lvsehuaxue

rem 此为第二个问题答案
@echo off
set /p a=请输入数值
for /l %%i in (1,1,%a%) do (
    set /a n+=%%i
)
echo %n%
pause
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lvsehuaxue

@echo off
set n=101
:loop
set /a n=n-1
set /a m+=n
if %n% neq 0 goto loop
echo %m%
pause
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