auto save

diy1.py

@@ -6,5 +6,7 @@ while true:
     if username==name and userpassword==password:
     if username==name and userpassword==password:
         print("登录成功")
         print("登录成功")
         break
         break
-    print("用户名和密码错误!请重新输入")
+    if name != username:
+        print("用户名不存在，请重新输入!")
+    if 
 print("iwuhgfjkad")
 print("iwuhgfjkad")
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