diff --git a/JJL.c b/JJL.c
index a26b925..82865e4 100644
--- a/JJL.c
+++ b/JJL.c
@@ -5,6 +5,11 @@ int add(int a,int b)
     return a + b;
 }
 
+int sub(int a,int b)
+{
+    return a-b;
+}
+
 int main()
 {
     printf("hello world!");