Data update
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7735 changed files with 38060 additions and 199180 deletions
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IDENTIFICATION DIVISION.
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PROGRAM-ID. CAESAR.
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DATA DIVISION.
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WORKING-STORAGE SECTION.
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01 MSG PIC X(50)
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VALUE "The quick brown fox jumped over the lazy dog.".
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01 OFFSET PIC 9(4) VALUE 7 USAGE BINARY.
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01 FROM-CHARS PIC X(52).
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01 TO-CHARS PIC X(52).
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01 TABL.
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02 PIC X(26) VALUE "abcdefghijklmnopqrstuvwxyz".
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02 PIC X(26) VALUE "ABCDEFGHIJKLMNOPQRSTUVWXYZ".
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02 PIC X(26) VALUE "abcdefghijklmnopqrstuvwxyz".
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02 PIC X(26) VALUE "ABCDEFGHIJKLMNOPQRSTUVWXYZ".
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PROCEDURE DIVISION.
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BEGIN.
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DISPLAY MSG
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PERFORM ENCRYPT
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DISPLAY MSG
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PERFORM DECRYPT
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DISPLAY MSG
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STOP RUN.
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ENCRYPT.
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MOVE TABL (1:52) TO FROM-CHARS
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MOVE TABL (1 + OFFSET:52) TO TO-CHARS
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INSPECT MSG CONVERTING FROM-CHARS TO TO-CHARS.
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DECRYPT.
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MOVE TABL (1 + OFFSET:52) TO FROM-CHARS
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MOVE TABL (1:52) TO TO-CHARS
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INSPECT MSG CONVERTING FROM-CHARS TO TO-CHARS.
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END PROGRAM CAESAR.
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@ -1,84 +0,0 @@
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>>SOURCE FORMAT IS FREE
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IDENTIFICATION DIVISION.
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PROGRAM-ID. caesar-cipher.
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ENVIRONMENT DIVISION.
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CONFIGURATION SECTION.
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REPOSITORY.
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FUNCTION encrypt
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FUNCTION decrypt.
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DATA DIVISION.
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WORKING-STORAGE SECTION.
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01 plaintext PIC X(50).
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01 offset USAGE BINARY-CHAR.
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01 encrypted-str PIC X(50).
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PROCEDURE DIVISION.
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DISPLAY "Enter a message to encrypt: " WITH NO ADVANCING
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ACCEPT plaintext
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DISPLAY "Enter the amount to shift by: " WITH NO ADVANCING
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ACCEPT offset
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MOVE encrypt(offset, plaintext) TO encrypted-str
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DISPLAY "Encrypted: " encrypted-str
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DISPLAY "Decrypted: " decrypt(offset, encrypted-str).
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END PROGRAM caesar-cipher.
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IDENTIFICATION DIVISION.
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FUNCTION-ID. encrypt.
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ENVIRONMENT DIVISION.
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CONFIGURATION SECTION.
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REPOSITORY.
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FUNCTION ALL INTRINSIC.
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DATA DIVISION.
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LOCAL-STORAGE SECTION.
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01 i USAGE INDEX.
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01 a USAGE BINARY-CHAR.
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LINKAGE SECTION.
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01 offset USAGE BINARY-CHAR.
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01 str PIC X(50).
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01 encrypted-str PIC X(50).
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PROCEDURE DIVISION USING offset, str RETURNING encrypted-str.
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PERFORM VARYING i FROM 1 BY 1 UNTIL i > LENGTH(str)
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IF str(i:1) IS NOT ALPHABETIC OR str(i:1) = SPACE
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MOVE str(i:1) TO encrypted-str(i:1)
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EXIT PERFORM CYCLE
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END-IF
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IF str(i:1) IS ALPHABETIC-UPPER
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MOVE ORD("A") TO a
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ELSE
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MOVE ORD("a") TO a
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END-IF
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MOVE CHAR(MOD(ORD(str(i:1)) - a + offset, 26) + a)
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TO encrypted-str(i:1)
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END-PERFORM
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EXIT FUNCTION.
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END FUNCTION encrypt.
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IDENTIFICATION DIVISION.
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FUNCTION-ID. decrypt.
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ENVIRONMENT DIVISION.
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CONFIGURATION SECTION.
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REPOSITORY.
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FUNCTION encrypt.
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DATA DIVISION.
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LOCAL-STORAGE SECTION.
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01 decrypt-offset USAGE BINARY-CHAR.
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LINKAGE SECTION.
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01 offset USAGE BINARY-CHAR.
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01 str PIC X(50).
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01 decrypted-str PIC X(50).
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PROCEDURE DIVISION USING offset, str RETURNING decrypted-str.
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SUBTRACT offset FROM 26 GIVING decrypt-offset
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MOVE encrypt(decrypt-offset, str) TO decrypted-str
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EXIT FUNCTION.
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END FUNCTION decrypt.
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