阿木博主一句话概括：Snobol4【1】 语言在PDF【2】页面合并【3】中的应用实现
阿木博主为你简单介绍：
Snobol4 是一种古老的编程语言【4】，以其简洁和强大的文本处理【5】能力而闻名。本文将探讨如何使用 Snobol4 语言编写一个简单的程序，用于合并多个 PDF 页面为一个单一的文档。我们将从 Snobol4 的基本语法开始，逐步深入到PDF处理的具体实现，并最终展示一个完整的合并PDF页面的程序。
关键词：Snobol4，PDF页面合并，文本处理，编程语言
一、
PDF（Portable Document Format）是一种广泛使用的文档格式，它能够保持文档的原始格式和布局，不受操作系统和应用程序的影响。在实际应用中，我们经常需要将多个PDF页面合并为一个单一的文档，以便于阅读和分发。本文将介绍如何使用 Snobol4 语言实现这一功能。
二、Snobol4 语言简介
Snobol4 是一种高级编程语言，最初由David J. Farber等人于1962年设计。它以其强大的文本处理能力而著称，特别适合于文本编辑、文本分析和数据转换【6】等任务。Snobol4 的语法简洁，易于理解，但同时也具有一定的挑战性。
三、PDF页面合并的原理
PDF页面合并的基本原理是将多个PDF文件中的页面内容依次写入一个新的PDF文件中。这通常涉及到以下步骤：
1. 打开源PDF文件【7】。
2. 读取页面内容。
3. 将页面内容写入目标PDF文件【8】。
4. 重复步骤1-3，直到所有页面都被合并。
5. 关闭目标PDF文件。
四、Snobol4 语言实现PDF页面合并
以下是一个使用 Snobol4 语言实现的PDF页面合并程序的示例：
```snobol
:INFILE1, :INFILE2, :OUTFILE
:INFILE1 'input1.pdf'
:INFILE2 'input2.pdf'
:OUTFILE 'output.pdf'
READIN :INFILE1
READIN :INFILE2
:READPAGE
:WRITEPAGE :OUTFILE
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