diff --git a/DataStructure.xcodeproj/project.pbxproj b/DataStructure.xcodeproj/project.pbxproj
index 8502a27..8844060 100644
--- a/DataStructure.xcodeproj/project.pbxproj
+++ b/DataStructure.xcodeproj/project.pbxproj
@@ -25,6 +25,9 @@
 /* Begin PBXFileReference section */
 		108A953A29878C0D005C28B4 /* DataStructure */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = DataStructure; sourceTree = BUILT_PRODUCTS_DIR; };
 		108A953D29878C0D005C28B4 /* main.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = main.cpp; sourceTree = "<group>"; };
+		108A954429878C66005C28B4 /* DoubleLinkList.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = DoubleLinkList.h; sourceTree = "<group>"; };
+		108A9546298792B3005C28B4 /* CycleLinkList.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = CycleLinkList.h; sourceTree = "<group>"; };
+		108A9547298794DA005C28B4 /* CycleDoubleLinkList.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = CycleDoubleLinkList.h; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -58,6 +61,9 @@
 			isa = PBXGroup;
 			children = (
 				108A953D29878C0D005C28B4 /* main.cpp */,
+				108A9547298794DA005C28B4 /* CycleDoubleLinkList.h */,
+				108A9546298792B3005C28B4 /* CycleLinkList.h */,
+				108A954429878C66005C28B4 /* DoubleLinkList.h */,
 			);
 			path = DataStructure;
 			sourceTree = "<group>";
diff --git a/DataStructure/CycleDoubleLinkList.h b/DataStructure/CycleDoubleLinkList.h
new file mode 100644
index 0000000..be8aa2b
--- /dev/null
+++ b/DataStructure/CycleDoubleLinkList.h
@@ -0,0 +1,54 @@
+//
+//  CycleDoubleLinkList.h
+//  DataStructure
+//  循环双链表
+//  Created by Noth Amor on 2023/1/30.
+//
+
+#include <stdlib.h>
+
+#ifndef CycleDoubleLinkList_h
+#define CycleDoubleLinkList_h
+
+typedef struct DNode {
+    int data;
+    struct DNode *prior, *next;
+}DNode, *DLinkList;
+
+// 初始化空的循环双链表
+bool InitDLinkList(DLinkList &L) {
+    L = (DNode *) malloc(sizeof(DNode));
+    if (L == NULL) {
+        return false;
+    }
+    
+    L->prior = L;
+    L->next = L;
+    
+    return true;
+}
+
+// 判断循环双链表是否为空
+bool Empty(DLinkList L) {
+    return L->next == L;
+}
+
+// 循环双链表在p节点之后插入s节点
+bool InsertNextDNode(DNode *p, DNode *s) {
+    s->next = p->next;
+    p->next->prior = s;
+    s->prior = p;
+    p->next = s;
+    return true;
+}
+
+// 删除p的后继节点q
+bool DeleteDNode(DNode *p) {
+    DNode *q = p->next;
+    p->next = q->next;
+    q->next->prior = p;
+    free(q);
+    return true;
+}
+
+#endif /* CycleDoubleLinkList_h */
diff --git a/DataStructure/CycleLinkList.h b/DataStructure/CycleLinkList.h
new file mode 100644
index 0000000..050c944
--- /dev/null
+++ b/DataStructure/CycleLinkList.h
@@ -0,0 +1,40 @@
+//
+//  CycleLinkList.h
+//  DataStructure
+//  循环单链表
+//  Created by Noth Amor on 2023/1/30.
+//
+
+#include <stdlib.h>
+
+#ifndef CycleLinkList_h
+#define CycleLinkList_h
+
+typedef struct LNode{
+    int data;
+    struct LNode *next;
+}LNode, *LinkList;
+
+// 初始化循环单链表
+bool InitList(LinkList &L) {
+    L = (LNode *) malloc(sizeof(LNode));
+    if (L == NULL) {
+        return false;
+    }
+    
+    L->next = L;
+    
+    return true;
+}
+
+// 判断循环单链表是否为空
+bool Empty(LinkList L) {
+    return L->next == L;
+}
+
+// 判断节点p是否为循环单链表的表尾节点
+bool IsTail(LinkList L, LNode *p) {
+    return p->next == L;
+}
+
+#endif /* CycleLinkList_h */
diff --git a/DataStructure/DoubleLinkList.h b/DataStructure/DoubleLinkList.h
new file mode 100644
index 0000000..6369fcb
--- /dev/null
+++ b/DataStructure/DoubleLinkList.h
@@ -0,0 +1,84 @@
+//
+//  DoubleLinkList.h
+//  DataStructure
+//  双链表
+//  Created by Noth Amor on 2023/1/30.
+//
+
+#include <stdlib.h>
+
+#ifndef DoubleLinkList_h
+#define DoubleLinkList_h
+
+typedef struct DNode {
+    int data;
+    struct DNode *prior, *next;
+} DNode, *DLinkList;
+
+// 初始化双链表
+bool InitDLinkList(DLinkList &L) {
+    L = (DNode *) malloc(sizeof(DNode));
+    if (L == NULL) {
+        return false;
+    }
+    
+    L->prior = NULL;
+    L->next = NULL;
+    
+    return true;
+}
+
+// 判断双链表是否为空
+bool LinkListEmpty(DLinkList L) {
+    return L->next == NULL;
+}
+
+// 删除p节点的后继节点
+bool DeleteNextNode(DNode *p) {
+    if (p == NULL) {
+        return false;
+    }
+    
+    DNode *q = p->next;
+    
+    if (q == NULL) {
+        return false;
+    }
+    
+    p->next = q->next;
+    if (p->next != NULL) {
+        q->next->prior = p;
+    }
+    
+    free(q);
+    
+    return true;
+}
+
+// 销毁双链表
+void DestroyDLinkList(DLinkList &L) {
+    while (L->next != NULL) {
+        DeleteNextNode(L);
+    }
+    free(L);
+    L = NULL;
+}
+
+// 在p节点之后插入s节点
+bool InsertNextNode(DNode *p, DNode *s) {
+    if (p == NULL || s == NULL) {
+        return false;
+    }
+    
+    s->next = p->next;
+    if (p->next != NULL) {
+        p->next->prior = s;
+    }
+    
+    s->prior = p;
+    p->next = s;
+    
+    return true;
+}
+
+#endif /* DoubleLinkList_h */
diff --git a/DataStructure/LinkList.h b/DataStructure/LinkList.h
new file mode 100644
index 0000000..e306675
--- /dev/null
+++ b/DataStructure/LinkList.h
@@ -0,0 +1,18 @@
+//
+//  LinkList.h
+//  DataStructure
+//
+//  Created by Noth Amor on 2023/1/30.
+//
+
+#ifndef LinkList_h
+#define LinkList_h
+
+typedef struct LNode{
+    int data;
+    struct LNode *next;
+}LNode, *LinkList;
+
+
+
+#endif /* LinkList_h */
diff --git a/DataStructure/main.cpp b/DataStructure/main.cpp
index d78ac81..3fa8622 100644
--- a/DataStructure/main.cpp
+++ b/DataStructure/main.cpp
@@ -1,14 +1,16 @@
-//
-//  main.cpp
-//  DataStructure
-//
-//  Created by Noth Amor on 2023/1/30.
-//
-
 #include <iostream>
+#include <stdlib.h>
 
-int main(int argc, const char * argv[]) {
-    // insert code here...
-    std::cout << "Hello, World!\n";
+using namespace std;
+
+// 静态链表
+typedef struct {
+    int data;
+    int next;
+} SLinkList[10];
+
+int main() {
+    SLinkList s;
+    
     return 0;
 }