zqz0012005

@echo off
setlocal enableDelayedExpansion
set limit=100
set /p limit=指定范围：
:loop
set /a "x = %random% %% (limit+1)"
set /a "p = %random% %% (limit-x+1)"
set /a "q = %random% %% (x+1)"
set /a "bool = %random% %% 2"
if %bool%==1 (set y=+%p%) else (set y=-%q%)
set /a r=%x%%y%
echo %x%%y%=?
set /p ans=请输入答案：
if not "%ans%"=="%r%" (echo 错误，正确答案是%r%&pause>nul)
goto loop
pause
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