auto save

diy2.py

@@ -6,7 +6,9 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-     if userpassword!=password:
+    elif expression:
+        pass username!=name:
+        print("用户名错误！请重新输入")
+    else:
         print("密码错误！请重新输入")
-print(")来到QQif"欢迎! username!=name: print("用户名错误！请重新输入")
-   
\ No newline at end of file
+print("欢迎来到QQ!")
\ No newline at end of file