Snobol4 语言 高效处理字符串中的大小写字母的随机排列

阿木博主一句话概括：Snobol4^【1】 语言在字符串大小写字母^【2】随机排列^【3】处理中的应用

阿木博主为你简单介绍：
Snobol4 是一种古老的编程语言，以其简洁和强大的文本处理能力^【4】而闻名。本文将探讨如何利用 Snobol4 语言高效处理字符串中的大小写字母的随机排列。通过分析 Snobol4 的语法和特性，我们将实现一个简单的程序，该程序能够接受一个字符串，然后随机排列其中的大小写字母，生成一个新的字符串。

关键词：Snobol4，字符串处理^【5】，大小写字母，随机排列

一、
Snobol4，全称为String-oriented Programming and Symbolic Operations on Binary and Linked Lists，是一种在 1962 年由David J. Farber 和Ralph E. Griswold 设计的编程语言。它以其强大的文本处理能力而著称，尤其是在模式匹配^【6】和字符串操作方面。本文将展示如何使用 Snobol4 语言来处理字符串中的大小写字母，并实现随机排列的功能。

二、Snobol4 语言简介
Snobol4 语言具有以下特点：
1. 强大的文本处理能力。
2. 简洁的语法。
3. 高效的模式匹配。
4. 内置的字符串操作函数。

三、问题分析
我们需要实现的功能是将一个字符串中的大小写字母随机排列。这涉及到以下几个步骤：
1. 识别字符串中的大小写字母。
2. 将大小写字母从字符串中分离出来。
3. 随机排列这些字母。
4. 将排列后的字母重新插入到原字符串的位置。

四、Snobol4 程序实现
以下是一个使用 Snobol4 语言实现的程序，用于处理字符串中的大小写字母随机排列：

```snobol
:input
input line
:upper
copy line to upper
replace 'a'-'z' with 'A'-'Z'
:lower
copy line to lower
replace 'A'-'Z' with 'a'-'z'
:shuffle
let upper to upper
let lower to lower
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