auto save

diy2.py

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