Snobol4【1】 语言实战：身份证号【3】校验码【4】修复实战
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 设计。它以其简洁的语法和强大的字符串处理【5】能力而闻名。本文将围绕 Snobol4 语言，通过一个身份证号校验码修复的实战案例，展示 Snobol4 语言在数据处理和字符串操作方面的强大功能。
身份证号校验码简介
身份证号是每个中国公民的唯一标识，由18位数字组成。其中，最后一位是校验码，用于验证身份证号的正确性。校验码的计算方法如下：
1. 将前17位数字分别乘以不同的系数【6】。从第一位到第十七位的系数分别为：7、9、10、5、8、4、2、1、6、3、7、9、10、5、8、4、2。
2. 将这17个乘积相加。
3. 将相加后的和除以11，得到余数【7】。
4. 根据余数，通过查表【8】得到对应的校验码。
校验码表如下：
| 余数 | 校验码 |
| ---- | ------ |
| 0 | 1 |
| 1 | 0 |
| 2 | X |
| 3 | 9 |
| 4 | 8 |
| 5 | 7 |
| 6 | 6 |
| 7 | 5 |
| 8 | 4 |
| 9 | 3 |
| 10 | 2 |
Snobol4 语言身份证号校验码修复实战
1. 环境准备
我们需要一个 Snobol4 编译器【9】。由于 Snobol4 已经很少被使用，我们可以使用一些在线的 Snobol4 编译器，如 Snobol4 Online Compiler。
2. 编写 Snobol4 代码
以下是一个 Snobol4 代码示例，用于修复身份证号中的校验码：
```snobol
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