diff --git a/test.c b/test.c
index 1d57237..c312b01 100644
--- a/test.c
+++ b/test.c
@@ -1,4 +1,4 @@
-void printf(char* b);
+void printf(char* b, int num);
 
 int fibonacci(int n) {
     if (n < 2)
@@ -7,6 +7,6 @@ int fibonacci(int n) {
 }
 
 int main() {
-    printf("hello world!");
-    return fibonacci(10);
+    printf("10th fibonacci number is %d!", fibonacci(10));
+    return 0;
 }
\ No newline at end of file