cmd Get the drag and drop file name

1、
@echo off & setlocal enableDelayedExpansion
set a=
set /p a=Please drag your txt file for split:  
cls
:: %% Two percent signs without filename suffix
for %%k in (%a%) do set wjm=%%~nk

2. 
Call call echo %~nx1

set /p a=Please drag your txt file for split:

call :getname !a!
:getname
echo  %~nx1