diff --git a/DoubleLink.txt b/DoubleLink.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f390c8af1c7ad8774c85b256a5a988ec3a7c387f
--- /dev/null
+++ b/DoubleLink.txt
@@ -0,0 +1,60 @@
+include"DList.h"
+#include<malloc.h>
+#include<stdlib.h>
+Position MakeNode(Item i)
+{
+	PNode p = NULL; 
+	p = (PNode)malloc(sizeof(Node));
+	if(p!=NULL)
+	{
+		p->data = i;
+		p->previous = NULL;
+		p->next = NULL;
+	}	
+	return p;
+
+void FreeNode(PNode p)
+{
+	 free(p);
+}
+DList * InitList()
+{
+	DList *plist = (DList *)malloc(sizeof(DList));
+	PNode head = MakeNode(0); 
+	if(plist!=NULL)
+	{
+		if(head!=NULL)
+		{
+			plist->head = head;
+			plist->tail = head;
+			plist->size = 0;
+		}
+		else
+			return NULL;
+	}
+	return plist;
+}
+void ClearList(DList *plist)
+{
+	PNode temp,p;
+	p = GetTail(plist);
+	while(!IsEmpty(plist))
+	{	
+		temp = GetPrevious(p);
+		FreeNode(p);
+		p = temp;
+		plist->tail = temp;
+		plist->size--;
+	}
+}
+ 
+Position GetHead(DList *plist)
+{
+	return plist->head;
+}
+ 
+Position GetTail(DList *plist)
+{
+	return plist->tail;
+}
+
diff --git "a/\346\226\260\345\273\272\346\226\207\346\234\254\346\226\207\346\241\243.txt" "b/\346\226\260\345\273\272\346\226\207\346\234\254\346\226\207\346\241\243.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..bfd68798444f43f1fd311e9ee8768c6a618969eb
--- /dev/null
+++ "b/\346\226\260\345\273\272\346\226\207\346\234\254\346\226\207\346\241\243.txt"
@@ -0,0 +1 @@
+fsfsf