In optical storage the data is encoded on the disk in the form of tiny pits that are arranged in the concentric rings.
so the answer should be
Optical storage devices focus a tiny pits in concentric tracks on a disk surface that acts as the storage medium.
I Hope it will help you.
It might because of many reasons:
- Fan 1 is not connected to the Program (via Bluetooth, WIFI, or wired)
- The code made to make Fan 1 start up has a bug or an error
- Fan 1 has a hardware problem
- Fan 1 is out of reach for the electronically controller to reach
- Fan 1 is not connected to a power supply (tho)
<u><em>sorry if my answers don't help solve your problem </em></u>
<span>It is a Compound machine.</span>
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.");