17 lines
503 B
Text
17 lines
503 B
Text
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INPUT "Enter a string: ", a$
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PRINT rot13$(a$)
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FUNCTION rot13$ (stg$)
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inlist$ = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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outlist$ = "NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm"
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FOR n = 1 TO LEN(stg$)
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letter$ = MID$(stg$, n, 1)
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letpos = INSTR(inlist$, letter$)
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IF letpos = 0 THEN
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rotated$ = letter$
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ELSE
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rotated$ = MID$(outlist$, letpos, 1)
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END IF
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rot13$ = rot13$ + rotated$
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NEXT
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END FUNCTION
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