ljfnh403

@echo off&setlocal EnableDelayedExpansion&set f=+-&set "制表符=        "&rem 请在这里放入制表符
set 退格=%制表符%-&mode con cols=80 lines=25
set/p max=输入最大数值：&set/a max+=1
for /l %%a in () do (set/a a1=!random!%%max,a2=!random!%%max,r=!random!%%2
for %%b in (!r!) do (set/p ans=→!a1!!f:~%%b,1!!a2!=
set/a ans=a1!f:~%%b,1!a2-ans+0
echo.%退格%
if !ans!==0 (echo.√) else echo.×))

ljfnh403

@echo off&setlocal EnableDelayedExpansion&set f=+-
set "制表符=        "&rem 请在这里放入制表符
set "退格符="&rem 请在这里放入12个退格符
set 退格=%制表符%%退格符%&mode con cols=80 lines=25
set/p max=输入最大数值：&set/a max+=1
for /l %%a in () do (set/a a1=!random!%%max,a2=!random!%%max,r=!random!%%2
for %%b in (!r!) do (set/p ans=→!a1!!f:~%%b,1!!a2!=
set/a ans=a1!f:~%%b,1!a2-ans+0
echo.%退格%
if !ans!==0 (echo.√) else echo.×))