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type year = int option
let happy_new_year(year: year) = 
    Printf.printf "%d年あけましておめでとうございます。\n" year;;
happy_new_year(Some 2018);;

Compilation error #stdin compilation error #stdout 0s 16096KB

stdin

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Standard input is empty

compilation info

File "prog.ml", line 3, characters 76-80:
Error: This expression has type year = int option
       but an expression was expected of type int

stdout

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Standard output is empty

https://ideone.com/Cw9YQE

language:

OCaml (ocamlopt 4.05.0)

created:

visibility:

public

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