批处理不用第三方和临时文件计算加减(就是纯P)

@echo off
echo;1-1 or 1+1
set /p a=
echo;%a%|findstr "+">nul 2>nul&&set jia=%a:+= %&&call :jia&&pause&&exit
echo;%a%|findstr "-">nul 2>nul&&set jian=%a:-= %
call :jian %a:-= %
pause
exit

:jia
cls
for %%i in (%jia%) do (
for /l %%j in (1,1,%%i) do set/a jg+=1
)
echo;%jg%
goto :eof

:jian
cls
set jg=%1
for /l %%j in (1,1,%2) do (
set /a jg-=1
)
echo;%jg%
goto :eof
复制代码