#read -p "which files are what you want to compile? "
case $# in
    "1")
        if [ "$1" == "remove" ]; then
            ls !(*.c|*.sh) | xargs rm
            
            if [ "$?" == "0" ]; then
                echo "remove successfully"
            else
                echo "remove failure"
            fi
        else
            gcc -o ${1%.c} $1
        fi
        ;;
    "2")
        gcc -o ${1%.c} $1
        gcc -o ${2%.c} $2
        ;;
    *)
        echo "usage: $0 para1 [para2 ....]"
        ;;
esac