set /a "len=1"
  183.   for %%P in (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) do (
  184.      if "!tmp:~%%P,1!" NEQ "" (
  185.         set /a "len+=%%P"
  186.         set "tmp=!tmp:~%%P!"
  187.      )
  188.   )
  189. ) else (
  190.     set /a "len=0"
  191. )
  192. endlocal & set /a "%~1=%len%" & exit /b
  194. :StrLenLocalBrackets
  195. (
  196.    echo Loop %~3 / %Loops%
  197. )
  198. (
  199.    setlocal EnableDelayedExpansion
  200.    (set^ tmp=!%~2!)
  201.    if defined tmp (
  202.       set /a "len=1"
  203.       for %%P in (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) do (
  204.          if "!tmp:~%%P,1!" NEQ "" (
  205.             set /a "len+=%%P"
  206.             set "tmp=!tmp:~%%P!"
  207.          )
  208.       )
  209.    ) else (
  210.         set /a "len=0"
  211.    )
  212. )
  213. (
  214.    endlocal
  215.    set /a "%~1=%len%"
  216.    exit /b
  217. )
  220. :TimeStamp
  221. SET /A %~1=1%time:~-5,-3%%time:~-2%
  222. EXIT /B
  224. :MeasureTime
  225. SET /A %~1=!%~3!-!%~2!
  226. IF !%~1! LSS 0 SET /A %~1=6000+!%~1!
  227. IF "!%~1:~-2,-1!" == "" SET %~1=0!%~1!
  228. IF "!%~1:~0,-2!" == "" SET %~1=0!%~1!
  229. SET %~1=!%~1:~0,-2!.!%~1:~-2!sec
  230. EXIT /B
  233. :EndOfBatch
  234. ENDLOCAL
  235. GOTO :EOF
  238. :LabelBrackets
  239. (
  240.    ECHO I'm called "%~0" .
  241.    EXIT /B
  242.    :LabelInsideLabelBrackets
  243.    ECHO I'm called "%~0" .
  244.    EXIT /B
  245. )
  247. :LabelBracketsWOExit
  248. (
  249.    ECHO I'm called "%~0" .
  250.    :LabelInsideLabelBracketsWOExit
  251.    ECHO I'm called "%~0" .
  252.    EXIT /B
  253. )
  256. :PingOneHundredTimes
  257. ping 1.2.3.4 -n 1 -w 50 >NUL
  258. ping 1.2.3.4 -n 1 -w 50 >NUL
  259. ping 1.2.3.4 -n 1 -w 50 >NUL
  260. ping 1.2.3.4 -n 1 -w 50 >NUL
  261. ping 1.2.3.4 -n 1 -w 50 >NUL
  262. ping 1.2.3.4 -n 1 -w 50 >NUL
  263. ping 1.2.3.4 -n 1 -w 50 >NUL
  264. ping 1.2.3.4 -n 1 -w 50 >NUL
  265. ping 1.2.3.4 -n 1 -w 50 >NUL
  266. ping 1.2.3.4 -n 1 -w 50 >NUL
  267. ping 1.2.3.4 -n 1 -w 50 >NUL
  268. ping 1.2.3.4 -n 1 -w 50 >NUL
  269. ping 1.2.3.4 -n 1 -w 50 >NUL
  270. ping 1.2.3.4 -n 1 -w 50 >NUL
  271. ping 1.2.3.4 -n 1 -w 50 >NUL
  272. ping 1.2.3.4 -n 1 -w 50 >NUL
  273. ping 1.2.3.4 -n 1 -w 50 >NUL
  274. ping 1.2.3.4 -n 1 -w 50 >NUL
  275. ping 1.2.3.4 -n 1 -w 50 >NUL
  276. ping 1.2.3.4 -n 1 -w 50 >NUL
  277. ping 1.2.3.4 -n 1 -w 50 >NUL
  278. ping 1.2.3.4 -n 1 -w 50 >NUL
  279. ping 1.2.3.4 -n 1 -w 50 >NUL
  280. ping 1.2.3.4 -n 1 -w 50 >NUL
  281. ping 1.2.3.4 -n 1 -w 50 >NUL
  282. ping 1.2.3.4 -n 1 -w 50 >NUL
  283. ping 1.2.3.4 -n 1 -w 50 >NUL
  284. ping 1.2.3.4 -n 1 -w 50 >NUL
  285. ping 1.2.3.4 -n 1 -w 50 >NUL
  286. ping 1.2.3.4 -n 1 -w 50 >NUL
  287. ping 1.2.3.4 -n 1 -w 50 >NUL
  288. ping 1.2.3.4 -n 1 -w 50 >NUL
  289. ping 1.2.3.4 -n 1 -w 50 >NUL
  290. ping 1.2.3.4 -n 1 -w 50 >NUL
  291. ping 1.2.3.4 -n 1 -w 50 >NUL
  292. ping 1.2.3.4 -n 1 -w 50 >NUL
  293. ping 1.2.3.4 -n 1 -w 50 >NUL
  294. ping 1.2.3.4 -n 1 -w 50 >NUL
  295. ping 1.2.3.4 -n 1 -w 50 >NUL
  296. ping 1.2.3.4 -n 1 -w 50 >NUL
  297. ping 1.2.3.4 -n 1 -w 50 >NUL
  298. ping 1.2.3.4 -n 1 -w 50 >NUL
  299. ping 1.2.3.4 -n 1 -w 50 >NUL
  300. ping 1.2.3.4 -n 1 -w 50 >NUL
  301. ping 1.2.3.4 -n 1 -w 50 >NUL
  302. ping 1.2.3.4 -n 1 -w 50 >NUL
  303. ping 1.2.3.4 -n 1 -w 50 >NUL
  304. ping 1.2.3.4 -n 1 -w 50 >NUL
  305. ping 1.2.3.4 -n 1 -w 50 >NUL
  306. ping 1.2.3.4 -n 1 -w 50 >NUL
  307. ping 1.2.3.4 -n 1 -w 50 >NUL
  308. ping 1.2.3.4 -n 1 -w 50 >NUL
  309. ping 1.2.3.4 -n 1 -w 50 >NUL
  310. ping 1.2.3.4 -n 1 -w 50 >NUL
  311. ping 1.2.3.4 -n 1 -w 50 >NUL
  312. ping 1.2.3.4 -n 1 -w 50 >NUL
  313. ping 1.2.3.4 -n 1 -w 50 >NUL
  314. ping 1.2.3.4 -n 1 -w 50 >NUL
  315. ping 1.2.3.4 -n 1 -w 50 >NUL
  316. ping 1.2.3.4 -n 1 -w 50 >NUL
  317. ping 1.2.3.4 -n 1 -w 50 >NUL
  318. ping 1.2.3.4 -n 1 -w 50 >NUL
  319. ping 1.2.3.4 -n 1 -w 50 >NUL
  320. ping 1.2.3.4 -n 1 -w 50 >NUL
  321. ping 1.2.3.4 -n 1 -w 50 >NUL
  322. ping 1.2.3.4 -n 1 -w 50 >NUL
  323. ping 1.2.3.4 -n 1 -w 50 >NUL
  324. ping 1.2.3.4 -n 1 -w 50 >NUL
  325. ping 1.2.3.4 -n 1 -w 50 >NUL
  326. ping 1.2.3.4 -n 1 -w 50 >NUL
  327. ping 1.2.3.4 -n 1 -w 50 >NUL
  328. ping 1.2.3.4 -n 1 -w 50 >NUL
  329. ping 1.2.3.4 -n 1 -w 50 >NUL
  330. ping 1.2.3.4 -n 1 -w 50 >NUL
  331. ping 1.2.3.4 -n 1 -w 50 >NUL
  332. ping 1.2.3.4 -n 1 -w 50 >NUL
  333. ping 1.2.3.4 -n 1 -w 50 >NUL
  334. ping 1.2.3.4 -n 1 -w 50 >NUL
  335. ping 1.2.3.4 -n 1 -w 50 >NUL
  336. ping 1.2.3.4 -n 1 -w 50 >NUL
  337. ping 1.2.3.4 -n 1 -w 50 >NUL
  338. ping 1.2.3.4 -n 1 -w 50 >NUL
  339. ping 1.2.3.4 -n 1 -w 50 >NUL
  340. ping 1.2.3.4 -n 1 -w 50 >NUL
  341. ping 1.2.3.4 -n 1 -w 50 >NUL
  342. ping 1.2.3.4 -n 1 -w 50 >NUL
  343. ping 1.2.3.4 -n 1 -w 50 >NUL
  344. ping 1.2.3.4 -n 1 -w 50 >NUL
  345. ping 1.2.3.4 -n 1 -w 50 >NUL
  346. ping 1.2.3.4 -n 1 -w 50 >NUL
  347. ping 1.2.3.4 -n 1 -w 50 >NUL
  348. ping 1.2.3.4 -n 1 -w 50 >NUL
  349. ping 1.2.3.4 -n 1 -w 50 >NUL
  350. ping 1.2.3.4 -n 1 -w 50 >NUL
  351. ping 1.2.3.4 -n 1 -w 50 >NUL
  352. ping 1.2.3.4 -n 1 -w 50 >NUL
  353. ping 1.2.3.4 -n 1 -w 50 >NUL
  354. ping 1.2.3.4 -n 1 -w 50 >NUL
  355. ping 1.2.3.4 -n 1 -w 50 >NUL
  356. ping 1.2.3.4 -n 1 -w 50 >NUL
  357. ping 1.2.3.4 -n 1 -w 50 >NUL
  358. EXIT /B
  360. :PingOneHundredTimesBrackets
  361. (
  362.    ping 1.2.3.4 -n 1 -w 50 >NUL
  363.    ping 1.2.3.4 -n 1 -w 50 >NUL
  364.    ping 1.2.3.4 -n 1 -w 50 >NUL
  365.    ping 1.2.3.4 -n 1 -w 50 >NUL
  366.    ping 1.2.3.4 -n 1 -w 50 >NUL
  367.    ping 1.2.3.4 -n 1 -w 50 >NUL
  368.    ping 1.2.3.4 -n 1 -w 50 >NUL
  369.    ping 1.2.3.4 -n 1 -w 50 >NUL
  370.    ping 1.2.3.4 -n 1 -w 50 >NUL
  371.    ping 1.2.3.4 -n 1 -w 50 >NUL
  372.    ping 1.2.3.4 -n 1 -w 50 >NUL
  373.    ping 1.2.3.4 -n 1 -w 50 >NUL
  374.    ping 1.2.3.4 -n 1 -w 50 >NUL
  375.    ping 1.2.3.4 -n 1 -w 50 >NUL
  376.    ping 1.2.3.4 -n 1 -w 50 >NUL
  377.    ping 1.2.3.4 -n 1 -w 50 >NUL
  378.    ping 1.2.3.4 -n 1 -w 50 >NUL
  379.    ping 1.2.3.4 -n 1 -w 50 >NUL
  380.    ping 1.2.3.4 -n 1 -w 50 >NUL
  381.    ping 1.2.3.4 -n 1 -w 50 >NUL
  382.    ping 1.2.3.4 -n 1 -w 50 >NUL
  383.    ping 1.2.3.4 -n 1 -w 50 >NUL
  384.    ping 1.2.3.4 -n 1 -w 50 >NUL
  385.    ping 1.2.3.4 -n 1 -w 50 >NUL
  386.    ping 1.2.3.4 -n 1 -w 50 >NUL
  387.    ping 1.2.3.4 -n 1 -w 50 >NUL
  388.    ping 1.2.3.4 -n 1 -w 50 >NUL
  389.    ping 1.2.3.4 -n 1 -w 50 >NUL
  390.    ping 1.2.3.4 -n 1 -w 50 >NUL
  391.    ping 1.2.3.4 -n 1 -w 50 >NUL
  392.    ping 1.2.3.4 -n 1 -w 50 >NUL
  393.    ping 1.2.3.4 -n 1 -w 50 >NUL
  394.    ping 1.2.3.4 -n 1 -w 50 >NUL
  395.    ping 1.2.3.4 -n 1 -w 50 >NUL
  396.    ping 1.2.3.4 -n 1 -w 50 >NUL
  397.    ping 1.2.3.4 -n 1 -w 50 >NUL
  398.    ping 1.2.3.4 -n 1 -w 50 >NUL
  399.    ping 1.2.3.4 -n 1 -w 50 >NUL
  400.    ping 1.2.3.4 -n 1 -w 50 >NUL
  401.    ping 1.2.3.4 -n 1 -w 50 >NUL
  402.    ping 1.2.3.4 -n 1 -w 50 >NUL
  403.    ping 1.2.3.4 -n 1 -w 50 >NUL
  404.    ping 1.2.3.4 -n 1 -w 50 >NUL
  405.    ping 1.2.3.4 -n 1 -w 50 >NUL
  406.    ping 1.2.3.4 -n 1 -w 50 >NUL
  407.    ping 1.2.3.4 -n 1 -w 50 >NUL
  408.    ping 1.2.3.4 -n 1 -w 50 >NUL
  409.    ping 1.2.3.4 -n 1 -w 50 >NUL
  410.    ping 1.2.3.4 -n 1 -w 50 >NUL
  411.    ping 1.2.3.4 -n 1 -w 50 >NUL
  412.    ping 1.2.3.4 -n 1 -w 50 >NUL
  413.    ping 1.2.3.4 -n 1 -w 50 >NUL
  414.    ping 1.2.3.4 -n 1 -w 50 >NUL
  415.    ping 1.2.3.4 -n 1 -w 50 >NUL
  416.    ping 1.2.3.4 -n 1 -w 50 >NUL
  417.    ping 1.2.3.4 -n 1 -w 50 >NUL
  418.    ping 1.2.3.4 -n 1 -w 50 >NUL
  419.    ping 1.2.3.4 -n 1 -w 50 >NUL
  420.    ping 1.2.3.4 -n 1 -w 50 >NUL
  421.    ping 1.2.3.4 -n 1 -w 50 >NUL
  422.    ping 1.2.3.4 -n 1 -w 50 >NUL
  423.    ping 1.2.3.4 -n 1 -w 50 >NUL
  424.    ping 1.2.3.4 -n 1 -w 50 >NUL
  425.    ping 1.2.3.4 -n 1 -w 50 >NUL
  426.    ping 1.2.3.4 -n 1 -w 50 >NUL
  427.    ping 1.2.3.4 -n 1 -w 50 >NUL
  428.    ping 1.2.3.4 -n 1 -w 50 >NUL
  429.    ping 1.2.3.4 -n 1 -w 50 >NUL
  430.    ping 1.2.3.4 -n 1 -w 50 >NUL
  431.    ping 1.2.3.4 -n 1 -w 50 >NUL
  432.    ping 1.2.3.4 -n 1 -w 50 >NUL
  433.    ping 1.2.3.4 -n 1 -w 50 >NUL
  434.    ping 1.2.3.4 -n 1 -w 50 >NUL
  435.    ping 1.2.3.4 -n 1 -w 50 >NUL
  436.    ping 1.2.3.4 -n 1 -w 50 >NUL
  437.    ping 1.2.3.4 -n 1 -w 50 >NUL
  438.    ping 1.2.3.4 -n 1 -w 50 >NUL
  439.    ping 1.2.3.4 -n 1 -w 50 >NUL
  440.    ping 1.2.3.4 -n 1 -w 50 >NUL
  441.    ping 1.2.3.4 -n 1 -w 50 >NUL
  442.    ping 1.2.3.4 -n 1 -w 50 >NUL
  443.    ping 1.2.3.4 -n 1 -w 50 >NUL
  444.    ping 1.2.3.4 -n 1 -w 50 >NUL
  445.    ping 1.2.3.4 -n 1 -w 50 >NUL
  446.    ping 1.2.3.4 -n 1 -w 50 >NUL
  447.    ping 1.2.3.4 -n 1 -w 50 >NUL
  448.    ping 1.2.3.4 -n 1 -w 50 >NUL
  449.    ping 1.2.3.4 -n 1 -w 50 >NUL
  450.    ping 1.2.3.4 -n 1 -w 50 >NUL
  451.    ping 1.2.3.4 -n 1 -w 50 >NUL
  452.    ping 1.2.3.4 -n 1 -w 50 >NUL
  453.    ping 1.2.3.4 -n 1 -w 50 >NUL
  454.    ping 1.2.3.4 -n 1 -w 50 >NUL
  455.    ping 1.2.3.4 -n 1 -w 50 >NUL
  456.    ping 1.2.3.4 -n 1 -w 50 >NUL
  457.    ping 1.2.3.4 -n 1 -w 50 >NUL
  458.    ping 1.2.3.4 -n 1 -w 50 >NUL
  459.    ping 1.2.3.4 -n 1 -w 50 >NUL
  460.    ping 1.2.3.4 -n 1 -w 50 >NUL
  461.    ping 1.2.3.4 -n 1 -w 50 >NUL
  462.    ping 1.2.3.4 -n 1 -w 50 >NUL
  463.    EXIT /B
  464. )
  467. :DoItAgain
  468. (
  469.     TITLE A - StrLenNoLocal
  470.     CALL :TimeStamp StrLenNoLocalStart
  471.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocal LenDummyStrLenNoLocalA string %%a
  472.     CALL :TimeStamp StrLenNoLocalEnd
  474.     TITLE A - StrLenNoLocalBrackets
  475.     CALL :TimeStamp StrLenNoLocalBracketsStart
  476.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocalBrackets LenDummyStrLenNoLocalBracketsA string %%a
  477.     CALL :TimeStamp StrLenNoLocalBracketsEnd
  479.     TITLE A - StrLenLocal
  480.     CALL :TimeStamp StrLenLocalStart
  481.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocal LenDummyStrLenLocalA string %%a
  482.     CALL :TimeStamp StrLenLocalEnd
  484.     TITLE A - StrLenLocalBrackets
  485.     CALL :TimeStamp StrLenLocalBracketsStart
  486.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocalBrackets LenDummyStrLenLocalBracketsA string %%a
  487.     CALL :TimeStamp StrLenLocalBracketsEnd
  489.     CALL :MeasureTime StrLenNoLocalTime StrLenNoLocalStart StrLenNoLocalEnd
  490.     CALL :MeasureTime StrLenNoLocalBracketsTime StrLenNoLocalBracketsStart StrLenNoLocalBracketsEnd
  491.     CALL :MeasureTime StrLenLocalTime StrLenLocalStart StrLenLocalEnd
  492.     CALL :MeasureTime StrLenLocalBracketsTime StrLenLocalBracketsStart StrLenLocalBracketsEnd
  494.     REM Messure Timeout 5sec
  495.     TITLE Timeout 5sec
  496.     CALL :TimeStamp TimeoutStart
  497.     timeout /NOBREAK /T 5 >NUL
  498.     CALL :TimeStamp TimeoutEnd
  499.     CALL :MeasureTime TimeoutTime TimeoutStart TimeoutEnd
  501.     REM Ping...
  502.     TITLE Ping 5000
  503.     CALL :TimeStamp PingStart
  504.     ping 1.2.3.4 -n 1 -w 5000 >NUL
  505.     CALL :TimeStamp PingEnd
  506.     CALL :MeasureTime PingTime PingStart PingEnd
  508.     REM Ping 50 * 100
  509.     TITLE PingOneHundredTimes
  510.     CALL :TimeStamp PingOneHundredTimesStart
  511.     CALL :PingOneHundredTimes
  512.     CALL :TimeStamp PingOneHundredTimesEnd
  514.     TITLE PingOneHundredTimesBrackets
  515.     CALL :TimeStamp PingOneHundredTimesBracketsStart
  516.     CALL :PingOneHundredTimesBrackets
  517.     CALL :TimeStamp PingOneHundredTimesBracketsEnd
  519.     CALL :MeasureTime PingOneHundredTimesTime PingOneHundredTimesStart PingOneHundredTimesEnd
  520.     CALL :MeasureTime PingOneHundredTimesBracketsTime PingOneHundredTimesBracketsStart PingOneHundredTimesBracketsEnd
  522.     REM Invert order
  524.     TITLE B - StrLenLocalBrackets
  525.     CALL :TimeStamp StrLenLocalBracketsStart
  526.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocalBrackets LenDummyStrLenLocalBracketsB string %%a
  527.     CALL :TimeStamp StrLenLocalBracketsEnd
  529.     TITLE B - StrLenLocal
  530.     CALL :TimeStamp StrLenLocalStart
  531.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenLocal LenDummyStrLenLocalB string %%a
  532.     CALL :TimeStamp StrLenLocalEnd
  534.     TITLE B - StrLenNoLocalBrackets
  535.     CALL :TimeStamp StrLenNoLocalBracketsStart
  536.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocalBrackets LenDummyStrLenNoLocalBracketsB string %%a
  537.     CALL :TimeStamp StrLenNoLocalBracketsEnd
  539.     TITLE B - StrLenNoLocal
  540.     CALL :TimeStamp StrLenNoLocalStart
  541.     FOR /L %%a IN (1,1,%Loops%) DO CALL :StrLenNoLocal LenDummyStrLenNoLocalB string %%a
  542.     CALL :TimeStamp StrLenNoLocalEnd
  544.     TITLE Results
  545.     ECHO.
  547.     REM "Empty" Timestamp Measure
  548.     CALL :TimeStamp TimestampStart
  549.     CALL :TimeStamp TimestampEnd
  550.     CALL :MeasureTime TimestampTime TimestampStart TimestampEnd
  552.     ECHO Time StrLenNoLocal          A :  !StrLenNoLocalTime!
  553.     ECHO Time StrLenNoLocalBrackets  A :  !StrLenNoLocalBracketsTime!
  554.     ECHO Time StrLenLocal            A :  !StrLenLocalTime!
  555.     ECHO Time StrLenLocalBrackets    A :  !StrLenLocalBracketsTime!
  556.     ECHO StrLen !LenDummyStrLenNoLocalA! / !LenDummyStrLenNoLocalBracketsA! / !LenDummyStrLenLocalA! / !LenDummyStrLenLocalBracketsA!
  557.     ECHO.
  559.     CALL :MeasureTime StrLenNoLocalTime StrLenNoLocalStart StrLenNoLocalEnd
  560.     CALL :MeasureTime StrLenNoLocalBracketsTime StrLenNoLocalBracketsStart StrLenNoLocalBracketsEnd
  561.     CALL :MeasureTime StrLenLocalTime StrLenLocalStart StrLenLocalEnd
  562.     CALL :MeasureTime StrLenLocalBracketsTime StrLenLocalBracketsStart StrLenLocalBracketsEnd
  564.     ECHO Time StrLenNoLocal          B :  !StrLenNoLocalTime!
  565.     ECHO Time StrLenNoLocalBrackets  B :  !StrLenNoLocalBracketsTime!
  566.     ECHO Time StrLenLocal            B :  !StrLenLocalTime!
  567.     ECHO Time StrLenLocalBrackets    B :  !StrLenLocalBracketsTime!
  568.     ECHO StrLen !LenDummyStrLenNoLocalB! / !LenDummyStrLenNoLocalBracketsB! / !LenDummyStrLenLocalB! / !LenDummyStrLenLocalBracketsB!
  569.     ECHO.
  570.     ECHO "Empty" Timestamp Measure   :  !TimestampTime!
  571.     ECHO Timeout /T 5                :  !TimeoutTime!
  572.     ECHO ping 1.2.3.4 -n 1 -w 5000   :  !PingTime!
  573.     ECHO PingOneHundredTimes         :  !PingOneHundredTimesTime!
  574.     ECHO PingOneHundredTimesBrackets :  !PingOneHundredTimesBracketsTime!
  575.     ECHO.
  576.     EXIT /B
  577. )

输出量：

  1. Time StrLenNoLocal          A :  20.40sec
  2. Time StrLenNoLocalBrackets  A :  16.82sec
  3. Time StrLenLocal            A :  19.84sec
  4. Time StrLenLocalBrackets    A :  19.17sec
  5. StrLen 8191 / 8191 / 8191 / 8191
  7. Time StrLenNoLocal          B :  17.40sec
  8. Time StrLenNoLocalBrackets  B :  14.93sec
  9. Time StrLenLocal            B :  17.64sec
  10. Time StrLenLocalBrackets    B :  18.52sec
  11. StrLen 8191 / 8191 / 8191 / 8191
  13. "Empty" Timestamp Measure   :  0.00sec
  14. Timeout /T 5                :  5.16sec
  15. ping 1.2.3.4 -n 1 -w 5000   :  4.59sec
  16. PingOneHundredTimes         :  50.50sec
  17. PingOneHundredTimesBrackets :  50.50sec
  19. ...
  21. Time StrLenNoLocal          A :  18.76sec
  22. Time StrLenNoLocalBrackets  A :  16.76sec
  23. Time StrLenLocal            A :  19.09sec
  24. Time StrLenLocalBrackets    A :  19.67sec
  25. StrLen 8191 / 8191 / 8191 / 8191
  27. Time StrLenNoLocal          B :  18.24sec
  28. Time StrLenNoLocalBrackets  B :  15.97sec
  29. Time StrLenLocal            B :  18.63sec
  30. Time StrLenLocalBrackets    B :  19.60sec
  31. StrLen 8191 / 8191 / 8191 / 8191
  33. "Empty" Timestamp Measure   :  0.00sec
  34. Timeout /T 5                :  4.52sec
  35. ping 1.2.3.4 -n 1 -w 5000   :  4.56sec
  36. PingOneHundredTimes         :  50.49sec
  37. PingOneHundredTimesBrackets :  50.49sec
  39. I'm called ":LabelBrackets" .
  40. I'm called ":LabelInsideLabelBrackets" .
  42. I'm called ":LabelBracketsWOExit" .
  43. I'm called ":LabelBracketsWOExit" .
  44. I'm called ":LabelInsideLabelBracketsWOExit" .

我得出以下结论：

  1. ECHO %time%
  2. timeout /T 5
  3. ECHO %time%
  • 不是5秒。;）
  • 我每次都在“StrLenNoLocalBrackets”中得到最低点。
  • 我还没有发现一个命令链，括号内的任何东西都会导致问题。*
  1. :LongLabel
  2. (
  3.    ECHO I'm called "%~0" , because I have two extra lines.
  4.    EXIT /B
  5. )

*LongLabel仍然是 * 赢家（只要你知道你在做什么）。;）

  • 只是最后的修订**（我想我已经走得太远了）：

我还是发现了一个美中不足：

  1. @ECHO OFF
  3. SET "S="
  4. CALL :A
  6. SET "S="
  7. CALL :B
  9. SET "S="
  10. CALL :C
  12. SET "S="
  13. CALL :D
  15. SET "S="
  16. CALL :E
  18. SET "S="
  19. CALL :F
  21. GOTO :EOF
  23. :A
  24. (
  25.    SETLOCAL
  26.    SET S=LOCALC
  27.    ENDLOCAL
  28.    ECHO %~0: %S% --^> Empty
  29.    EXIT /B
  30. )
  32. :B
  33. SETLOCAL
  34. SET S=LOCALC
  35. (
  36.    ENDLOCAL
  37.    ECHO %~0: %S% ^<-- Set
  38.    EXIT /B
  39. )
  41. :C
  42. (
  43.    SETLOCAL
  44.    SET S=LOCALC
  45.    (
  46.       ENDLOCAL
  47.       ECHO %~0: %S% --^> Empty
  48.       EXIT /B
  49.    )
  50. )
  52. :D
  53. (
  54.    SETLOCAL
  55.    SET S=LOCALC
  56. )
  57. (
  58.    ENDLOCAL
  59.    ECHO %~0: %S% ^<-- Set
  60.    EXIT /B
  61. )
  63. :E
  64. (
  65.    SETLOCAL
  66.    SET S=LOCALC
  67.    ENDLOCAL & ECHO %~0: %S% --^> Empty & EXIT /B
  68. )
  70. :F
  71. SETLOCAL
  72. SET S=LOCALC
  73. ENDLOCAL & ECHO %~0: %S% ^<-- Set & EXIT /B
  75. ECHO End of batch (should not be echoed)

注意D、E和F之间的区别

  1. :A:  --> Empty
  2. :B: LOCALC <-- Set
  3. :C:  --> Empty
  4. :D: LOCALC <-- Set
  5. :E:  --> Empty
  6. :F: LOCALC <-- Set

这意味着你不能把所有的东西都放在一起，期待同样的结果。

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