tellme2

Unix Shell编程权威指南的配套源代码,书是好书,不过习题没有答案,要自己做了

#!/bin/bash
# Using the new (( )) compound let command
# Scriptname: tellme2

echo -n "How old are you? "
read age
if (( age < 0 || age > 120 )) 
then
	echo "Welcome to our planet! "
	exit 1  
fi
if ((age >= 0 && age <= 12)) 
then                 
	echo "A child is a garden of verses"
elif ((age >= 13 && age <= 19 ))    
then
   echo "Rebel without a cause"
elif (( age >= 19 &&  age <=  29 ))
then   
	echo "You got the world by the tail!!"
elif  (( age >=  30 &&  age <= 39 ))
then
	echo "Thirty something..."
else
	echo "Sorry I asked"
fi