#!/usr/bin/ksh
#A program to query information from the tables Orders.csv and Customers.csv

#Set up an array called "Cust" with these elements: jchen13 msurjan dtrinh4 
#kchuang ahernan9

   set -A Cust jchen13 msurjan dtrinh4 kchuang ahernan9
#Test out the result. Note that to call the element of an array, we have to
#enclose the array's name with the curly brackets as follow:

echo "The elements in the array Cust are:"
echo ${Cust[*]}  #This will show the entire array as seperate string. Each
                 #element is a string by itself.
echo ${Cust[@]}  #This will also show the entire array but as an entire string.
echo ${#Cust[*]}  #This will show the number of elements in the array.
echo ${Cust[2]}  #This will show the 3rd element in the array.
echo "================================"

   index=0  #Initialize up the index of the array.

#Loop thru the elements in the array Cust.
for element in ${Cust[*]}
do
   echo ${Cust[$index]}
#We need to increment the count "index" and here is how to do it:
   ((index=$index + 1))
done

   last > user.txt #Store the logged on users' names in the file user.txt.

#You may need to pass the argument into the awk command, and here is how:
#Enclose the variable in the single quotes.

#   awk -F, '{if($1 ~/'${Cust[0]}'/) print}' user.txt

#If the variable is a string and the string contains more than ONE word, then
#we HAVE TO ENCLOSE the variable within a pair of double quotes. For example:

status="logged in"

#You may NOT get any data back, depends on how you set up the user.txt file.
   awk -F, '{if($1 ~/'"$name"'/) print}' user.txt