diff --git a/图书管理系统.c b/图书管理系统.c
index d7ca4af..01c428f 100644
--- a/图书管理系统.c
+++ b/图书管理系统.c
@@ -109,7 +109,70 @@ void ShowLibBook(Book* book1)
 }
 
 //C4
-
+Book* AddBook(Book* book1)
+{
+    Book* book = book1;
+    if (book == NULL)
+    {
+        Book* tmp = (Book*)malloc(sizeof(Book));
+        tmp->next = NULL;
+        assert(tmp);
+        printf("输入书的编号:");
+        scanf("%d", &tmp->iNum);
+        getchar();
+        printf("输入书的名称:");
+        gets(&tmp->acName);
+        printf("输入书的作者:");
+        gets(tmp->acAuthor);
+        printf("输入书的出版社:");
+        gets(tmp->acPress);
+        printf("输入书的库存量:");
+        scanf("%d", &tmp->iAmount);
+        book = tmp;
+        printf("按任意键返回\n");
+        getchar();
+        return book;
+        return;
+    }
+    while (1)
+    {
+        while (book->next == NULL)
+        {
+            int flag = 1;
+            while (flag)
+            {
+                Book* tmp = (Book*)malloc(sizeof(Book));
+                tmp->next = NULL;
+                assert(tmp);
+                printf("输入书的编号:");
+                scanf("%d", &tmp->iNum);
+                getchar();
+                printf("输入书的名称:");
+                gets(&tmp->acName);
+                printf("输入书的作者:");
+                gets(tmp->acAuthor);
+                printf("输入书的出版社:");
+                gets(tmp->acPress);
+                printf("输入书的库存量:");
+                scanf("%d", &tmp->iAmount);
+                book->next = tmp;
+                printf("是否继续输入:1==>继续\t0==>结束\t");
+                scanf("%d", &flag);
+                getchar();
+                if (flag == 0)
+                {
+                    printf("按任意键返回\n");
+                    getchar();
+                    return book1;
+                }
+            }
+        }
+        book = book->next;
+    }
+    printf("按任意键返回\n");
+    getchar();
+    return;
+}
 //C5
 
 //C6