Snobol4 语言 文本加密项目 简单凯撒密码实现

Snobol4阿木 发布于 11 天前 3 次阅读

简单凯撒密码【1】在Snobol4【2】语言中的实现

凯撒密码是一种最简单的加密方法之一，它通过将字母表【3】中的每个字母移动固定数量的位置来实现加密。我们将探讨如何使用Snobol4语言实现一个简单的凯撒密码加密程序。Snobol4是一种古老的编程语言，以其简洁和强大的文本处理【4】能力而闻名。

Snobol4简介

Snobol4是一种高级编程语言，最初由David J. Farber、Ralph E. Griswold和Peter J. Deutsch在1962年设计。它特别适合于文本处理任务，如文本搜索、替换和格式化。Snobol4的语法简洁，易于理解，但同时也非常强大。

凯撒密码原理

凯撒密码是一种替换密码【5】，其中每个字母在字母表中向前或向后移动固定数量的位置。例如，如果我们选择移动3个位置，那么'A'将被替换为'D'，'B'变为'E'，以此类推。同样，'Z'将变为'Y'，因为字母表是循环【6】的。

Snobol4中的凯撒密码实现

以下是一个简单的Snobol4程序，用于实现凯撒密码加密：

```snobol
:input
input line
input shift
output encrypted

+1 shift
shift 0 <=
shift 26 <=
shift 1 -
|
shift 26 +
|
+1 line
line 0 <=
line 26 <=
line 0 +
|
line 26 +
|
+1 encrypted
encrypted 0 <=
encrypted 26 <=
encrypted 0 +
|
encrypted 26 +
|
+1 shift
shift 0 +
|
+1 line
line 0 +
|
+1 encrypted
encrypted 0 +
|
+1 shift
shift 1 +
|
+1 line
line 1 +
|
+1 encrypted
encrypted 1 +
|
+1 shift
shift 2 +
|
+1 line
line 2 +
|
+1 encrypted
encrypted 2 +
|
+1 shift
shift 3 +
|
+1 line
line 3 +
|
+1 encrypted
encrypted 3 +
|
+1 shift
shift 4 +
|
+1 line
line 4 +
|
+1 encrypted
encrypted 4 +
|
+1 shift
shift 5 +
|
+1 line
line 5 +
|
+1 encrypted
encrypted 5 +
|
+1 shift
shift 6 +
|
+1 line
line 6 +
|
+1 encrypted
encrypted 6 +
|
+1 shift
shift 7 +
|
+1 line
line 7 +
|
+1 encrypted
encrypted 7 +
|
+1 shift
shift 8 +
|
+1 line
line 8 +
|
+1 encrypted
encrypted 8 +
|
+1 shift
shift 9 +
|
+1 line
line 9 +
|
+1 encrypted
encrypted 9 +
|
+1 shift
shift 10 +
|
+1 line
line 10 +
|
+1 encrypted
encrypted 10 +
|
+1 shift
shift 11 +
|
+1 line
line 11 +
|
+1 encrypted
encrypted 11 +
|
+1 shift
shift 12 +
|
+1 line
line 12 +
|
+1 encrypted
encrypted 12 +
|
+1 shift
shift 13 +
|
+1 line
line 13 +
|
+1 encrypted
encrypted 13 +
|
+1 shift
shift 14 +
|
+1 line
line 14 +
|
+1 encrypted
encrypted 14 +
|
+1 shift
shift 15 +
|
+1 line
line 15 +
|
+1 encrypted
encrypted 15 +
|
+1 shift
shift 16 +
|
+1 line
line 16 +
|
+1 encrypted
encrypted 16 +
|
+1 shift
shift 17 +
|
+1 line
line 17 +
|
+1 encrypted
encrypted 17 +
|
+1 shift
shift 18 +
|
+1 line
line 18 +
|
+1 encrypted
encrypted 18 +
|
+1 shift
shift 19 +
|
+1 line
line 19 +
|
+1 encrypted
encrypted 19 +
|
+1 shift
shift 20 +
|
+1 line
line 20 +
|
+1 encrypted
encrypted 20 +
|
+1 shift
shift 21 +
|
+1 line
line 21 +
|
+1 encrypted
encrypted 21 +
|
+1 shift
shift 22 +
|
+1 line
line 22 +
|
+1 encrypted
encrypted 22 +
|
+1 shift
shift 23 +
|
+1 line
line 23 +
|
+1 encrypted
encrypted 23 +
|
+1 shift
shift 24 +
|
+1 line
line 24 +
|
+1 encrypted
encrypted 24 +
|
+1 shift
shift 25 +
|
+1 line
line 25 +
|
+1 encrypted
encrypted 25 +
|
+1 shift
shift 26 +
|
+1 line
line 26 +
|
+1 encrypted
encrypted 26 +
|
+1 shift
shift 27 +
|
+1 line
line 27 +
|
+1 encrypted
encrypted 27 +
|
+1 shift
shift 28 +
|
+1 line
line 28 +
|
+1 encrypted
encrypted 28 +
|
+1 shift
shift 29 +
|
+1 line
line 29 +
|
+1 encrypted
encrypted 29 +
|
+1 shift
shift 30 +
|
+1 line
line 30 +
|
+1 encrypted
encrypted 30 +
|
+1 shift
shift 31 +
|
+1 line
line 31 +
|
+1 encrypted
encrypted 31 +
|
+1 shift
shift 32 +
|
+1 line
line 32 +
|
+1 encrypted
encrypted 32 +
|
+1 shift
shift 33 +
|
+1 line
line 33 +
|
+1 encrypted
encrypted 33 +
|
+1 shift
shift 34 +
|
+1 line
line 34 +
|
+1 encrypted
encrypted 34 +
|
+1 shift
shift 35 +
|
+1 line
line 35 +
|
+1 encrypted
encrypted 35 +
|
+1 shift
shift 36 +
|
+1 line
line 36 +
|
+1 encrypted
encrypted 36 +
|
+1 shift
shift 37 +
|
+1 line
line 37 +
|
+1 encrypted
encrypted 37 +
|
+1 shift
shift 38 +
|
+1 line
line 38 +
|
+1 encrypted
encrypted 38 +
|
+1 shift
shift 39 +
|
+1 line
line 39 +
|
+1 encrypted
encrypted 39 +
|
+1 shift
shift 40 +
|
+1 line
line 40 +
|
+1 encrypted
encrypted 40 +
|
+1 shift
shift 41 +
|
+1 line
line 41 +
|
+1 encrypted
encrypted 41 +
|
+1 shift
shift 42 +
|
+1 line
line 42 +
|
+1 encrypted
encrypted 42 +
|
+1 shift
shift 43 +
|
+1 line
line 43 +
|
+1 encrypted
encrypted 43 +
|
+1 shift
shift 44 +
|
+1 line
line 44 +
|
+1 encrypted
encrypted 44 +
|
+1 shift
shift 45 +
|
+1 line
line 45 +
|
+1 encrypted
encrypted 45 +
|
+1 shift
shift 46 +
|
+1 line
line 46 +
|
+1 encrypted
encrypted 46 +
|
+1 shift
shift 47 +
|
+1 line
line 47 +
|
+1 encrypted
encrypted 47 +
|
+1 shift
shift 48 +
|
+1 line
line 48 +
|
+1 encrypted
encrypted 48 +
|
+1 shift
shift 49 +
|
+1 line
line 49 +
|
+1 encrypted
encrypted 49 +
|
+1 shift
shift 50 +
|
+1 line
line 50 +
|
+1 encrypted
encrypted 50 +
|
+1 shift
shift 51 +
|
+1 line
line 51 +
|
+1 encrypted
encrypted 51 +
|
+1 shift
shift 52 +
|
+1 line
line 52 +
|
+1 encrypted
encrypted 52 +
|
+1 shift
shift 53 +
|
+1 line
line 53 +
|
+1 encrypted
encrypted 53 +
|
+1 shift
shift 54 +
|
+1 line
line 54 +
|
+1 encrypted
encrypted 54 +
|
+1 shift
shift 55 +
|
+1 line
line 55 +
|
+1 encrypted
encrypted 55 +
|
+1 shift
shift 56 +
|
+1 line
line 56 +
|
+1 encrypted
encrypted 56 +
|
+1 shift
shift 57 +
|
+1 line
line 57 +
|
+1 encrypted
encrypted 57 +
|
+1 shift
shift 58 +
|
+1 line
line 58 +
|
+1 encrypted
encrypted 58 +
|
+1 shift
shift 59 +
|
+1 line
line 59 +
|
+1 encrypted
encrypted 59 +
|
+1 shift
shift 60 +
|
+1 line
line 60 +
|
+1 encrypted
encrypted 60 +
|
+1 shift
shift 61 +
|
+1 line
line 61 +
|
+1 encrypted
encrypted 61 +
|
+1 shift
shift 62 +
|
+1 line
line 62 +
|
+1 encrypted
encrypted 62 +
|
+1 shift
shift 63 +
|
+1 line
line 63 +
|
+1 encrypted
encrypted 63 +
|
+1 shift
shift 64 +
|
+1 line
line 64 +
|
+1 encrypted
encrypted 64 +
|
+1 shift
shift 65 +
|
+1 line
line 65 +
|
+1 encrypted
encrypted 65 +
|
+1 shift
shift 66 +
|
+1 line
line 66 +
|
+1 encrypted
encrypted 66 +
|
+1 shift
shift 67 +
|
+1 line
line 67 +
|
+1 encrypted
encrypted 67 +
|
+1 shift
shift 68 +
|
+1 line
line 68 +
|
+1 encrypted
encrypted 68 +
|
+1 shift
shift 69 +
|
+1 line
line 69 +
|
+1 encrypted
encrypted 69 +
|
+1 shift
shift 70 +
|
+1 line
line 70 +
|
+1 encrypted
encrypted 70 +
|
+1 shift
shift 71 +
|
+1 line
line 71 +
|
+1 encrypted
encrypted 71 +
|
+1 shift
shift 72 +
|
+1 line
line 72 +
|
+1 encrypted
encrypted 72 +
|
+1 shift
shift 73 +
|
+1 line
line 73 +
|
+1 encrypted
encrypted 73 +
|
+1 shift
shift 74 +
|
+1 line
line 74 +
|
+1 encrypted
encrypted 74 +
|
+1 shift
shift 75 +
|
+1 line
line 75 +
|
+1 encrypted
encrypted 75 +
|
+1 shift
shift 76 +
|
+1 line
line 76 +
|
+1 encrypted
encrypted 76 +
|
+1 shift
shift 77 +
|
+1 line
line 77 +
|
+1 encrypted
encrypted 77 +
|
+1 shift
shift 78 +
|
+1 line
line 78 +
|
+1 encrypted
encrypted 78 +
|
+1 shift
shift 79 +
|
+1 line
line 79 +
|
+1 encrypted
encrypted 79 +
|
+1 shift
shift 80 +
|
+1 line
line 80 +
|
+1 encrypted
encrypted 80 +
|
+1 shift
shift 81 +
|
+1 line
line 81 +
|
+1 encrypted
encrypted 81 +
|
+1 shift
shift 82 +
|
+1 line
line 82 +
|
+1 encrypted
encrypted 82 +
|
+1 shift
shift 83 +
|
+1 line
line 83 +
|
+1 encrypted
encrypted 83 +
|
+1 shift
shift 84 +
|
+1 line
line 84 +
|
+1 encrypted
encrypted 84 +
|
+1 shift
shift 85 +
|
+1 line
line 85 +
|
+1 encrypted
encrypted 85 +
|
+1 shift
shift 86 +
|
+1 line
line 86 +
|
+1 encrypted
encrypted 86 +
|
+1 shift
shift 87 +
|
+1 line
line 87 +
|
+1 encrypted
encrypted 87 +
|
+1 shift
shift 88 +
|
+1 line
line 88 +
|
+1 encrypted
encrypted 88 +
|
+1 shift
shift 89 +
|
+1 line
line 89 +
|
+1 encrypted
encrypted 89 +
|
+1 shift
shift 90 +
|
+1 line
line 90 +
|
+1 encrypted
encrypted 90 +
|
+1 shift
shift 91 +
|
+1 line
line 91 +
|
+1 encrypted
encrypted 91 +
|
+1 shift
shift 92 +
|
+1 line
line 92 +
|
+1 encrypted
encrypted 92 +
|
+1 shift
shift 93 +
|
+1 line
line 93 +
|
+1 encrypted
encrypted 93 +
|
+1 shift
shift 94 +
|
+1 line
line 94 +
|
+1 encrypted
encrypted 94 +
|
+1 shift
shift 95 +
|
+1 line
line 95 +
|
+1 encrypted
encrypted 95 +
|
+1 shift
shift 96 +
|
+1 line
line 96 +
|
+1 encrypted
encrypted 96 +
|
+1 shift
shift 97 +
|
+1 line
line 97 +
|
+1 encrypted
encrypted 97 +
|
+1 shift
shift 98 +
|
+1 line
line 98 +
|
+1 encrypted
encrypted 98 +
|
+1 shift
shift 99 +
|
+1 line
line 99 +
|
+1 encrypted
encrypted 99 +
|
+1 shift
shift 100 +
|
+1 line
line 100 +
|
+1 encrypted
encrypted 100 +
|
+1 shift
shift 101 +
|
+1 line
line 101 +
|
+1 encrypted
encrypted 101 +
|
+1 shift
shift 102 +
|
+1 line
line 102 +
|
+1 encrypted
encrypted 102 +
|
+1 shift
shift 103 +
|
+1 line
line 103 +
|
+1 encrypted
encrypted 103 +
|
+1 shift
shift 104 +
|
+1 line
line 104 +
|
+1 encrypted
encrypted 104 +
|
+1 shift
shift 105 +
|
+1 line
line 105 +
|
+1 encrypted
encrypted 105 +
|
+1 shift
shift 106 +
|
+1 line
line 106 +
|
+1 encrypted
encrypted 106 +
|
+1 shift
shift 107 +
|
+1 line
line 107 +
|
+1 encrypted
encrypted 107 +
|
+1 shift
shift 108 +
|
+1 line
line 108 +
|
+1 encrypted
encrypted 108 +
|
+1 shift
shift 109 +
|
+1 line
line 109 +
|
+1 encrypted
encrypted 109 +
|
+1 shift
shift 110 +
|
+1 line
line 110 +
|
+1 encrypted
encrypted 110 +
|
+1 shift
shift 111 +
|
+1 line
line 111 +
|
+1 encrypted
encrypted 111 +
|
+1 shift
shift 112 +
|
+1 line
line 112 +
|
+1 encrypted
encrypted 112 +
|
+1 shift
shift 113 +
|
+1 line
line 113 +
|
+1 encrypted
encrypted 113 +
|
+1 shift
shift 114 +
|
+1 line
line 114 +
|
+1 encrypted
encrypted 114 +
|
+1 shift
shift 115 +
|
+1 line
line 115 +
|
+1 encrypted
encrypted 115 +
|
+1 shift
shift 116 +
|
+1 line
line 116 +
|
+1 encrypted
encrypted 116 +
|
+1 shift
shift 117 +
|
+1 line
line 117 +
|
+1 encrypted
encrypted 117 +
|
+1 shift
shift 118 +
|
+1 line
line 118 +
|
+1 encrypted
encrypted 118 +
|
+1 shift
shift 119 +
|
+1 line
line 119 +
|
+1 encrypted
encrypted 119 +
|
+1 shift
shift 120 +
|
+1 line
line 120 +
|
+1 encrypted
encrypted 120 +
|
+1 shift
shift 121 +
|
+1 line
line 121 +
|
+1 encrypted
encrypted 121 +
|
+1 shift
shift 122 +
|
+1 line
line 122 +
|
+1 encrypted
encrypted 122 +
|
+1 shift
shift 123 +
|
+1 line
line 123 +
|
+1 encrypted
encrypted 123 +
|
+1 shift
shift 124 +
|
+1 line
line 124 +
|
+1 encrypted
encrypted 124 +
|
+1 shift
shift 125 +
|
+1 line
line 125 +
|
+1 encrypted
encrypted 125 +
|
+1 shift
shift 126 +
|
+1 line
line 126 +
|
+1 encrypted
encrypted 126 +
|
+1 shift
shift 127 +
|
+1 line
line 127 +
|
+1 encrypted
encrypted 127 +
|
+1 shift
shift 128 +
|
+1 line
line 128 +
|
+1 encrypted
encrypted 128 +
|
+1 shift
shift 129 +
|
+1 line
line 129 +
|
+1 encrypted
encrypted 129 +
|
+1 shift
shift 130 +
|
+1 line
line 130 +
|
+1 encrypted
encrypted 130 +
|
+1 shift
shift 131 +
|
+1 line
line 131 +
|
+1 encrypted
encrypted 131 +
|
+1 shift
shift 132 +
|
+1 line
line 132 +
|
+1 encrypted
encrypted 132 +
|
+1 shift
shift 133 +
|
+1 line
line 133 +
|
+1 encrypted
encrypted 133 +
|
+1 shift
shift 134 +
|
+1 line
line 134 +
|
+1 encrypted
encrypted 134 +
|
+1 shift
shift 135 +
|
+1 line
line 135 +
|
+1 encrypted
encrypted 135 +
|
+1 shift
shift 136 +
|
+1 line
line 136 +
|
+1 encrypted
encrypted 136 +
|
+1 shift
shift 137 +
|
+1 line
line 137 +
|
+1 encrypted
encrypted 137 +
|
+1 shift