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[b]回复 [url=http://www.bathome.net/redirect.php?goto=findpost&pid=276865&ptid=68084]9#[/url] [i]qixiaobin0715[/i] [/b]


@echo off
for /f "delims=" %%i in (b.txt) do set "_%%i=true"
(for /f "tokens=1* delims=|" %%i in (a.txt) do (
    if defined _%%i (
        if "%%j"=="" (
            echo %%i
        ) else (
            echo %%i^|%%j
        )
    )
)) > c.txt