這裡是和天成翻譯有關的地盤,歡迎到訪我的BLOG!

      if not defined ok echo/%%a

@echo off

JT_man注：或

pause>nul 

      if "!i!"=="%lines%" set ok=1

------------------------123_2.bat------------------------------- 

setlocal enabledelayedexpansion

@echo off

pause>nul 

setlocal enabledelayedexpansion

set "lines=2"

for /f "delims=" %%a in ('more ^< numbers.txt') do (

setlocal ENABLEEXTENSIONS 
set "first=" 
for /f "delims=" %%a in ('more ^< numbers.txt') do ( 
if not defined first set first=%%a 
) 
echo/%first% 
pause>nul 
------------------------1.bat-------------------------------------------

>>Displaying the first X lines翻譯社This example prints one翻譯社 two and three. 
顯示前幾行,列印第一,二翻譯社三行的例子以下： 
------------------------123.bat------------------------------- 
@echo off & setlocal ENABLEEXTENSIONS 
set "lines=3" 
set i=-1 
set "ok=" 
for /f "delims=" %%a in ('more ^< numbers.txt') do ( 
      set/a i+=1 & for /f %%z in ('echo/%%i%%') do ( 
      if "%%z"=="%lines%" set ok=1 
      ) 
if not defined ok echo/%%a 
) 
pause>nul 
------------------------123.bat-------------------------------

>>This page shows how to read specific lines from a text file. There are many ways to have the for /f command read the input file翻譯社 for instance: 
這篇文章演示若何從檔中讀取特定的行.用for /f敕令的多種轉變體式格局可以到達該目標,例如： 
---------------------------------for /f----------------------------------------- 
for /f "delims=" %%a in (input.txt) do ... 
for /f "delims=" %%a in ('type input.txt') do ... 
for /f "delims=" %%a in ('more ^< input.txt') do ... 
---------------------------------for /f----------------------------------------- 

>>However翻譯社 only the last method (using the more command) will give consistent results across Windows NT翻譯社 2000翻譯社 XP and 2003. The first method does not recognise unicode files. Also翻譯社 the usebackq switch must be used if the input filename contains spaces. The second method翻譯社 using the type command, also fails to recognise unicode files on Windows 2000, XP and 2003 if the input file does not begin with a bit order mark (BOM). 
然而,只有最後一種方式(用到more敕令的)在windows nt翻譯社2000,xp和2003中可以或許獲得一致的後果翻譯第一種方式,不能有用的辨認unicode編碼檔,同時,假如檔案名含有空格時,usebackq開關必需打開。第二種方式,用到type號令,一樣在windows nt翻譯社2000,xp和2003中,不克不及有效辨認unicode編碼檔,同時,要求輸入的檔內容不克不及以位元序標誌(BOM)開首. 

>>In all the examples, assume the contents of of the file numbers.txt to be: 
在如下所有的例子中翻譯社假定numbers.txt檔輸入以下內容： 
----------------------numbers.txt-------------------------- 
one 
two 
three 
four 
five 
six 
seven 
eight 
nine 
ten 
----------------------numbers.txt-------------------------- 

JT_man注：以下代碼中的setlocal ENABLEEXTENSIONS都可以刪除，因為系統預設敕令處置懲罰器副檔名是啟動的。

>>Displaying the first line翻譯社This example prints one. 
顯示第一行,列印第一行的例子以下： 
------------------------1.bat------------------------------------------ 
@echo off & 

------------------------通用.bat-------------------------------------------------- 

      set /a i+=1

JT_man注：或

------------------------123_2.bat------------------------------- 

set/a i=-1,start-=1

set "ok="

)