unknown_world

@echo off & setlocal enabledelayedexpansion 
set pass=123
:loop
set /p "mima=请输入您的密码："

if "%mima%"=="" (cls & echo 密码不能为空！& goto loop )

if %mima%==%pass%  (echo 您已经登录成功) else (echo 您登录失败！)

paus
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