Snobol4【1】 语言在电话号码国际格式转换【2】中的应用
电话号码的国际格式转换是一个常见的任务，尤其是在处理跨国业务或数据交换【3】时。Snobol4，作为一种古老的编程语言，以其简洁和强大的文本处理能力而闻名。本文将探讨如何使用Snobol4语言来实现电话号码的国际格式转换，包括去除非数字字符、添加国际码【4】、格式化等操作。
Snobol4 简介
Snobol4，全称为String-oriented string processing language，是一种高级编程语言，特别适合于文本处理。它由David J. Farber、John G. Kemeny 和 Thomas E. Kurtz 在1962年设计。Snobol4的特点包括：
- 强大的字符串处理【5】能力
- 简洁的表达式和语法
- 高效的运行速度
电话号码国际格式转换的需求
在进行国际电话通话或数据交换时，电话号码通常需要以下格式：
- 以国际码开头，例如：+1 (美国和加拿大)
- 数字之间可能有分隔符，如空格、破折号【6】或斜杠【7】
- 可能包含国家代码【8】、区号【9】、电话号码等
以下是一些常见的电话号码格式：
- +1 234-567-8900 (美国)
- +44 20 7123 4567 (英国)
- +49 30 12345678 (德国)
Snobol4 代码实现
以下是一个使用Snobol4语言实现的电话号码国际格式转换的示例代码。该代码将处理一个包含电话号码的字符串，去除非数字字符，并添加国际码。
```snobol
:input
'phone-number' -> phone
:action
phone -> temp
0 -> i
0 -> len
0 -> int-code
'1' -> int-code
'1' -> country-code
'1' -> area-code
'1' -> number
' ' -> space
'-' -> dash
'+' -> plus
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'+' -> plus
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
'0' -> zero
'1' -> one
'2' -> two
'3' -> three
'4' -> four
'5' -> five
'6' -> six
'7' -> seven
'8' -> eight
'9' -> nine
' ' -> space
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