Answer:
<em>Dinner plate is a type of plate used for main courses. The average dinner plate measures 11 or 12 inches across. This plate is the most used plate during the entire meal and it usually comes out after the salad, it is the plate resting just above the charger.</em>
A driver. A driver is basicly and application or component that helps communicate between you computer and a device(a mouse, keyboard, printer etc.) You may have know when you get a new mouse and connect it up, Windows always tries to find a driver and download it.
Hey dude don't leave tell a mod bout it they'll fix everything up for you.
Your question wasn't very clear, but I think I understand what you want. Additionally, you should really state what language you're working with. Here it is in C#, and shouldn't be too much of a hassle to translate in to other languages.
Console.Write("Enter payment: ");
float payment;
if (float.TryParse(Console.ReadLine(), out payment))
Console.WriteLine((Math.Floor(payment * 100) / 100) * 0.15, + " at 15% tip.");
else
Console.WriteLine("Invalid input.");