diff --git a/data.h b/data.h
index bb0eb95..cabc5de 100644
--- a/data.h
+++ b/data.h
@@ -85,8 +85,6 @@ bool bookempty()
 template <int MAXSIZE = 256>
 void DoAddBook()
 {
-    if (books.length == MAXSIZE) {
-        cout << "books full" << endl;}
     cout << endl << "Add Book"<< endl<<endl;
     Book book;
     input(book); //输入图书