wangshuping42

@echo off
set sum=0
setlocal enabledelayedexpansion
for /l %%i in (1 1 100) do ( set /a sum=sum+%%i)
echo !sum!
pause>nul

wjjy

set /a 50*(100+1)
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sjzong

看过了，也学习了……

jwq

set /a sum=0
for /l %%n in (0,1,100) do (
set /a sum=sum+%%n)
echo %sum%
pause
不晓得这段过不过关哈！

cainiao736

@echo off&setlocal enabledelayedexpansion
set /p n=请输入n的值：
set sum=0
for /l %%i in (1,1,!n!) do set /a sum=!sum!+%%i
echo %sum%
pause
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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

stuqx

@echo off
set /a result=0
set /p n=输入N的值:
for /l %%a in (1,1,%n%) do set /a result+=%%a
echo result=%result%
pause
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pusofalse

46楼的算法真高！~

qq362220083

set /p maxnum=input a number:
set /a sum=(%maxnum%+1)*%maxnum%/2
echo.
echo.
echo.
echo.%sum%
pause>nul
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hyx

计算1到100

@echo off
setlocal enabledelayedexpansion
set a=0
for /l %%i in (1,1,100) do set /a a=a+%%i
echo 1到100的数字之和为%a%
pause>nul

计算1到n

@echo off
echo 计算1+2+3+...+n=?
setlocal enabledelayedexpansion
set /p a=请输入n为几:
set b=0
for /l %%i in (1,1,%a%) do set /a b=b+%%i
echo 1到%a%的数字之和为%b%
pause>nul

keen

@echo off
set /p n= 请输入最后一个数：
set /a sum=(1+%n%)*%n%/2
echo 总和：%sum%
pause
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myzwd

@echo off
setlocal enabledelayedexpansion
for /l %%i in (1 1 100) do (
set /a tt+=%%i,sum=tt-1)
echo !sum!

zhouyongjun

@echo off
set/p n=  input a number :
set/a s=n-1,s*=n/2,s+=n
echo %s%
pause
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[ 本帖最后由 zhouyongjun 于 2009-2-16 11:54 编辑 ]

irresolute

@echo off
:main
set aa=
setlocal enabledelayedexpansion
set /p n=请输入数字n:
for /l %%i in (1,1,%n%) do (
set /a aa=!aa!+%%i)
echo !aa!
pause>nul
goto :main
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irresolute

@echo off
:main
set aa=
setlocal enabledelayedexpansion
set /p n=请输入数字n:
for /l %%i in (1,1,%n%) do (
set /a aa=!aa!+%%i)
echo !aa!
pause>nul
goto :main
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算法真简单