奇妙森林

A1：

@echo off
set str=I love,bbs;bathome.net
set str=%str:.= %
for %%a in (%str%) do echo %%a
pauseCOPY

A2：

@echo off
set str=I love,bbs;bathome.net
set str=%str:.= %
for %%a in (%str%) do if %%a == net;echo %%a
pauseCOPY