#!/usr/bin/env bash

while [[ $# > 1 ]]
do
  key="$1"
  case $key in
  -i|--input)
    shift
    INPUT="$1"
    ;;
  -d|--dir)
    shift
    DIR="$1"
    ;;
  *)
    ;;
  esac
  shift
done

if [[ -z "${INPUT}" ]]; then
  echo "Please input a number:"
  read INPUT
fi

if [[ -z "${DIR}" ]]; then
  DIR="$( cd "$( dirname "$0" )" && pwd )"
  DIR="$( dirname "$DIR" )"
fi

# do something