calc

#!/bin/bash

scale=2

function printUsage
{
cat << EOF
	In addition to standard math functions, calc also supports:

	a % b			reminder of a/b
	a ^ b			exponential: a raised to the b power
	s(x)			sine of x, x in radians
	c(x) 			cosine of x, x in radians
	a(x) 			arctangent of x, x in radians
	l(x)			natural log of x
	e(x)			exponential log of raising e to the x
	j(n,x) 			Bessel function of integer order n of x
	scale N 		show N fractional digits (default = 2)
	
EOF
}

if [ $# -gt 0 ]
then
	exec scriptbc "$@"
fi

echo "Calc--a simple calculator. Enter 'help' for help, 'quit' to quit."

/bin/echo -n "calc> "

while read command args
do
	case $command
	in
		quit|exit) 	exit 0						;;
		help|\?) 	printUsage						;;
		scale) 	scale=$args						;;
		*)		scriptbc -p $scale "$command" "$args"	;;
	esac

	/bin/echo -n "calc> "
done

echo ""

exit 0