请问高手看看下代码为何不能运行，谢谢了

@璐村惂鐢ㄦ埛_000076K馃惥 off
set/p a=请输入:
if /i "%a%" equ "txt"(
goto aa
) else /i "%a%" equ "vbs"(
goto bb
)else /i "%a%" equ "bat"
goto cc
:aa
echo.&echo "已新建txt文件"
@echo=>>c:\\users\\administrator\\desktop\\New.txt
pause
goto start
:bb
echo.&echo "新建vbs文件"
cd>c:\\users\\administrator\\desktop\\New.vbs
pause
:cc
echo.&echo"新建bat文件"
cd>c:\\users\\administrator\\desktop\\New.bat
timeout /t 9