diff --git a/.gitignore b/.gitignore
index af66c13..4597f37 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
 patch/
 .vscode/
-./JJL.c
\ No newline at end of file
diff --git a/JJL.c b/JJL.c
new file mode 100644
index 0000000..bf6b9f2
--- /dev/null
+++ b/JJL.c
@@ -0,0 +1,28 @@
+#include "stdio.h"
+
+int add(int a,int b)
+{
+    return a + b;
+}
+
+int multiply(int a,int b)
+{
+    return a * b;
+}
+
+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!");
+    return 0;
+}
\ No newline at end of file