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KrYounger 6 年 前
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      README.md

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@@ -16,7 +16,7 @@ Because there are 26 letters (2×13) in the basic Latin alphabet, ROT13 is its o
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 ROT13 is used in online forums as a means of hiding spoilers, punchlines, puzzle solutions, and offensive materials from the casual glance. ROT13 has been described as the "Usenet equivalent of a magazine printing the answer to a quiz upside down".[2] ROT13 has inspired a variety of letter and word games on-line, and is frequently mentioned in newsgroup conversations.
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-Applying ROT13 to a piece of text merely requires examining its alphabetic characters and replacing each one by the letter 13 places further along in the alphabet, wrapping back to the beginning if necessary.[3] A becomes N, B becomes O, and so on up to M, which becomes Z, then the sequence continues at the beginning of the alphabet: N becomes A, O becomes B, and so on to Z, which becomes M. Only those letters which occur in the English alphabet are affected; numbers, symbols, whitespace, and all other characters are left unchanged. Because there are 26 letters in the English alphabet and 26 = 2 × 13, the ROT13 function is its own inverse:[3]
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+Applying ROT13 to a piece of text merely requires examining its alphabetic characters and replacing each one by the letter 13 places further along in the alphabet, wrapping back to the beginning if necessary.[3] A becomes N, B becomes O, and so on up to M, which becomes Z, then the sequence continues at the beginning of the alphabet: N becomes A, O becomes B, and so on to Z, which becomes M. Only those letters which occur in the English alphabet are affected; numbers, symbols, whitespace, and all other characters are left unchanged.
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 ```Java
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 String s = "we hold these truths to be self evident"
@@ -29,8 +29,10 @@ In other words, two successive applications of ROT13 restore the original text (
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 The transformation can be done using a lookup table, such as the following:
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+```
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 Input	ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
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 Output	NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm
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+```
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 For example, in the following joke, the punchline has been obscured by ROT13:
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 ```
@@ -42,3 +44,8 @@ Transforming the entire text via ROT13 form, the answer to the joke is revealed:
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 Jul qvq gur puvpxra pebff gur ebnq?
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 To get to the other side!
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 ```
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+
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+### Part2
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+
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+Make a method that reads a textfile (sonnet18.txt), encrypts it, and writes it back out to a different file (sonnet18.enc)
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+Prove that when you read in (sonnet18.enc), run the same crypt again, and prove that it produces the same original text.