132 lines
2.8 KiB
Bash
Executable File
132 lines
2.8 KiB
Bash
Executable File
#!/usr/bin/ksh
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#
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# SCRIPT: float_aaverage.ksh
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# AUTHOR: Randy Michael
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# DATE: 03/01/2007
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# REV: 1.1.A
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#
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# PURPOSE: This script is used to average a list of
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# floating-point numbers.
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#
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# EXIT STATUS:
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# 0 ==> This script completed without error
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# 1 ==> Usage error
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# 2 ==> This script exited on a trapped signal
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#
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# REV. LIST:
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#
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#
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#
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# set -x # Uncomment to debug this script
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# set -n # Uncomment to debug without any command execution
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SCRIPT_NAME=`basename $0`
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ARG1="$1"
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ARG2="$2"
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ARG_LIST="$*"
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TOTAL_TOKENS="$#"
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SCALE="0"
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########################################################
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################ FUNCTIONS #############################
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########################################################
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function usage
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{
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echo "\n\n"
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echo "Numbers to average...\n"
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echo "USAGE: $SCRIPT_NAME [-s scale_value] N1 N2...N#"
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echo "\nFor an integer result without any significant decimal places..."
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echo "\nEXAMPLE: $SCRIPT_NAME 2048.221 65536 \n"
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echo "OR for 4 significant decimal places"
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echo "\nEXAMPLE: $SCRIPT_NAME -s 4 8.09838 2048 65536 42.632\n"
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echo "Try again...EXITING...\n"
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}
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########################################################
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function exit_trap
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{
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echo "\n...EXITING on trapped signal...\n"
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}
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########################################################
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################ START OF MAIN #########################
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########################################################
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###### Set a Trap ######
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trap 'exit_trap; exit 2' 1 2 3 15
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########################
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if [ $# -lt 2 ]
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then
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echo "\nIncorrect number of command auguments...Nothing to average..."
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usage
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exit 1
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fi
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if [ $ARG1 = "-s" ] || [ $ARG1 = "-S" ]
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then
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echo $ARG2 | grep [[:digit:]] >/dev/null 2>&1
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if [ $? -ne "0" ]
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then
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echo "\nERROR: Invalid argument - $ARG2 ... Must be an integer...\n"
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usage
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exit 1
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fi
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echo $ARG2 | grep "\." >/dev/null 2>&1
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if [ $? -ne "0" ]
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then
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SCALE="$ARG2"
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NUM_LIST=`echo $ARG_LIST | cut -f 3- -d " "`
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(( TOTAL_TOKENS = $TOTAL_TOKENS - 2 ))
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else
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echo "\nERROR: Invalid scale - $ARG2 ... Scale must be an integer...\n"
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usage
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exit 1
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fi
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else
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NUM_LIST=$ARG_LIST
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fi
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for TOKEN in $NUM_LIST
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do
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echo $TOKEN | grep [[:digit:]] >/dev/null 2>&1
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RC=$?
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case $RC in
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0) cat /dev/null
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;;
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*) echo "\n$TOKEN is not a number...Invalid argument list"
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usage
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exit 1
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;;
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esac
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done
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# Build the list of numbers to add for averaging...
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ADD=""
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PLUS=""
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for X in $NUM_LIST
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do
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ADD="$ADD $PLUS $X"
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PLUS="+"
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done
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# Do the math here
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AVERAGE=`bc <<EOF
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scale=$SCALE
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(${ADD}) / $TOTAL_TOKENS
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EOF`
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########################################################
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# Present the result of the average to the user.
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echo "\nThe averaging equation: (${ADD}) / $TOTAL_TOKENS"
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echo "\nto a scale of $SCALE is: ${AVERAGE}\n"
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