let s a=
match a with
|_->printf "asdf"
printf "asdf"
why it thorw a error:
This expression was expected to have type
'a -> 'b -> 'c
but here has type
unit
how i can execute multiple statement ?
thanks..
let s a=
match a with
|_->printfn "asdf";
printfn "asdf"
it runing well
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at Page72
following snipet will throw a complier error.
type BinaryTree =
| Node of int * BinaryTree * BinaryTree
| Empty
let rec printInOrder tree =
match tree with
| Node (data, left, right)
-> printInOrder left
printfn "Node %d" data
printInOrder right
| Empty
-> ()
(*
2
/ \
1 4
/ \
3 5
*)
let binTree =
Node(2,
Node(1, Empty, Empty),
Node(4,
Node(3, Empty, Empty),
Node(5, Empty, Empty)
)
)
printInOrder binTree