Shell 简单的获取命令行参数

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#! /bin/bash
 
while getopts a:bc opt
do
        case $opt in
                a)
                        echo "aaa"
                        echo $OPTARG
                        ;;
                b)
                        echo "bb"
                        ;;
                c)
                        echo "ccc"
                        ;;
                *)
                        echo "error"
                        ;;
        esac
done