Assignment about professionally Programming a library

Assignment1/dll.h

@@ -0,0 +1,23 @@
+/*Header file for Doubly Linked List*/
+
+typedef struct dll_node_{
+
+    void *data;
+    struct dll_node_ *left;
+    struct dll_node_ *right;
+} dll_node_t;
+
+typedef struct dll_{
+    dll_node_t *head;
+} dll_t;
+
+
+/* Public Function declaration to create and return
+ * a new empty doubly linked list*/
+dll_t *
+get_new_dll();
+
+/*  Public Function declaration to add the appication
+ *  data to DLL*/
+int
+add_data_to_dll(dll_t *dll, void *appn_data);