auto save

diy2.py

@@ -6,6 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
+    if name != username:
+        print('账号输入错误')
     else:
-        print('登录失败')
+        print('密码输入错误')
 print('欢迎来到编程世界')
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