diff --git a/bin/dune b/bin/dune
index ed59a55..0294cf5 100644
--- a/bin/dune
+++ b/bin/dune
@@ -3,4 +3,4 @@
 (executable
  (name main)
  (public_name croissant)
- (libraries parser lexer ast))
+ (libraries analyzer ast))
diff --git a/bin/main.ml b/bin/main.ml
index 57a7f4a..92e059a 100644
--- a/bin/main.ml
+++ b/bin/main.ml
@@ -3,35 +3,16 @@
 open Printf
 open Ast.Print
 
-let get_lexbuf () =
-  if Array.length Sys.argv > 1 then (
-    let lexbuf = Lexing.from_channel (open_in Sys.argv.(1)) in
-    Lexing.set_filename lexbuf Sys.argv.(1);
-    lexbuf)
-  else
-    let lexbuf = Lexing.from_channel stdin in
-    Lexing.set_filename lexbuf "stdin";
-    lexbuf
+exception Error of string
 
 let () =
-  let lexbuf = get_lexbuf () in
-  let res =
-    try Parser.main Lexer.token lexbuf with
-    | Lexer.Error c ->
-        let file_name = lexbuf.lex_curr_p.pos_fname
-        and line_num = lexbuf.lex_curr_p.pos_lnum
-        and col_num = lexbuf.lex_curr_p.pos_cnum - lexbuf.lex_curr_p.pos_bol in
-        fprintf stderr "Fichier \"%s\", ligne %d, colonne %d\n%s: %s\n"
-          file_name line_num col_num "Erreur lexicale"
-          ("Caractère '" ^ String.make 1 c ^ "' inconnu");
-        exit 1
-    | Parser.Error ->
-        let file_name = lexbuf.lex_curr_p.pos_fname
-        and line_num = lexbuf.lex_curr_p.pos_lnum
-        and col_num = lexbuf.lex_curr_p.pos_cnum - lexbuf.lex_curr_p.pos_bol in
-        fprintf stderr "Fichier \"%s\", ligne %d, colonne %d\n%s: %s\n"
-          file_name line_num col_num "Erreur syntaxique" "Syntaxe incorrecte";
-        exit 1
-  in
-  let _ = res in
-  Printf.printf "%s\n" (string_of_source_file res)
\ No newline at end of file
+  (*  Array.iteri (fun i arg -> printf "%d: %s\n" i arg) Sys.argv; *)
+  let help_message = "Usage: croissant <file_path>\n"
+  and args_count = Array.length Sys.argv - 1 in
+  if args_count >= 2 then printf "%s" help_message
+  else if args_count = 1 then
+    let file_path = Sys.argv.(1) in
+    let ast = string_of_source_file (Analyzer.analyze_file file_path) in
+    printf "%s\n" ast
+  else raise (Error "interpreter from stdin is not implemented yet")
+(* TODO: Implement interpreter from stdin *)
\ No newline at end of file
diff --git a/lib/analyzer.ml b/lib/analyzer.ml
new file mode 100644
index 0000000..d3ee265
--- /dev/null
+++ b/lib/analyzer.ml
@@ -0,0 +1,28 @@
+open Printf
+
+let analyze lexbuf =
+  let ast =
+    try Parser.main Lexer.token lexbuf with
+    | Lexer.Error c ->
+        let file_name = lexbuf.lex_curr_p.pos_fname
+        and line_num = lexbuf.lex_curr_p.pos_lnum
+        and col_num = lexbuf.lex_curr_p.pos_cnum - lexbuf.lex_curr_p.pos_bol in
+        fprintf stderr "Fichier \"%s\", ligne %d, colonne %d\n%s: %s\n"
+          file_name line_num col_num "Erreur lexicale"
+          ("Caractère '" ^ String.make 1 c ^ "' inconnu");
+        exit 1
+    | Parser.Error ->
+        let file_name = lexbuf.lex_curr_p.pos_fname
+        and line_num = lexbuf.lex_curr_p.pos_lnum
+        and col_num = lexbuf.lex_curr_p.pos_cnum - lexbuf.lex_curr_p.pos_bol in
+        fprintf stderr "Fichier \"%s\", ligne %d, colonne %d\n%s: %s\n"
+          file_name line_num col_num "Erreur syntaxique" "Syntaxe incorrecte";
+        exit 1
+  in
+  ast
+
+let analyze_file file_name =
+  let file_stream = open_in file_name in
+  let lexbuf = Lexing.from_channel file_stream in
+  Lexing.set_filename lexbuf file_name;
+  analyze lexbuf
\ No newline at end of file
diff --git a/lib/dune b/lib/dune
index 100be86..88fa079 100644
--- a/lib/dune
+++ b/lib/dune
@@ -1,15 +1,16 @@
 ;lib/dune
 
-(library
- (name lexer)
- (modules lexer)
- (libraries parser))
-
 (library
  (name parser)
  (modules parser)
  (libraries ast))
 
+(library
+  (name analyzer)
+  (modules lexer analyzer)
+  (libraries parser)
+)
+
 (menhir
  (modules parser))
 
diff --git a/test/ressources/test.🥐 b/test/ressources/test.🥐
index 67f84f7..f7e8790 100644
--- a/test/ressources/test.🥐
+++ b/test/ressources/test.🥐
@@ -1,3 +1,3 @@
 /*Hello, World!*/
 
-var a = 1;
\ No newline at end of file
+var a : entier = 1;
\ No newline at end of file