Shell Programming and Scripting

#!/bin/bash
clear
#set -x
echo " TEST"
files=$(ls -l | grep ^- |  awk '{print $NF}')
i='0'
for file in $files
do
i=`expr $i + 1`
echo $i")"  $file
done
echo -e "\n Choose file: "
read VARIABLE_WITH_FILE NUMBER
cat $FILE_NAME

 TEST
1) list_menu.sh
2) one
3) test_file
4) two

 Choose file:
If I press number 3, I want the script to cat test_file, when pressing 1, cat list_menu.sh

select f in $(ls -p | grep -v /)
do
  cat "$f"
done

files=(*)
for ((i=0; i<${#files[@]}; i++))
do
  [ -f "${files[i]}" ] || unset files[i]      # remove directory entries that are not plain files
done

select f in "${files[@]}"; 
do 
  cat "$f"
done

ls -l | egrep ^- | egrep -v "*sh" | awk '{print $NF}'