Shell Programming and Scripting

Hi, I am trying to combine 2 strings into one new string. I know there are existing threads on this topic, but I am having troubles. The variables have variables within their names which is causing me problems. Bad subsitution is the error.

The problem line is in red below.

thanks (again) to all that can help!

##!/bin/bash
## userprocesses

nousers=$( who | wc -l )
usercnt=1 # counter used in setup
pos=1
userout=1

who -q | sort -d > tempA
set -- $( cut -f "$pos" tempA);

##Put usernames into TempA
while [ $usercnt -le $nousers ]
do
eval user${pos}=$1
shift
usercnt=$(( $usercnt + 1 ))
pos=$(( $pos + 1 ))
done
rm tempA; > tempA;
namecnt=1
while [ "$namecnt" -le "$nousers" ]
do
grep $user${namecnt} /etc/passwd | cut -d: -f5 >> tempA
namecnt=$(( $namecnt + 1 ))
done

##getting real names
set -- $( cut -f1 tempA )
shiftcnt=1
while [ $shiftcnt -le 15 ]
do
shift
shiftcnt=$(( $shiftcnt + 1 ))
done

count1=1
while [ $count1 -le $nousers ]
do
eval realfirstname${count1}=$1
shift
count1=$(( count1 + 1 ))
done

intA=1
intB=2
while [ $intA -le $nousers ]
do
eval realname${intA}= [${realfirstname${intA}}]${realfirstname${intB}}]

intA=$(( intA + 2 ))
intB=$(( intB + 2 ))
done
echo "$realname1"

I have just combined the two using:

eval realname1= ${realfirstname1}${realfirstname2}

this is part of the way, but i need the 1 and 2 at the end of those variables to be represented by intA and intB.

I have an error, line 50: 'users real name': command not found

I have not issued a command, other than to assign it to the new variable.

Help!