qq362220083

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

pusofalse

46楼的算法真高！~

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%
pauseCOPY

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

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%
pauseCOPY

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！

sjzong

看过了，也学习了……

wjjy

set /a 50*(100+1)COPY

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

johnson3333

::批处理计算1+2+3+4+...+100=?
::计算从1到100的数字之和
::要求：
::不能直接echo，必须用程序计算出结果；
@echo off
set var1=0
set /p var2=请输入最大数：
for /l %%a in (1 1 %var2%) do (set /a var1+=%%a) 
echo;%var1%
pause
@echo off
set var1=0
for /l %%a in (1 1 100) do (set /a var1+=%%a) 
echo;%var1%
pauseCOPY

wlsmen

不能是（1+100）X50吗？

keen

楼主出本题的目的是让新手们熟悉批处理的基本语法，让新手们对批处理有个基本的概念。
你的想法是正确的，就是应该思考怎么样用批处理实现。

lvyaojian

1.

@echo off
set /a sum=0
for /l %%i in (1,1,100) do (
set /a sum=sum+%%i
)
echo %sum%
pauseCOPY

2.

@echo off
set /p n=输入N：
set /a sum=0
for /l %%i in (1,1,%n%) do (
set /a sum=sum+%%i
)
echo %sum%
pauseCOPY

vsbat

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

wsjxwj

::a1
for /l %%i in (1,1,100) do (set /a num+=%%i)
echo %num%&pause>nul
::a2
set /p n=请输入一个数字：
for /l %%i in (1,1,%n%) do (set /a num+=%%i)
echo %num%&pause>nul