auto save

diy2.py

@@ -8,6 +8,9 @@ while True:
     if name==username and password==userpassword:
         print("登录成功")
         break
-    print("错")
+    if name != username:
+        print("账号错")
+    if password != userpassword:
+        print("密码错")
 print("欢迎")
 # 如果用户输入的账号、密码正确，提示登陆
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