설치하기

• apt-get install ocaml
• ocaml-3.10.0-win-mgw.exe

몸 풀기

$ ocaml

# 2 + 2;;
- : int = 4

# print_endline "Hello, world!";;
Hello, world!

# #quit;;

파일 실행하기

$ cat > hello.ml
print_endline "Hello, world!";;

$ ocaml hello.ml
Hello, world!

$ ocaml
# #use "hello.ml";;
Hello, world!

컴파일하기

$ ocamlc -o hello hello.ml
$ file ./hello
./hello: a /usr/bin/ocamlrun script text executable
$ ./hello
Hello, world!

$ ocamlopt -o hello.opt hello.ml
$ file ./hello.opt
./hello.opt: ELF 32-bit LSB executable, Intel 80386...
$ ./hello.opt
Hello, world!

기본 자료형

• bool: true, false
• int: 0, 1, 2
• float: 0.1, 1.0, 1e1
• char: 'a', 'b', 'c'
• string: "SPARCS"

선언, 문자열, 배열

# let i = 0;;
# i;;
- : int = 0

# let s = "SPARCS";;
# s.[0];;
- : char = 'S'

# let a = [|0; 0; 0|];;
# a.(0) <- 1;;
# a.(0);;
- : int = 1

레코드

# type date = {year: int; month: int; day: int};;
# let today = {year=2008; month=3; day=3};;
# today.year;;
- : int = 2008

# type counter = {mutable count: int};;
# let c = {count=0};;
# c.count <- c.count + 1;;
# c.count;;
- : int = 1

레퍼런스

# let c = ref 0;;
# !c;;
- : int = 0
# c := 10;;
# !c;;
- : int = 10