[文本处理] 批处理如何原样输出百分号(变量不扩展)

hothbo

请教一个很小白的问题

echo netsh i i show in>>temp.bat
echo ^@set /p idx=请输入“本地连接”的Idx编号：>>temp.bat
echo netsh interface ipv4 set dns name=^%idx^% static 192.168.1.230 >>temp.bat
echo netsh interface ipv4 add dns name=^%idx^% 192.168.1.223 index=2 >>temp.bat
echo ping 127.1 -n 3 >null>>temp.bat
复制代码

运行后的结果是：
netsh i i show in
@set /p idx=请输入“本地连接”的Idx编号：
netsh interface ipv4 set dns name= static 192.168.1.230
netsh interface ipv4 add dns name= 192.168.1.223 index=2
ping 127.1 -n 3

可是我需要的运行结果是：
netsh i i show in
@set /p idx=请输入“本地连接”的Idx编号：
netsh interface ipv4 set dns name=%idx% static 192.168.1.230
netsh interface ipv4 add dns name=%idx% 192.168.1.223 index=2
ping 127.1 -n 3

我单独把第三和第四句在dos下运行，运行结果是我需要的结果。可是为什么组合到一起却不是我想得到的结果？

ivor

☛☛☛☛

replace %idx% to %%idx%%

hothbo

回复 2# ivor


谢谢！！按照您说的运行结果达到预期效果了！

只是能否说明一下为什么要这样改么？

ivor

Escape Characters

Escape Characters
Character to be escaped	Escape Sequence	Remark
%	%%	May not always be required in doublequoted strings, just try
^	^^	May not always be required in doublequoted strings, but it won't hurt
&	^&
<	^<
>	^>
|	^|
'	^'	Required only in the FOR /F "subject" (i.e. between the parenthesis), unless backq is used
`	^`	Required only in the FOR /F "subject" (i.e. between the parenthesis), if backq is used
,	^,	Required only in the FOR /F "subject" (i.e. between the parenthesis), even in doublequoted strings
;	^;
=	^=
(	^(
)	^)
!	^^!	Required only when delayed variable expansion is active
"	""	Required only inside the search pattern of FIND
\	\\	Required only inside the regex pattern of FINDSTR
[	\[
]	\]
"	\"
.	\.
*	\*
?	\?
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hothbo

回复 4# ivor


    万分感谢！！！收藏之！