smallpigs

@echo off
set xm=7&set dm=7&set std=14&set nh=7&set sum=0
for /l %%a in (1,1,%nh%) do (
for /l %%b in (1,1,%std%) do (
  for /l %%c in (1,1,%dm%) do (
   for /l %%d in (1,1,%xm%) do (
   call set /a sum=%%sum%%+4
   )
  call set /a sum=%%sum%%+4
  )
)
call set /a sum=%%sum%%+2
)
set /a sum1=%sum%+2
echo 公車上加上司機一共有%sum1%條腿，不加司機有%sum%條腿！~_~
pause>nul 2>nulCOPY

不知道這樣用FOR可不可以！