Question

我有一系列存储字符串的变量。这些变量的索引号通过FOR命令递增。

我想列出所有这些变量的所有值，索引号是从FOR定义生成的（可以是下次自动+1或类似的子功能）。

setlocal EnableDelayedExpansion
set dir01a=text 1
set dir02a=text 2
set dir03a=text 3
for %G in (01 02 03) do (echo !dir%Ga!)

它输出：

!dir01a!
!dir02a!
!dir03a!

我想要这个：

text 1
text 2
text 3

我找不到任何解决方案如何让echo将!dir%Ga!变量视为变量名而不是文本。

请问好吗？

如果批量使用，我想向％G添加1％以上。谢谢。

Answer 1

您的批处理脚本有效：

@ECHO OFF
SETLOCAL EnableExtensions EnableDelayedExpansion
set dir01a=text 1
set dir02a=text 2
set dir03a=text 3
for %%G in (01 02 03) do echo dir%%Ga =to= !dir%%Ga!

但是，SETLOCAL命令不会影响当前cmd实例，您需要创建新实例，请参阅下面的cmd /?和更新。

批处理脚本：命令对SETLOCAL EnableDelayedExpansion和ENDLOCAL;
命令行：分别对应的命令对CMD /V:ON /K和EXIT。

复制＆amp;将下一个代码段粘贴到打开的cmd窗口：

ECHO OFF
set dir01a=text 1
set dir02a=text 2
set dir03a=text 3
for %G in (01 02 03) do echo dir%Ga =to= !dir%Ga!
cmd /E:ON /V:ON /C for %G in (01 02 03) do @echo dir%Ga =to= !dir%Ga!
ECHO ON >NUL

<强>输出：

==> ECHO OFF
set dir01a=text 1
set dir02a=text 2
set dir03a=text 3
for %G in (01 02 03) do echo dir%Ga =to= !dir%Ga!
dir01a =to= !dir01a!
dir02a =to= !dir02a!
dir03a =to= !dir03a!
cmd /E:ON /V:ON /C for %G in (01 02 03) do @echo dir%Ga =to= !dir%Ga!
dir01a =to= text 1
dir02a =to= text 2
dir03a =to= text 3
ECHO ON >NUL

更新：copy＆amp;将下一个代码段粘贴到一个打开的cmd窗口（注意“prompt和===命令前缀以获得更好的输出可读性”：

prompt $Q$Q$G$S
echo OFF
=== set "var=OLD_value_d"
=== SETLOCAL EnableDelayedExpansion
=== set "var=NEW_value_d" & echo default expansion %var% !var! & set var
=== echo default expansion %var% !var!
=== ENDLOCAL
=== echo default expansion %var% !var!

=== CMD /V:ON /K
echo OFF
=== set "var=OLD_value_E"
=== set "var=NEW_value_E" & echo Delayed expansion %var% !var! & set var
=== echo Delayed expansion %var% !var!
=== EXIT

=== echo default expansion %var% !var!
=== echo ON >NUL
prompt

<强>输出：

==> prompt $Q$Q$G$S

==> echo OFF
=== set "var=OLD_value_d"
=== SETLOCAL EnableDelayedExpansion
=== set "var=NEW_value_d" & echo default expansion %var% !var! & set var
default expansion OLD_value_d !var!
var=NEW_value_d
=== echo default expansion %var% !var!
default expansion NEW_value_d !var!
=== ENDLOCAL
=== echo default expansion %var% !var!
default expansion NEW_value_d !var!

=== CMD /V:ON /K
==> echo OFF
=== set "var=OLD_value_E"
=== set "var=NEW_value_E" & echo Delayed expansion %var% !var! & set var
Delayed expansion OLD_value_E NEW_value_E
var=NEW_value_E
=== echo Delayed expansion %var% !var!
Delayed expansion NEW_value_E NEW_value_E
=== EXIT

=== echo default expansion %var% !var!
default expansion NEW_value_d !var!
=== echo ON >NUL

==> prompt

Answer 2

就个人而言，我会使用

for /f "tokens=1*delims==" %%F in ('set dir 2^>nul') do echo %%G

如果没有设置开始2^>nul

的变量，dir会抑制生成的错误消息

CMD FOR循环中字符串和数字的变量名称？

2 个答案: