save project

diy2.py

@@ -6,8 +6,10 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
+
     if name != username:
         print("用户名不存在，请重试")
+        continue
     if password != userpassword:
         print("密码错误，请重试")
 print("欢迎来到贝尔编程!")