pcl_test

原理就是字符叠加或递减
两个简单的例子

@echo off
for /l %%a in (1 1 20) do (
ping -n 1 0 >nul
set /p=▉<nul
)
pause
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@echo off & setlocal enabledelayedexpansion
for /l %%a in (1 1 20) do (
set s=!s!▉
echo !s!
ping -n 1 0 >nul
cls
)
pause
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再来个稍有难度的例子

@echo off &setlocal enabledelayedexpansion
for /l %%a in (1 1 55) do (
set a========================================================
set a=!a:~%%a!
set b=!b!^>
set /p=!b!!a!<nul
ping -n 1 0 >nul
cls
)
pause
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