diff --git a/calculator.c b/calculator.c
index 176f397..0ba436d 100644
--- a/calculator.c
+++ b/calculator.c
@@ -7,9 +7,11 @@ void add(int a, int b)
 void sub(int a, int b)
 {
 	printf("a - b = %d\n", a - b);
+
 }
 void mul()
 {
+
 }
 void div()
 {