用cmd編程，編個計時器吧

title?Time?&?color?02?&?mode?con:?COLS=25?LINES=4

set?s=0

set?m=0

set?h=0

:check

cls

echo.

echo.?%h%:%m%:%s%

echo.

choice?/t?1?/d?y?/n?>nul

set?/a?s=s+1

if?%s%==60?(set?/a?m=m+1?&?set?s=0)

if?%m%==60?(set?/a?h=h+1?&?set?m=0)

goto?check