#!/bin/bash
# Copyright 2005 Daniel Cer (daniel.cer@cs.colorado.edu)
#
# This work is licensed under the Creative Commons Attribution-NonCommercial-
# ShareAlike License. To view a copy of this license, visit 
# http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to 
# Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 
# 94105, USA.

PREC_DIG=5                # work-around for lack of easy integer division 
PREC_MUL=$[10**PREC_DIG]

if [ $# -ne 2 ]; then
  echo -e "Usage:\n\t$0 [int/real] (count)"; exit -1
fi

RANDMAX=32767 # as given on the Bash 3.0 man page
type=$1; count=$2;

if [ "$type" == "int" ]; then
 for ((i = 0; i < count; i++)); do echo $RANDOM; done
elif [ "$type" == "real" ]; then
 # modulus of RANDOM and RANDMAX+1 is taken to keep the values in the range 
 # [0,1.0) even if the true 'RANDMAX' is ever increased in the future
 for ((i = 0; i < count; i++)); do 
   result= printf "0.%.${PREC_DIG}d" \
     $[((RANDOM%(RANDMAX+1))*PREC_MUL)/(RANDMAX+1)]
   echo $result
 done
else
  echo "Invalid type: \"$type\""
fi