hanyeguxing

@echo off
set a=Success.txt
set b=source.txt
for /f "usebackq delims=" %%a in ("%a%") do set "n=%%a"
for /f "delims=:" %%a in ('findstr /ni /c:"%n%" "%b%"') do set n=%%a
more +%n% "%b%">temp
move temp "%b%"
复制代码

代码未测试：从%a%文件获取最后一行内容并以此内容查询%b%文件中的行号，再以此行号跳过然后覆盖输出
ps：源文件中的最后一行a0010怎么到最后还没了？

hanyeguxing

@echo off
set a=Success.txt
set b=source.txt
for /f "usebackq delims=" %%a in ("%a%") do set "n=%%a"
if defined n for /f "delims=:" %%a in ('findstr /ni /c:"%n%" "%b%"') do set m=%%a
if defined m (
	more +%m% "%b%">temp
	move temp "%b%"
)
复制代码