h5599859

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