auto save

diy2.py

@@ -6,6 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    else:
-        print("请重新输入")
+    if name != username:
+       print("账号错误，请重新输入!") 
+    if password != userpassword:
+       print("密码错误，请重新输入!")  
 print("欢迎来到贝尔编程!")
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