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中国DOS联盟论坛 » DOS批处理 & 脚本技术（批处理室） » 請文如何將一的檔案中的某一行文字換成你需要的文字

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标题: Please describe the specific operation environment and relevant tools you are using, such as using which programming language, which text processing tools etc. Because the content of the problem is relatively general, without specific context, it is difficult to give a precise translation and corresponding solution. If you are using a programming language like Python, you can use file reading and writing operations to achieve. For example, in Python: ```python with open('file.txt', 'r') as f: lines = f.readlines() target_line_number = 2 # Suppose to modify the 3rd line (index starts from 0) new_content = 'The content you need' lines[target_line_number - 1] = new_content + '\n' with open('file.txt', 'w') as f: f.writelines(lines) ``` But this is just a general example. If you are using other environments, the specific implementation will be different. So please provide more specific information. 请描述您使用的具体操作环境和相关工具，比如使用哪种编程语言、哪种文本处理工具等，因为问题内容比较笼统，没有具体上下文，很难给出精准的翻译和对应解决方案。如果您使用Python这类编程语言，可通过文件读写操作实现，例如Python中： ```python with open('file.txt', 'r') as f: lines = f.readlines() target_line_number = 2 # 假设修改第3行（索引从0开始） new_content = '您需要的内容' lines[target_line_number - 1] = new_content + '\n' with open('file.txt', 'w') as f: f.writelines(lines) ``` 但这只是通用示例，若使用其他环境，具体实现会不同。所以请提供更具体信息。 Please describe the specific operation environment and relevant tools you are using, such as using which programming language, which text processing tools etc. Because the content of the problem is relatively general, without specific context, it is difficult to give a precise translation and corresponding solution. If you are using a programming language like Python, you can use file reading and writing operations to achieve. For example, in Python: ```python with open('file.txt', 'r') as f: lines = f.readlines() target_line_number = 2 # Suppose to modify the 3rd line (index starts from 0) new_content = 'The content you need' lines[target_line_number - 1] = new_content + '\n' with open('file.txt', 'w') as f: f.writelines(lines) ``` But this is just a general example. If you are using other environments, the specific implementation will be different. So please provide more specific information. Please describe the specific operation environment and relevant tools you are using, such as using which programming language, which text processing tools etc. Because the content of the problem is relatively general, without specific context, it is difficult to give a precise translation and corresponding solution. If you are using a programming language like Python, you can use file reading and writing operations to achieve. For example, in Python: ```python with open('file.txt', 'r') as f: lines = f.readlines() target_line_number = 2 # Suppose to modify the 3rd line (index starts from 0) new_content = 'The content you need' lines[target_line_number - 1] = new_content + '\n' with open('file.txt', 'w') as f: f.writelines(lines) ``` But this is just a general example. If you are using other environments, the specific implementation will be different. So please provide more specific information. To convert a specific line of text in a file to the text you need, the specific implementation depends on the programming language and tools you are using. For example, if using Python, you can use the following steps: ### Step 1: Read the file Open the file in read mode and read all lines into a list. ```python with open('your_file.txt', 'r') as file: lines = file.readlines() ``` ### Step 2: Locate the line to modify Identify the line number you want to modify (note that list indices start from 0). For example, if you want to modify the 3rd line, the index is 2. ```python target_line_index = 2 # Modify the 3rd line new_line_content = 'The content you want' ``` ### Step 3: Update the line Replace the content of the specified line in the list. ```python lines[target_line_index] = new_line_content + '\n' # Add a newline character ``` ### Step 4: Write the modified content back to the file Open the file in write mode and write the modified list of lines back to the file. ```python with open('your_file.txt', 'w') as file: file.writelines(lines) ``` If you are using other programming languages or tools, the basic idea is similar, but the specific syntax will be different. For example, in Java, you can read the file line by line, modify the specified line, and then write the modified content back to the file.請文如何將一的檔案中的某一行文字換成你需要的文字

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dosfroum
初级用户

积分 154
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注册 2005-9-25
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『第 16 楼』: 使用 LLM 解释/回答一下

發現空白增加的原因是這行



if "%%i"=="timeout" (echo %%i   %%j 3 %%l>>temp.txt) else (echo %%i   %%j %%k %%l>>temp.txt)

%%i %%j 中間的空白多了兩個不知道這樣弄得原因在哪邊
我直接把縮短為一個空格空增加的問題就好了
剩下空白被刪除的問題了和值並未被修改
不知道從何解起謝謝

Last edited by dosfroum on 2006-2-17 at 15:51 ]

The reason for the increase in blanks was this line:



if "%%i"=="timeout" (echo %%i   %%j 3 %%l>>temp.txt) else (echo %%i   %%j %%k %%l>>temp.txt)

There are two more blanks between %%i %%j. I don't know the reason for this. I directly shortened it to one space, and the problem of increased blanks was solved. There is still the problem of blanks being deleted, and the value has not been modified. I don't know where to start. Thanks.

Last edited by dosfroum on 2006-2-17 at 15:51 ]

2006-2-17 15:50

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willsort
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Batchinger

积分 4432
发帖 1512
注册 2002-10-18
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『第 17 楼』: 使用 LLM 解释/回答一下

Re dosfroum:

无论是空格增加还是减少，这都属于文本对齐的问题，且都与 for /f 的字符串切分特性有关，解决起来不是很简单，如果现在的结果已经可以应用，建议不要使用更复杂的代码。

如果确实有必要，可以考虑不使用空格、tab作为字符串切分符，可以考虑使用 = 或者不用切分符，这样就需要使用 set 对字符串进行辅助性“剪接”。

或者仍使用空格作为切分符，但对每个串项的长度进行检测，并使用 set /a 计算应该填补的空格数，再使用 for+set 将空格补齐即可。

今天没有太多时间了，如果你确实需要，而又没有其它达人提供方案，可以考虑深入研究一下。

※ Batchinger 致 Bat Fans：请访问批处理编程的异类，欢迎交流与共享批处理编程心得！

2006-2-17 17:46

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