更新批处理文件中的命令行参数 [英] Updating a command line parameter in a batch file

问题描述

是否可以在批处理文件中更新或替换命令行参数(如％1)?

Is it possible to update or replace a command line parameter (like %1) inside of a batch file?

示例代码:

rem test.cmd
@echo off
echo Before %1
IF "%1" == "123" (
    set %%1 = "12345678"
)
echo After %1

所需结果:

C:/>Test 123
Before 123
After 12345678

实际结果:

C:/>Test 123
Before 123
After 123

推荐答案

否.您尝试的是不可能的.

No. What you are trying is not possible.

可以模拟将原始批处理参数传递给子例程，或使用修改后的参数递归调用同一cmd，这将再次获得％1，％2，...调用中提供的参数.但这不是你要的.

Can be simulated passing original batch parameters to subrutine, or call the same cmd recursively with modified parameters, which again get %1, %2, ... the parameters provided in the call. But this is not what you ask.

rem test.cmd
@echo off
echo Before %1

if "%~1"=="123" (
    call :test %1234
) else (
    call :test %1
)

goto :EOF

:test

echo After %1

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