Portability of binary serialization of double/float type in C++

Question

The C++ standard does not discuss the underlying layout of float and double types, only the range of values they should represent. (This is also true for signed types, is i

Answer 1

You should convert them to a format you will always be able to use in order to recreate your floats/doubles.

This could use a string representation or, if you need something that takes less space, represent your number in ieee754 (or any other format you choose) and then parse it as you would do with a string.