save project

diy2.py

@@ -8,4 +8,7 @@ while True:
         break
     if name != username:
         print("用户名不存在,请重新输入！")
+        continue 
+    if password != userpassword:
+        print("密码输入有误,请重新输入！")
 print("欢迎来到贝尔编程!")
\ No newline at end of file