save project

diy1.py

@@ -9,5 +9,9 @@ while True:
     if user == username and password == userpassword:
             print("登录成功")
             break
-    print("登录失败")
+    if user != username:
+        ptint("账号错误")
+        continue
+    if password != userpassword:
+       ptint("密码错误") 
 print("欢迎来到贝尔编程")
\ No newline at end of file