arlionn 发表于 2010-1-20 17:25
cap program drop mytest
program mytest
  version 11
  args l1 l2
  if `"`2'"' ==""{
    dis as error "You must specify two arguments, not one!"
    exit
  }
  if `"`3'"' !=""{
    dis as error "You can not specify more than two arguments"
    exit
  }
  sysuse auto,clear
  replace price=`l1'+`l2'
end

sungmoo 发表于 2010-1-20 21:09
*试一下
pr mytest
  if wordcount("`0'")!=2{
    di in red "Too few or many numbers"
    exit
  }
  use auto,clear
  replace price=`1'+`2'
end

sungmoo 发表于 2010-1-20 21:09
*试一下
  if wordcount("`0'")!=2

jzhyue 发表于 2010-1-25 19:48 用`*'代`0'后结果一样,两者都表示全部macros?