Snobol4【1】 语言实战：身份证号【2】地区名称【3】映射实战
Snobol4 是一种古老的编程语言，最初于1962年由David J. Farber、Ralph E. Griswold 和 Ivan P. Polonsky 在贝尔实验室【4】开发。它以其独特的文本处理【5】能力和简洁的语法而闻名。尽管Snobol4在现代编程语言中并不常见，但它在文本处理和数据处理【6】领域仍有其独特的应用价值。
本文将围绕Snobol4 语言，通过一个身份证号地区名称映射的实战案例，展示如何使用Snobol4 进行数据处理和映射。
Snobol4 简介
Snobol4 是 Snobol 系列语言的第四个版本，它继承了 Snobol3 的特点，并增加了一些新的功能和改进。Snobol4 的主要特点包括：
- 强大的文本处理能力
- 简洁的语法
- 高效的运行速度【7】
- 支持多种数据类型，包括字符串【8】、数字和布尔值【9】
身份证号地区名称映射背景
在中国，身份证号是每个人的唯一身份标识。身份证号由18位数字组成，其中前6位代表地区编码【10】。这些地区编码与中国的行政区划相对应，因此可以通过身份证号的前6位数字快速查询到对应的地区名称。
实战案例：身份证号地区名称映射
数据准备
我们需要准备一个地区编码与地区名称的映射表【11】。以下是一个简单的映射表：
地区编码 | 地区名称
---------|---------
110000 | 北京市
120000 | 天津市
130000 | 河北省
...
Snobol4 代码实现
以下是一个使用 Snobol4 实现的身份证号地区名称映射的示例代码：
```snobol
:input
:output
:assign region_code region_name
:for each line
:if line contains "身份证号"
:assign line to id_number
:else
:if line contains "地区编码" and line contains "地区名称"
:assign line to region_info
:else
:assign line to region_info
:end
:end
:end
:for each character in id_number
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
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:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
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:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
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:if character is digit
:assign character to region_code
:else
:assign character to region_code
:end
:end
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:assign character to region_code
:else
:assign character to region_code
:end
:end
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:assign character to region_code
:end
:end
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:end
:end
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:if character is digit
:assign character to region_code
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:assign character to region_code
:end
:end
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:assign character to region_code
:end
:end
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:if character is digit
:assign character to region_code
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:assign character to region_code
:end
:end
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:assign character to region_code
:end
:end
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:end
:end
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:assign character to region_code
:end
:end
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:assign character to region_code
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:assign character to region_code
:end
:end
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:if character is digit
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:assign character to region_code
:end
:end
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:if character is digit
:assign character to region_code
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:end
:end
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:assign character to region_code
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:end
:end
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:end
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:end
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:end
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:end
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:end
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:end
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:end
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:end
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:end
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:if character is digit
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:assign character to region_code
:end
:end
:for each character in region_code
:if character is digit
:assign character to region_code
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