syntax-error - 语法错误OCaml

我开始在OCaml中编写此代码，以获取文件中每个字符的计数。

open Hashtbl;;

type 'a option = None | Some of 'a;;

let rec charCount fd ht =
  let x =
    try Some (input_char fd)
    with End_of_file -> None
  in
  match x with
  | Some c ->
    let val =
      try find (ht c)
      with Not_found -> 0
    in
    replace ht c (val+1);
    charCount fd ht
  | None -> ();;

let ht = create 0;;

let loadHisto fn =
  let fd = open_in fn
  in
  charCount fd ht;;
  loadHisto "testfile";;
  iter printf("%s => %s\n") ht;;

当我尝试使用ocamlc -c进行编译时，收到消息:
Error: Syntax error:

最佳答案

val是保留字，您不能使用它

关于syntax-error - 语法错误OCaml，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/26868293/