save project

diy2.py

@@ -5,5 +5,8 @@ while True:
     password = input("请输入密码:")
     if name == username and password == userpassword:
         print("登录成功!")
-    if name != 
+    if name != username:
+        print('用户名错误')
+    if password != userpassword:
+        print('密码错误')
 print("欢迎来到贝尔编程!")
\ No newline at end of file