syntax-error - 完成的单词给我语法错误ocaml？

Question

我试图在ocaml中做一会儿做完循环，但是我在第21行(刚说完成的那一行)上有语法错误，我不知道这是什么错误。

let ver = 1 in
while ver > 0  do 
let () = Printf.printf "Olá, insere o número de casas que o tabuleiro tem numa linha, separe por um espaço\n" in
let tudo = read_line () in (* Le a linha inserida*)
let ncc = tudo.[0] in (*ncc = Numero de Casas Char*)
let ncs = Char.escaped ncc in (*ncs = Numero de Casas String*)
let nc = int_of_string ncs in (* passa a string para int para termos o numero de casas em int para podermos trabalhar*)
let () = Printf.printf "%d" nc in
let pcc = tudo.[2] in
let pcs = Char.escaped pcc in
let pc = int_of_string pcs in
let () = Printf.printf "%d" pc in
let a1c = tudo.[4] in
let a1s = Char.escaped a1c in
let a1 = int_of_string a1s in
let () = Printf.printf "%d" a1 in
let b1c = tudo.[6] in
let b1s = Char.escaped b1c in
let b1 = int_of_string b1s in
let ver = if (nc < 51 && nc > 0 && pc < 9 && pc > 0  ) then 0 else  1 in
done

Answer 1

您在done之前的最后一行计算ver的值，但是对此不执行任何操作。以in结尾的表达式是没有意义的。

可能是您在in之后缺少表达式。否则，不清楚为什么要计算ver。