diff --git a/main.c b/main.c
index b395388..8c99734 100644
--- a/main.c
+++ b/main.c
@@ -3,17 +3,9 @@
 
 #include "token.h"
 
-/* Flex */
-// extern FILE *yyin;
-// extern int yylex();
-// extern char* yytext;
-
-/* Bison */
-extern int yyparse();
-
 int main() 
 {
-    if (yyparse()) {
+    if (yyparse() == 0) {
         printf("Parse successful!\n");
     } else {
         printf("Parse failed!\n");