Processing options and parameters with getopts

getopts.zsh

#!/bin/zsh
# processing options and parameters with getopts

while getopts :a:b:cd opt
do
	case "$opt" in
		a) echo "The -a option, value $OPTARG";;
		b) echo "The -b option, value $OPTARG";;
		c) echo "The -c option";;
		d) echo "The -d option";;
		*) echo "Unknown option: $opt";;
	esac
done
shift $[ $OPTIND - 1 ]

count=1
for param in "$@"
do
	echo "Parameter $count: $param"
	count=$[ $count + 1 ]
done