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中国DOS联盟论坛 » DOS批处理 & 脚本技术（批处理室） » How to use the for command to extract the last line of text content as a variable View 2,927　Replies 10
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Original Poster Posted 2006-12-22 12:38　·　 中国 湖南 长沙 电信
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The content of text a is as follows
0
1
2
3
4
5
Purpose: Run the following batch processing, %i% is equal to the content of the last line of document a,
@echo off
set /a i=%i%+1
echo %i%
Floor 2 Posted 2006-12-22 12:42　·　 中国 广西 玉林 博白县 电信
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for %%i in (a.txt) do echo %%i
Floor 3 Posted 2006-12-22 12:51　·　 中国 广东 电信
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```
@echo off
for /f %%i in (a.txt) do set i=%%i
set /a i=%i%+1
echo %i%


[ Last edited by namejm on 2006-12-22 at 12:47 PM ]
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26933062 +1 2006-12-22 13:23
尺有所短，寸有所长，学好CMD没商量。
考虑问题复杂化，解决问题简洁化。
Floor 4 Posted 2006-12-22 13:30　·　 中国 湖南 长沙 电信
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Thanks to the user on floor 3, it seems that you need to add /f after for. Also, thanks to the brother on floor 2. Why didn't you all add /f? According to what you said, what's displayed is the file name a.txt instead of the last line of the document content. Did I not make my question clear?
Floor 5 Posted 2006-12-22 14:09　·　 中国 广西 玉林 博白县 电信
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Just wrote it casually, forgot to add "/f"
Floor 6 Posted 2006-12-23 01:48　·　 中国 广东 电信
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Hehe, I wrote it casually based on the 2F, but unexpectedly made a junior mistake.
尺有所短，寸有所长，学好CMD没商量。
考虑问题复杂化，解决问题简洁化。
Floor 7 Posted 2006-12-23 03:33　·　 中国 湖北 武汉 电信
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Originally posted by namejm at 2006-12-21 23:51:


@echo off

for /f %%i in (a.txt) do set i=%%i

set /a i=%i%+1

echo %i%


[ Last edited by namejm on 2006-12-22 at 12:47 PM ]


　　Don't understand why it's written like this. What's the purpose of adding 1?


@echo off

for /f "delims=" %%i in (a.txt) do set i=%%i

echo %i%

pause
Floor 8 Posted 2006-12-23 03:45　·　 中国 河北 廊坊 三河市 移动
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Adding 1 is the purpose that the LZ's batch processing needs to accomplish.
三人行，必有吾师焉。 学然后知不足，教然后知困，然后能自强也。
Floor 9 Posted 2006-12-23 03:47　·　 中国 湖北 武汉 电信
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　　Oh, I thought it was only extracting the last row. I read the question wrong.
Floor 10 Posted 2008-01-01 18:46　·　 中国 广东 广州 天河区 电信
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Ask the expert, if I want to extract the elements of the first line and the second line in front, how to do it with the program
Floor 11 Posted 2008-01-02 13:46　·　 中国 湖北 武汉 电信
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Originally posted by Li103Z at 2008-1-1 18:46:
Ask the experts, if I want to extract the elements of the first and second lines, how to do it with the program

Search for "ReadLine".
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