diff --git a/demo.c b/demo.c
new file mode 100644
index 0000000..ad7090c
--- /dev/null
+++ b/demo.c
@@ -0,0 +1,16 @@
+  #include "ez_debug.h"
+
+int func(int x)
+{
+	ez_trace();
+	x++;
+	ez_debug("x=%d", x);
+	return x++;
+}
+
+int main()
+{
+	int y = func(1);
+	ez_debug("y=%d", y);
+
+}