edmond

@echo off
set t=0
for /l %%a in (1 1 100) do (
set/a t+=%%a
)
echo %t%
pause
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qinshi52

@echo off&setlocal enabledelayedexpansion
for /l %%i in (1,1,100) do set /a s+=%%i
echo !s!
pause
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@echo off&setlocal enabledelayedexpansion
set /p n=请输入数字：
for /l %%i in (1,1,!n!) do set /a s+=%%i
echo !b!
pause
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photonjl

::从1加到100的
@echo off
set str=0
for /l %%i in (1,1,100) do (
    set /a str+=%%i
)
echo %str%
pause>nul
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photonjl

::任意数值的计算
@echo off
set str=0
set /p var=input number

for /l %%i in (1,1,%var%) do (
    set /a str+=%%i
)
echo %str%
pause>nul
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lys5300

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

@echo off
:abc
cls
set /a i = 1
set /p n=請輸入數字：
if {%n%}=={} goto abc
:acb
set /a i+=1,j+=i
if %i% neq %n% goto acb
echo %j%
pause

smallpigs

@echo off
:abc
cls
set /a i = 1
set /p n=請輸入數字：

@echo off
:abc
cls
set /a i = 1
set /p n=請輸入數字：
if {%n%}=={} goto abc
:acb
set /a i+=1,j+=i
if %i% neq %n% goto acb
echo %j%
pause
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if {%n%}=={} goto abc
:acb
set /a i+=1,j+=i
if %i% neq %n% goto acb
echo %j%
pause

lmhxly

{code}
@echo off
set a=0
set b=0
:a
echo +%a%=%b%
set /a a+=1
set /a b=%b%+%a%
if %a% gtr 100 (pause) else (goto a
exit
{/code}

zsllq

@echo off
set var=0
for /l %%a in (1,1,100) do (set /a var=var+%%a)
echo 1+2+3+4+...+100=%var%
pause>nul
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[ 本帖最后由 zsllq 于 2010-10-27 15:36 编辑 ]

weichenxiehou

@echo on&setlocal enabledelayedexpansion
set sum=0
for /l %%i in (1,1,100) do (set /a sum+=%%i)
echo 1+2+...+100=!sum!
pause
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akkk

sum+=%%i   为什么sum不用初始化结果也对呢？？？？？？？

ithinkican

:c
Set /a s+=1
set /a b+=%s%
if %b% equ 100 echo %b% || goto c
pause

wolonga123

@echo off
set /a sum=0
set /p n=请输入一个数字:
for /l %%i in (1,1,%n%) do ( set /a sum+=%%i )
echo %sum%
pause
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_ThirdMan

set /p a=请输入:
echo %a%|findstr "^[1-9][0-9]*$" >nul
for /l %%i in (1,1,%a%) do (set /a b+=%%i)
echo %b%
pause
虽然是借鉴了两位高手的答案
还是学会了,很开心..

broly

 
@set var=0
@for /l %%i in (1,1,100) do @call set /a var=%%var%%+%%i
@echo %var%
@pause
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