auto save

diy2.py

@@ -6,9 +6,10 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-
     if name!=username:
         print("用户名错误!请重新输入")
     if password!=userpassword:
         print("密码错误!请重新输入")
+    if name!=username and password!=userpassword:
+        print("用户名,密码错误!请重新输入")
 print("欢迎来到贝尔编程!")