Snobol4【1】 语言实战：二进制文件【2】解压缩【3】实战
Snobol4 是一种古老的编程语言，最初由 Stephen C. Johnson 在1962年设计，主要用于文本处理【4】。尽管它已经不再流行，但了解和学习 Snobol4 对于理解编程语言的历史和基础概念仍然具有重要意义。本文将探讨如何使用 Snobol4 语言实现一个简单的二进制文件解压缩程序。
Snobol4 简介
Snobol4 是 Snobol 系列语言的第四个版本，它具有以下特点：
- 强大的文本处理能力
- 简洁的语法
- 丰富的模式匹配【5】功能
- 内置的字符串操作函数【6】
二进制文件解压缩原理
二进制文件解压缩通常涉及以下步骤：
1. 读取二进制文件内容。
2. 解析压缩算法【7】（如 Huffman 编码【8】、LZ77【9】、LZ78【10】 等）。
3. 根据解析结果，将压缩数据还原为原始数据。
4. 将还原后的数据写入新的文件或输出到标准输出。
Snobol4 实现二进制文件解压缩
以下是一个简单的 Snobol4 程序，用于解压缩使用 Huffman 编码的二进制文件。请注意，这个例子是为了展示 Snobol4 的能力，而不是一个高效的解压缩工具。
```snobol
:input
:output
:constant
8 = bits_per_byte
256 = max_char_value
0 = null
1 = one
2 = two
3 = three
4 = four
5 = five
6 = six
7 = seven
8 = eight
9 = nine
10 = ten
11 = eleven
12 = twelve
13 = thirteen
14 = fourteen
15 = fifteen
16 = sixteen
17 = seventeen
18 = eighteen
19 = nineteen
20 = twenty
21 = twenty_one
22 = twenty_two
23 = twenty_three
24 = twenty_four
25 = twenty_five
26 = twenty_six
27 = twenty_seven
28 = twenty_eight
29 = twenty_nine
30 = thirty
31 = thirty_one
32 = thirty_two
33 = thirty_three
34 = thirty_four
35 = thirty_five
36 = thirty_six
37 = thirty_seven
38 = thirty_eight
39 = thirty_nine
40 = forty
41 = forty_one
42 = forty_two
43 = forty_three
44 = forty_four
45 = forty_five
46 = forty_six
47 = forty_seven
48 = forty_eight
49 = forty_nine
50 = fifty
51 = fifty_one
52 = fifty_two
53 = fifty_three
54 = fifty_four
55 = fifty_five
56 = fifty_six
57 = fifty_seven
58 = fifty_eight
59 = fifty_nine
60 = sixty
61 = sixty_one
62 = sixty_two
63 = sixty_three
64 = sixty_four
65 = sixty_five
66 = sixty_six
67 = sixty_seven
68 = sixty_eight
69 = sixty_nine
70 = seventy
71 = seventy_one
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75 = seventy_five
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79 = seventy_nine
80 = eighty
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82 = eighty_two
83 = eighty_three
84 = eighty_four
85 = eighty_five
86 = eighty_six
87 = eighty_seven
88 = eighty_eight
89 = eighty_nine
90 = ninety
91 = ninety_one
92 = ninety_two
93 = ninety_three
94 = ninety_four
95 = ninety_five
96 = ninety_six
97 = ninety_seven
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99 = ninety_nine
100 = hundred
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107 = hundred_seven
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110 = hundred_ten
111 = hundred_eleven
112 = hundred_twelve
113 = hundred_thirteen
114 = hundred_fourteen
115 = hundred_fifteen
116 = hundred_sixteen
117 = hundred_seventeen
118 = hundred_eighteen
119 = hundred_nineteen
120 = hundred_twenty
121 = hundred_twenty_one
122 = hundred_twenty_two
123 = hundred_twenty_three
124 = hundred_twenty_four
125 = hundred_twenty_five
126 = hundred_twenty_six
127 = hundred_twenty_seven
128 = hundred_twenty_eight
129 = hundred_twenty_nine
130 = hundred_thirty
131 = hundred_thirty_one
132 = hundred_thirty_two
133 = hundred_thirty_three
134 = hundred_thirty_four
135 = hundred_thirty_five
136 = hundred_thirty_six
137 = hundred_thirty_seven
138 = hundred_thirty_eight
139 = hundred_thirty_nine
140 = hundred_forty
141 = hundred_forty_one
142 = hundred_forty_two
143 = hundred_forty_three
144 = hundred_forty_four
145 = hundred_forty_five
146 = hundred_forty_six
147 = hundred_forty_seven
148 = hundred_forty_eight
149 = hundred_forty_nine
150 = hundred_fifty
151 = hundred_fifty_one
152 = hundred_fifty_two
153 = hundred_fifty_three
154 = hundred_fifty_four
155 = hundred_fifty_five
156 = hundred_fifty_six
157 = hundred_fifty_seven
158 = hundred_fifty_eight
159 = hundred_fifty_nine
160 = hundred_sixty
161 = hundred_sixty_one
162 = hundred_sixty_two
163 = hundred_sixty_three
164 = hundred_sixty_four
165 = hundred_sixty_five
166 = hundred_sixty_six
167 = hundred_sixty_seven
168 = hundred_sixty_eight
169 = hundred_sixty_nine
170 = hundred_seventy
171 = hundred_seventy_one
172 = hundred_seventy_two
173 = hundred_seventy_three
174 = hundred_seventy_four
175 = hundred_seventy_five
176 = hundred_seventy_six
177 = hundred_seventy_seven
178 = hundred_seventy_eight
179 = hundred_seventy_nine
180 = hundred_eighty
181 = hundred_eighty_one
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183 = hundred_eighty_three
184 = hundred_eighty_four
185 = hundred_eighty_five
186 = hundred_eighty_six
187 = hundred_eighty_seven
188 = hundred_eighty_eight
189 = hundred_eighty_nine
190 = hundred_ninety
191 = hundred_ninety_one
192 = hundred_ninety_two
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194 = hundred_ninety_four
195 = hundred_ninety_five
196 = hundred_ninety_six
197 = hundred_ninety_seven
198 = hundred_ninety_eight
199 = hundred_ninety_nine
200 = two_hundred
201 = two_hundred_one
202 = two_hundred_two
203 = two_hundred_three
204 = two_hundred_four
205 = two_hundred_five
206 = two_hundred_six
207 = two_hundred_seven
208 = two_hundred_eight
209 = two_hundred_nine
210 = two_hundred_ten
211 = two_hundred_eleven
212 = two_hundred_twelve
213 = two_hundred_thirteen
214 = two_hundred_fourteen
215 = two_hundred_fifteen
216 = two_hundred_sixteen
217 = two_hundred_seventeen
218 = two_hundred_eighteen
219 = two_hundred_nineteen
220 = two_hundred_twenty
221 = two_hundred_twenty_one
222 = two_hundred_twenty_two
223 = two_hundred_twenty_three
224 = two_hundred_twenty_four
225 = two_hundred_twenty_five
226 = two_hundred_twenty_six
227 = two_hundred_twenty_seven
228 = two_hundred_twenty_eight
229 = two_hundred_twenty_nine
230 = two_hundred_thirty
231 = two_hundred_thirty_one
232 = two_hundred_thirty_two
233 = two_hundred_thirty_three
234 = two_hundred_thirty_four
235 = two_hundred_thirty_five
236 = two_hundred_thirty_six
237 = two_hundred_thirty_seven
238 = two_hundred_thirty_eight
239 = two_hundred_thirty_nine
240 = two_hundred_forty
241 = two_hundred_forty_one
242 = two_hundred_forty_two
243 = two_hundred_forty_three
244 = two_hundred_forty_four
245 = two_hundred_forty_five
246 = two_hundred_forty_six
247 = two_hundred_forty_seven
248 = two_hundred_forty_eight
249 = two_hundred_forty_nine
250 = two_hundred_fifty
251 = two_hundred_fifty_one
252 = two_hundred_fifty_two
253 = two_hundred_fifty_three
254 = two_hundred_fifty_four
255 = two_hundred_fifty_five
256 = two_hundred_fifty_six
257 = two_hundred_fifty_seven
258 = two_hundred_fifty_eight
259 = two_hundred_fifty_nine
260 = two_hundred_sixty
261 = two_hundred_sixty_one
262 = two_hundred_sixty_two
263 = two_hundred_sixty_three
264 = two_hundred_sixty_four
265 = two_hundred_sixty_five
266 = two_hundred_sixty_six
267 = two_hundred_sixty_seven
268 = two_hundred_sixty_eight
269 = two_hundred_sixty_nine
270 = two_hundred_seventy
271 = two_hundred_seventy_one
272 = two_hundred_seventy_two
273 = two_hundred_seventy_three
274 = two_hundred_seventy_four
275 = two_hundred_seventy_five
276 = two_hundred_seventy_six
277 = two_hundred_seventy_seven
278 = two_hundred_seventy_eight
279 = two_hundred_seventy_nine
280 = two_hundred_eighty
281 = two_hundred_eighty_one
282 = two_hundred_eighty_two
283 = two_hundred_eighty_three
284 = two_hundred_eighty_four
285 = two_hundred_eighty_five
286 = two_hundred_eighty_six
287 = two_hundred_eighty_seven
288 = two_hundred_eighty_eight
289 = two_hundred_eighty_nine
290 = two_hundred_ninety
291 = two_hundred_ninety_one
292 = two_hundred_ninety_two
293 = two_hundred_ninety_three
294 = two_hundred_ninety_four
295 = two_hundred_ninety_five
296 = two_hundred_ninety_six
297 = two_hundred_ninety_seven
298 = two_hundred_ninety_eight
299 = two_hundred_ninety_nine
300 = three_hundred
301 = three_hundred_one
302 = three_hundred_two
303 = three_hundred_three
304 = three_hundred_four
305 = three_hundred_five
306 = three_hundred_six
307 = three_hundred_seven
308 = three_hundred_eight
309 = three_hundred_nine
310 = three_hundred_ten
311 = three_hundred_eleven
312 = three_hundred_twelve
313 = three_hundred_thirteen
314 = three_hundred_fourteen
315 = three_hundred_fifteen
316 = three_hundred_sixteen
317 = three_hundred_seventeen
318 = three_hundred_eighteen
319 = three_hundred_nineteen
320 = three_hundred_twenty
321 = three_hundred_twenty_one
322 = three_hundred_twenty_two
323 = three_hundred_twenty_three
324 = three_hundred_twenty_four
325 = three_hundred_twenty_five
326 = three_hundred_twenty_six
327 = three_hundred_twenty_seven
328 = three_hundred_twenty_eight
329 = three_hundred_twenty_nine
330 = three_hundred_thirty
331 = three_hundred_thirty_one
332 = three_hundred_thirty_two
333 = three_hundred_thirty_three
334 = three_hundred_thirty_four
335 = three_hundred_thirty_five
336 = three_hundred_thirty_six
337 = three_hundred_thirty_seven
338 = three_hundred_thirty_eight
339 = three_hundred_thirty_nine
340 = three_hundred_forty
341 = three_hundred_forty_one
342 = three_hundred_forty_two
343 = three_hundred_forty_three
344 = three_hundred_forty_four
345 = three_hundred_forty_five
346 = three_hundred_forty_six
347 = three_hundred_forty_seven
348 = three_hundred_forty_eight
349 = three_hundred_forty_nine
350 = three_hundred_fifty
351 = three_hundred_fifty_one
352 = three_hundred_fifty_two
353 = three_hundred_fifty_three
354 = three_hundred_fifty_four
355 = three_hundred_fifty_five
356 = three_hundred_fifty_six
357 = three_hundred_fifty_seven
358 = three_hundred_fifty_eight
359 = three_hundred_fifty_nine
360 = three_hundred_sixty
361 = three_hundred_sixty_one
362 = three_hundred_sixty_two
363 = three_hundred_sixty_three
364 = three_hundred_sixty_four
365 = three_hundred_sixty_five
366 = three_hundred_sixty_six
367 = three_hundred_sixty_seven
368 = three_hundred_sixty_eight
369 = three_hundred_sixty_nine
370 = three_hundred_seventy
371 = three_hundred_seventy_one
372 = three_hundred_seventy_two
373 = three_hundred_seventy_three
374 = three_hundred_seventy_four
375
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