sgaizxt001

@echo off
setlocal enabledelayedexpansion
set /p max=请输入范围上限:
cls
set /a ran=!random!%%2
if %ran% equ 0 (goto jiafa) else (goto jianfa)

:jiafa
set /a a=!random!%%%max%+1
set /a b=!random!%%%max%+1
set /a number=%a%+%b%
if %number% gtr %max% goto jiafa
echo %a%+%b%=?
set /p res=请输入答案:
echo.
if %res% equ %number% (echo 正确) else (echo 错误，正确答案是%number%)
pause
goto :eof
 

:jianfa
set /a a=!random!%%%max%+1
set /a b=!random!%%%max%+1
if %a% gtr %b% (call :jian %a% %b%) else (call :jian %b% %a%)
set /p res=请输入答案:
if %res% equ %num% (echo 正确) else (echo 错误，正确答案是%num%) 
pause
goto :eof
 

:jian
echo %1-%2=?
set /a num=%1-%2
echo.
goto :eof
复制代码

已经修改为随机加减法了，加法的运算的上限的判断问题，我没有更好的思路，batman可否给讲解一下？

[ 本帖最后由 sgaizxt001 于 2010-9-20 14:14 编辑 ]

sgaizxt001

@echo off
setlocal enabledelayedexpansion
set /p max=请输入范围上限:
cls
set /a ran=!random!%%2
if %ran% equ 0 (set str=-) else (set str=+)
:loop
set /a a=!random!%%%max%+1
set /a b=!random!%%%max%+1
set /a n=%a%+%b%
if %n% gtr %max% goto :loop
if %a% gtr %b% (call :lp %a% %b%) else (call :lp %b% %a%)
set /p res=请输入答案:
if %res% equ %num% (echo 正确) else (echo 错误，正确答案是: %num%)
echo.
pause 
goto :eof

:lp
echo %1%str%%2=?
set /a num=%1%str%%2
echo.
复制代码

略有改进，但是还是无法解决和上限的问题