jains521

@echo off
::1--100的和
set /a "totle=(1+100)*100/2"
set /p=1+...+100的结果是%totle%<nul
pause>nul
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@echo off
::1+...+n的和
set /p n=计算1+...+n, n=
set /a "totle=(1+n)*n/2"
set /p=1+...+%n%的结果是%totle%<nul
pause>nul
复制代码