1

data.h

@@ -217,6 +217,15 @@ void DoSortBook()
     cout << endl << "Sort Books" << endl << endl;
     int a=0;
     if (bookempty()) cout << "Book data empty"<< endl;
-
+    else {
+        for (int i=1;i<books.length;i++)
+        for (int j=books.length;j>0;j--)
+        {
+            if (books.elem[i].id>books.elem[j].id) {
+                auto temp=books.elem[i];books.elem[i]=books.elem[j];books.elem[j]=temp;}
+        }
+    }
+    cout << "*****************************" <<endl;
+    cout << "Sort success"<<endl;
 }  
 #endif // DATA_H_INCLUDED