Virtual functions ensure that the correct function is called for an object, regardless of the expression used to make the function call. Suppose a base class contains a function declared as virtual and a derived class defines the same function. The function from the derived class is invoked for objects of the derived class, even if it is called using a pointer or reference to the base class.
Now we may need to add a line, and I was wondering how much it would cost for the additional phone? I know that when adding a line its an additional $10 to the plan, but are there any discounts on the phones for the new line, or will it need to be paid for at its full retail price?ow we may need to add a line, and I was wondering how much it would cost for the additional phone? I know that when adding a line its an additional $10 to the plan, but are there any discounts on the phones for the new line, or will it need to be paid for at its full retail price?
Sprint and Verizon Wireless subscribers who are not eligible for an upgrade will be charged the full retail price for the phone. That's $650 for the 16GB iPhone 4S, $750 for the 32GB iPhone 4S, and $850 for the 64GB iPhone 4S.Those prices are the same for the unlocked, contract-free version of the iPhone 4S.f you are not eligible for an upgraded phone at a full discount, AT&T is charging $450 for the 16GB iPhone 4S, $550 for the 32GB model, and $650 for the 64GB model.