You cannot difficulty statements including c1.radius = 5.0 to alter the radius of occasion c1, as radius is declared as non-public while in the Circle class and is not obvious to other classes like TestCircle. توسعه دهندگان و برنامه نویسان با وجود روابط و زیر مجموعههای مشخص در میان شیها http://garrett16wr0.luwebs.com/6288169/oop-چیست