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i don t really know. The only thing i have are those specs:

the Size : 6 bytes
Value : from -1.0e10m to 1e10m
Binary coded value : integer from 0 to pow (2,48)-1

From the values i guess it...

no no sorry, by longitude i mean that the fields are 6 bytes long. Not longitude as u understood (well understood, it s my fault) , that was an error of translation of my spanish :) sorry.

-My values have sign, so i can not define them as unsigned, is that ok? so then, how can i define them if i must obtain a value of 1.e10 to +1.e10 (coded with 6 bytes)?
Thanks

i defined as chars just because i need a longitude of 6 bytes for this field. Is there an equivalent representing an integer?
thanks

ah ok, no, the values that i must obtain go from -1.e10 to +1.e10, not characters itselfs, they are numbers but are defined as chars

the binary coded value: integer from 0 to 2 elev (48) - 1
...

Excuseme, what do u mean with multibyte numeric field?

Hello maybe it is a neubie question but i have problems reading the real values coming from a binary BE archive in a LE machine (Intel based).
One of the structures to read is:

struct s{ //60...