如何通过C语言编程在现有PDF文件中添加下标?
有些电子书的每一页上都有与版权相关的下标。我想知道有没有办法通过编程来完成这项工作?具体来说,用C语言编程。
他们不可能手动添加这个,所以我认为应该有一些聪明的方法,但我未能从谷歌获得任何有用的信息。
Some ebooks have copyright-related subscripts on each page. I want to know is there anyway to do this job by programming? Specifically speacking, in C programming language.
It is impossible for them to add this manually, so I think there should be some smart method, but I failed to get any userful information from google.
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PDF 是一组应用于 PostScript 语言。有一些库可以帮助您操作 PDF 文件。您可能需要了解很多有关文档格式的知识才能完成这项工作。
PDF is a set of structures applied to a subset of the PostScript language. There are a few libraries that should help you manipulate PDF files. You will probably need to know a lot about the formatting of your documents to make this work.