diff --git a/JJL.c b/JJL.c
index 82865e4..c1c83c0 100644
--- a/JJL.c
+++ b/JJL.c
@@ -10,6 +10,12 @@ int sub(int a,int b)
     return a-b;
 }
 
+void my_printf(int a)
+{
+    printf("\r\n\r\n%d\r\n\r\n",a);
+}
+
+
 int main()
 {
     printf("hello world!");