if [ "$1" = "-f" ] && [ -n "$1" ]
then
#       echo $1
#       rm.exe -f $2
        echo "You can't use args -f"
else
#       echo "error"
        echo "Are you sure to delete $1?"
        read A
                                                                                
        if [ $A = "y" ]    //问题出在这,难道不可以这样写?不能这样嵌套么?不会吧...
        then
                rm.exe $1
        else
                echo "delete is undo"
        fi
                                                                                
fi