如何在执行cmd命令同时在窗口中动态显示已用时间

1

@echo off
set kssj=%time%
cmd /k mongodump -h 127.0.0.1 -d world -c brook -o D:\mongobachup
set jssj=%time%
set jshaomiao=%jssj:~9,2%
set jsmiao=%jssj:~6,2%
set jsfen=%jssj:~3,2%
set jsshi=%jssj:~0,2%
set/a hmjg=%jshaomiao%-%kssj:~9,2%
if %hmjg% lss 0 set/a hmjg=100+%hmjg%&set/a jsmiao=%jsmiao%-1
set/a miaojg=%jsmiao%-%kssj:~6,2%
if %miaojg% lss 0 set/a miaojg=60+%miaojg%&set/a jsfen=%jsfen%-1
set/a fenjg=%jsfen%-%kssj:~3,2%
if %fenjg% lss 0 set/a fenjg=%fenjg%+60&set/a jsshi=%jsshi%-1
set/a shijg=%jsshi%-%kssj:~0,2%
if %shijg% lss 0 set/a shijg=0-%shijg%
cls
echo 计时开始时间:%kssj%
echo 计时结束时间:%jssj%
echo _______________________________________________________________________________
echo 用时:%shijg%时%fenjg%分%miaojg%.%hmjg%秒
pause

在vista和win7下运行cmd，添加自定义路由route add总是无法成功添加，提示“The requested operation requires elevation.”，是因为没有以管理员身份运行导致。可以找到cmd，点右键选择“以管理员身份运行”，如果能每次都以管理员身份运行多好