批处理for /f命令中echo输出为何重复多次？

轻舞飞扬

1. @echo off
   
2. setlocal enabledelayedexpansion
   
3. for /f "delims=" %%i in (a.txt) do (for /f "delims= " %%k in (b.txt) do
   
4. 
   
5. (echo "%%i"|findstr "%%k"
   
6. set a=%%k
   
7. echo !a!>>c.txt))
   
8. pause

复制代码

如上，输出多次，不知道是什么原因，请指教

轻舞飞扬

好吧 犯2 了
知道了