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  1. let exch chr =
  2. match chr with
  3.      'a' -> 'C'
  4. 	|'b' -> 'A'
  5. 	|'c' -> 'D'
  6. 	|'d' -> 'B';;
  7.  
  8. let rec crypt  str ?(num=0) =
  9. 		str.[num] <- exch [num]
  10. 		if num > String.length str then crypt str num+1;;
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
File "prog.ml", line 10, characters 2-4:
Syntax error: ']' expected
File "prog.ml", line 9, characters 6-7:
This '[' might be unmatched
stdout
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Standard output is empty
https://ideone.com/BVdVAN
language:
OCaml (ocamlopt 4.05.0)
created:
11 years ago
visibility:
public

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