double to hex. How It's Made?

Question

157,453796 = hex 18068A

157,455093 = hex 180697

71,5037 = hex E91D00

71,506104 = hex E93500

71,507103 = hex E93F00

0 = hex 000000

I know exactly what it is not IEEE 754

Answer 1

Here is a tutorial on how to convert from base 10 to hex. http://mathforum.org/library/drmath/view/55783.html

Answer 2

The following depends on the byte-order of your processor architecture and thus can't be read back on every system:

double f = 10020.2093;
char acz[sizeof(double)+1] = '\0';
std::copy((char*)(&f), ((char*)&f)+sizeof(double), acz);