Windows Batch For 循环未按预期重复

Question

目标：
我有一个批处理程序，我希望 for 循环通过分隔符分割字符串，因此在每次迭代中都会分割并打印出子字符串。

问题：
然而，我发现 for 循环并没有按预期重复，而只是执行一次，尽管变量

my_str

确实正确地改变了它的值。

那么问题产生的原因是什么？

PS： 仅供参考，

my_str

变量中的子字符串数量未知，因此我没有在 for 循环中使用

token

选项。

我的批处理程序：

@echo off
setlocal enabledelayedexpansion

set "my_delim=`"
set "my_str=I am A`I am B`I am C`"

for /F "delims=%my_delim%" %%A in ("!my_str!") do (
    echo inside loop started
    echo A value is [%%A]
    
    set "my_str=!my_str:*%my_delim%=!"
    echo remaining my_str is [!my_str!]
    echo inside loop ended
    echo ------------------------------------
)
echo exited loop
pause

实际结果：

inside loop started
A value is [I am A]
remaining my_str is [I am B`I am C`]
inside loop ended
------------------------------------
exited loop
Press any key to continue . . . 

预期结果：

inside loop started
A value is [I am A]
remaining my_str is [I am B`I am C`]
inside loop ended
------------------------------------
inside loop started
A value is [I am B]
remaining my_str is [I am C`]
inside loop ended
------------------------------------
inside loop started
A value is [I am C]
remaining my_str is []
inside loop ended
------------------------------------
exited loop
Press any key to continue . . . 

Answer 1

set "my_str=I am A`I am B`I am C`"

:again    
for /F "delims=%my_delim%" %%A in ("!my_str!") do (
    echo inside loop started
    echo A value is [%%A]
    
    set "my_str=!my_str:*%my_delim%=!"
    echo remaining my_str is [!my_str!]
    echo inside loop ended
    echo ------------------------------------
)
if defined my_str goto again

应该可以解决你的问题（但你错过了

for

的要点）

{未经测试}