doxygen.txt

版

8.0.56336（版本和值之间没有空格）

test.bat的

@echo off
setlocal EnableDelayedExpansion
set num=0
if %errorlevel%==0 (
FOR /F "tokens=* delims=" %%a IN ('"wmic product where "Name like 'Microsoft Visual C++ 2005 Redistributable'" get version"') do (
echo %%%a >> doxygen.txt
)
rem FOR /F "tokens=* delims=" %%x in (doxygen.txt) DO echo %%x
for /f "tokens=* delims=" %%i in (doxygen.txt) do (
    set /a num+=1
    set v[!num!]=%%i
)
del doxygen.txt
set line1=%v[1]%
set line2=%v[2]%
set line3=%v[3]%
set line4=%v[4]%
echo line1: %line1%
echo line2: %line2%
echo line3: %line3%
echo line4: %line4%
endlocal
)
)

此处无法获取line1，line2等的值。

任何人都可以建议我在哪里犯了错误。

提前致谢。

Answer 1

在执行行或括号块之前，批量展开百分比表达式因此设置line1 =％v [1]％将简单地扩展为空，因为它在FOR循环开始之前展开。

但您可以使用延迟扩展语法，因为这些语法在运行时中展开。

@echo off
setlocal EnableDelayedExpansion
set num=0
if %errorlevel%==0 (
    FOR /F "tokens=* delims=" %%a IN ('"wmic product where "Name like 'Microsoft Visual C++ 2005 Redistributable'" get version"') do (
        echo %%a>> doxygen.txt
    )
    rem FOR /F "tokens=* delims=" %%x in (doxygen.txt) DO echo %%x
    for /f "tokens=* delims=" %%i in (doxygen.txt) do (
        set /a num+=1
        set "v[!num!]=%%i"
    )
    del doxygen.txt
    set "line1=!v[1]!"
    set "line2=!v[2]!"
    set "line3=!v[3]!"
    set "line4=!v[4]!"
    echo line1: !line1!
    echo line2: !line2!
    echo line3: !line3!
    echo line4: !line4!
)
endlocal

Answer 2

如果您只是想从输出中获取版本，这是一种更简单的方法：

<强> 1

@echo off
setlocal EnableDelayedExpansion
set num=0
if %errorlevel%==0 (
    FOR /F "skip=1 tokens=* delims=" %%v IN ('wmic product where "Name like 'Microsoft Visual C++ 2005 Redistributable'" get version ^| findstr "."') do (
        echo Version: %%v
        set mc_vcpp_05=%%v
    )
)
endlocal

2：

如果您因某些原因需要阅读该文件，请执行以下操作：

@echo off
if %errorlevel%==0 (
    FOR /F "skip=1 tokens=1 delims= " %%a IN ('wmic product where "Name like 'Microsoft Visual C++ 2005 Redistributable'" get version ^| findstr "."') do (
        echo %%a >> doxygen.txt
    )
    for /f "tokens=1* delims=" %%I in ('type doxygen.txt') do (
        echo Version: %%I
    )
    del doxygen.txt
)

为什么它在你的原始剧本中表现得很好，我还不知道。当我发现

时，我会编辑或评论我的答案

从批处理脚本读取文本文件时出现问题

doxygen.txt

test.bat的

2 个答案: