Question

以下批处理文件使用传入参数来获取第一个路径。

代码：

echo A. we started at = %cd%
set current=%cd%
pushd ..
echo #1 pushed to = %cd%
set parent=%cd%
pushd ..
echo #2 pushed to = %cd%
set grandparent=%cd%
echo .
if %argC% NEQ 10 (
  echo the if statement starts at = %cd%
    pushd ..
    echo if statement: #3 pushed to = %cd%
    popd ..
    echo if statement: #4 popped to = %cd%
    popd ..
    echo if statement: #5 popped to = %cd%
)
echo .
echo B. after the if statement we start back at: %cd%
popd ..
echo #6 popped to = %cd%
popd ..
echo #7 popped to = %cd%

结果：

A. we started at = C:\test\test-layer-2\files
#1 pushed to = C:\test\test-layer-2
#2 pushed to = C:\test
.
the if statement starts at = C:\test
if statement: #3 pushed to = C:\test
if statement: #4 popped to = C:\test
if statement: #5 popped to = C:\test
.
B. after the if statement we start back at: C:\test\test-layer-2
#6 popped to = C:\test\test-layer-2\files
#7 popped to = C:\test\test-layer-2\files
Press any key to continue . . .

问题：为什么if语句没有正确反映％cd％？ *删除＃1或＃2会影响＃3，＃4，＃5中输出的路径。 *改变＃3，＃4，＃5的路径只能在B行正确输出结果。

Answer 1

当您在块内使用变量时（在（和）之间，您需要启用延迟扩展：

setlocal enabledelayedexpansion
set var=hello
if "a"=="a" (
  set var=world
  echo %var% !var!
)

与您的%cd%

相同

Answer 2

您需要在批处理文件的顶部使用SetLocal EnableDelayedExpansion。请记住，将变量更改为代码块，例如一个if句，for等

然后您需要使用!个字符代替%：

...
echo if statement: #5 popped to = !cd!
...

如何在目录中执行pushd和popd

2 个答案: