How do I understand this script - China DOS Union Forum - China DOS Union

@echo off
set a=^set /p=■%b%^<nul^&ping/n 0 127.1^>nul^&

echo ┌——————————————————————————————————————┐
set/p= <nul&%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%
echo 100%%
echo └——————————————————————————————————————┘

set a=^set /p=■%b%^<nul this is assigning set /p=■ to a, what is the role of the %b% variable here, and why is nul used here to input empty

ping/n 0 127.1^>nul^& does this act as a delay, and what does the final ^& do here, and why can't it loop output without adding this ■

set/p= <nul&%a% if nul is not added here, the output result will be set /p■■■■■■■■.

Floor1　chen8919043	Posted 2010-06-18 16:59
初级用户　Posts 21　Credits 20
@echo off set a=^set /p=■%b%^<nul^&ping/n 0 127.1^>nul^& echo ┌——————————————————————————————————————┐ set/p= <nul&%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a%%a% echo 100%% echo └——————————————————————————————————————┘ set a=^set /p=■%b%^<nul this is assigning set /p=■ to a, what is the role of the %b% variable here, and why is nul used here to input empty ping/n 0 127.1^>nul^& does this act as a delay, and what does the final ^& do here, and why can't it loop output without adding this ■ set/p= <nul&%a% if nul is not added here, the output result will be set /p■■■■■■■■.