mxxcgzxxx

@echo off
:1
set /p n=请输入数字:
set /a n*=1
if %n% lss 1 goto:1
set /a n=(1+n)*n/2
echo %n%
pause>nul
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没事干再弄一个

@echo off
:1
set /p n1=请输入起始数字（大于等于0）:
set /a n1*=1
if %n1% lss 1 goto:1
:2
set /p n2=请输入未尾数字（大于%n1%）：
set /a n2*=1
if %n2% leq %n1% goto :2
:3
set /a n=n2-n1
set /p n3=请输入数列间跨（小等于%n%）:
set /a n3*=1
if %n3% lss 1 goto :3
if %n3% gtr %n% goto :3
set n=0
for /l %%1 in (%n1%,%n3%,%n2%) do set /a n=n+%%1
echo %n%
pause>nul
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