--- /dev/null
+/* list.h -- list headers */
+
+#include <stdio.h>
+
+
+#define SINGLE 'S'
+#define DOUBLE 'D'
+
+typedef struct s_list_element {
+ struct s_list_element *next;
+ void *data;
+ int number;
+} t_list_element;
+
+typedef struct s_list {
+ t_list_element start;
+} t_list;