shell编程---case语句

                            case语句

  1 #! /bin/bash
  2 #case judagement condition expression
  3 var=$1
  4 program=$0
  5 
  6 case $var in
  7 -h)
  8         echo usage:$program -option
  9         echo option: -h -f
 10         ;;
 11 -f)
 12         echo $var 
 13         ;;
 14 *)
 15         echo usage:$rogram -option
 16         echo option: -h or -f
 17         exit 0
 18 esac