#!/bin/sh

#here is an example of shift in action
#you should run this for yourself. to do that
#all you need to do is cut and paste this into your own script 
#or you may copy it directly to a directory of your own and re-name it to .sh


#here we go, I will assume that the command line was:
#shift.sh three little pigs

echo The program you called '$0' was $0 
echo You entered $# arguments '$#' at the command line 
echo '$1' has the value of $1 
echo '$2' has the value of $2 
echo '$3' has the value of $3
#notice that the single tics make the shell NOT evaluate the variable 

echo look in the code, there is a shift here
echo -n now please press enter to activate the first shift
#note how I use read to enable user interaction a variable called firstshift
#was created but never used
read firstshift

shift
echo '$1' has the value of $1 
echo '$2' has the value of $2 
echo '$3' has the value of $3
echo look in the code, there is a shift here

echo -n now please press enter to activate the second shift
#note how I use read to enable user interaction a variable called secondshift
#was created but never used
read shift2

shift 
echo '$1' has the value of $1 
echo '$2' has the value of $2 
echo '$3' has the value of $3
#notice that $3 and $2 no longer have any value, since they have been
#shifted up
echo Well that was actually pretty easy, now what about set sean?
echo take a look at set.sh to learn about set

#<title>CSC128: Shell Script Examples - shift builtin command   </title>