BHsolve

@echo off
color 0B
setlocal enabledelayedexpansion
set /a A="%random%%%5"*9
set /a B=("%random%%%3"+1)*3
echo A=%A% B=%B%
set fuhao=+-*/
set/a n=0
:calc
set/a RS=%A%!fuhao:~%n%,1!%B%
if not "!fuhao:~%n%,1!"=="" ( 
echo A !fuhao:~%n%,1! B = %RS% 
set /a n+=1 && goto calc
)
pause>nul
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