Question

使用批处理提取a.txt中指定字符串至b.txt

a.txt中包含：
Internet 10.100.11.111 3 000f.fe0c.40a2 ARPA Vlan111
Internet 10.100.11.107 5 0013.8f9f.79e0 ARPA Vlan111
Internet 10.100.11.117 7 000d.609e.2c2b ARPA Vlan111
......
我要提取出IP地址和mac地址至b.txt：
10.100.11.111 000f.fe0c.40a2
10.100.11.107 0013.8f9f.79e0
10.100.11.117 000d.609e.2c2b
......

Answer 1

@echo off
(For /f "tokens=1-4" %%i in (a.txt) do echo %%j %%l)>b.txt
start b.txt
pause

Answer 2

@ECHO OFF
IF EXIST b.txt DEL b.txt>NUL
FOR /F "TOKENS=1-4" %%A IN (a.txt) DO ECHO %%B %%D>>b.txt