#!/bin/bash
#<pre><b>
# Script     : compfl
# Version    : 1.0
# Author     : Roland Rashleigh-Berry
# Date       : 03-Nov-2004
# Purpose    : To compare two floating point numbers
# SubScripts : none
# Notes      : Will work with integers and also fractions and expressions.
#              Returns GT, EQ or LT.
#              It will calculate fractions or expressions to 9 decimal places
# Usage      : compfl  1.2  3.4
#              compfl 355/113 3.14159
#              compfl 3*1.33  3.99
#              if [ "$(compfl 1.2 3.4)" == "LT" ] ; then
#                print "less than"
#              fi 
#===============================================================================
# PARAMETERS:
#-pos- -------------------------------description-------------------------------
#  1   First number (or expression) to compare
#  2   Second number (or expression) to compare
#===============================================================================
# AMENDMENT HISTORY:
# init --date-- mod-id ----------------------description------------------------
# 
#===============================================================================
# This is public domain software. No guarantee as to suitability or accuracy is
# given or implied. User uses this code entirely at their own risk.
#===============================================================================

if [ $# -ne 2 ] ; then
  echo "Usage: compfl  6.67  4.45" 1>&2
  exit 1
fi


# recalculate just in case they are fractions or expressions
num1=$(echo "scale=9; $1 + 0" | bc -l)
num2=$(echo "scale=9; $2 + 0" | bc -l)


# compare within gawk
echo | gawk '{
if (num1 > num2)
  print "GT"
else
  {
  if (num1 == num2)
    print "EQ"
  else
    print "LT"
  }
}' num1="$num1" num2="$num2"