将十进制转换为字节数组

Question

assume I have decimal X

I want to calculate 3 byte as a,b,c where a.bc Gig is near X.

I want it to be clean and as short as it possible.

I've already implement it but it is very bad but works.

for example X = 2972117368 , I want a = 2, b = 7, c = 6 . how?

2972117368/(1024*1024*1024) = 2.76799999922514

X will be always lesser than 9.99 gigabyte.

Answer 1

Is seems like you're most of the way there:

decimal x = 2972117368;
double gig = Convert.ToDouble(x) / 1073741824.0;

byte a = (byte)Math.Floor(gig); // works for up to 127 gig - actually up to 256
byte b = (byte)(Math.Floor(gig * 10) % 10);
byte c = (byte)(Math.Floor(gig * 100) % 10);

Edited: For some typos & logical errors

Answer 2

Encoding.ASCII.GetBytes((double.Parse((X / (1024.0 * 1024 * 1024)).ToString("0.00")) * 100).ToString())