从变量中获取字符串的最后一个字符
问题描述：
我遇到的问题在大多数语言中都很容易实现，但我似乎无法在批处理中找出问题。我想提取一个字符串的最后一个字符。在伪代码..从变量中获取字符串的最后一个字符
if var1.substring(var1.length, -1) = "0"
do something
英语......如果字符串中的最后一个字符是0，那么......
答
set var=%var:~-1%
看到SET /?从提示docco。
@ECHO OFF
SETLOCAL
SET var=abcd
SET var2=%var:~-1%
CALL :show "-1"
SET var2=%var:~-2%
CALL :show "-2"
SET var2=%var:~-3%
CALL :show "-3"
SET var2=%var:~1%
CALL :show "1"
SET var2=%var:~2%
CALL :show "2"
SET var2=%var:~3%
CALL :show "3"
SET var2=%var:~0,1%
CALL :show "0,1"
SET var2=%var:~0,2%
CALL :show "0,2"
SET var2=%var:~0,3%
CALL :show "0,3"
SET var2=%var:~0,-1%
CALL :show "0,-1"
SET var2=%var:~0,-2%
CALL :show "0,-2"
SET var2=%var:~0,-3%
CALL :show "0,-3"
SET var2=%var:~1,-1%
CALL :show "1,-1"
SET var2=%var:~1,-2%
CALL :show "1,-2"
SET var2=%var:~1,-3%
CALL :show "1,-3"
GOTO :eof
:show
echo Test with "var:~%~1" : var=%var% var2=%var2%
GOTO :eof
结果：
Test with "var:~-1" : var=abcd var2=d
Test with "var:~-2" : var=abcd var2=cd
Test with "var:~-3" : var=abcd var2=bcd
Test with "var:~1" : var=abcd var2=bcd
Test with "var:~2" : var=abcd var2=cd
Test with "var:~3" : var=abcd var2=d
Test with "var:~0,1" : var=abcd var2=a
Test with "var:~0,2" : var=abcd var2=ab
Test with "var:~0,3" : var=abcd var2=abc
Test with "var:~0,-1" : var=abcd var2=abc
Test with "var:~0,-2" : var=abcd var2=ab
Test with "var:~0,-3" : var=abcd var2=a
Test with "var:~1,-1" : var=abcd var2=bc
Test with "var:~1,-2" : var=abcd var2=b
Test with "var:~1,-3" : var=abcd var2=
为了您IF语句，尝试
IF "%var:~-1%"=="0" (dosomething) else (dosomethingelse)
答
批未用C风格的逻辑，那么你真的要考虑不同的大部分时间它。
也就是说，字符串 - 右似乎是你想要什么： http://www.dostips.com/DtTipsStringManipulation.php#Snippets.RightString
%str:~-1%
，将让你的最后一个字符。
寻求帮助，输入'help set'。 – Endoro 2013-03-27 15:24:58