hour

UNIX+shell范例精解（第4版）代码

#!/bin/sh
# Scriptname: hour
hour=1
until [ $hour  -gt 24 ]
do
	case "$hour" in
	[0-9] |1[0-1])	echo  "Good morning!"
		 ;;
	12)	echo  "Lunch time."

		;;
	1[3-7])	echo  "Siesta time."
		;;
	*)	echo  "Good night."
		;;
	esac
	hour=`expr $hour + 1`
done