rogoo

::以下为1-n
set /p num=其输入数字
set he=0
for /l %%i in (1,1,%num%) do (
set /a he=he+%%i
)
echo 和为%he%
pause
::以下为1-100
set he=100
for /l %%i in (1,1,100) do (
set /a he=he+%%i
)
echo 和为%he%
pause