save project

diy2.py

@@ -9,6 +9,7 @@ while True:
     if name != username:
         print("用户名不存在")
         continue
-    if password != usepassword:
+    if password != userpassword:
         print("密码有误") 
+    print("用户和密码都错误!")       
 print("欢迎来到贝尔编程!")
\ No newline at end of file