#!/bin/bash
#------------------------------------------------
#scvsub (subtract) for dev tool
#usage: scvsub 2 1
#       echo "2-1" | bc
#------------------------------------------------
usage() {
  echo "scvsub 2 1"
  echo "return 2-1 (subtract)"
  exit 1
}

#------------------------------------------------
PCOUNT=$#
if [ $PCOUNT -ne 2 ]; then
  usage
fi

echo "${1}-${2}" | bc
exit 0
#eof
 
