aloha20200628

给一个纯P版
预览结果版本》

@echo off &setlocal
for /f %%n in ('find /c /v "" ^<"d:\数据\a.txt" ') do set/a "n=%%n-500"
more +%n% "d:\数据\a.txt"
复制代码

保存结果版本》

@echo off &setlocal
for /f %%n in ('find /c /v "" ^<"d:\数据\a.txt" ') do set/a "n=%%n-500"
more +%n% "d:\数据\a.txt">"d:\数据\a.new.txt"
复制代码