How to use '&' and '>>' on a double number

[tnjgraham]

Hey,
I am working on a project where I need to retrive a double number and store 8 bits of the number in one field and the other 16 bits in another field. the code below gives me an error.

  lata= lat>>8;
  latb = (lat & 0xff);

The error states that & and >> are illegal for double. With this in mind, can I use these on a double. If not what can I do to achieve what I am trying to do? Any help will be greatly appreciated.

[MiiNiPaa]

floating point numbers have intricate inner structure, so there is no sense in shift and bitwise and operators for them.

If you can tell me what do you want I might be able to help you

To illustrate:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

#include<iostream> #include<cassert> #include<iomanip> int main() { double d = 3.1415; assert(sizeof(d) == sizeof(unsigned long long)); /*Make sure that our conversions are correct*/ unsigned long long l = *reinterpret_cast<unsigned long long*>(&d); std::cout << std::fixed << std::setprecision(20) << (*reinterpret_cast<double*>(&l) ) << std::endl; /*Shifting value as if it was integer */ l = *reinterpret_cast<unsigned long long*>(&d) >> 1; std::cout << std::fixed << std::setprecision(20) << (*reinterpret_cast<double*>(&l) ) << std::endl; }

Result: 3.14150000000000018119 0.00000000000000000000

And that what happens if I use -3.1415:

-3.14150000000000018119
34468122235899929731268127252972631307719631954602084229973957663296898131825128231025492077425653771839651515076174809397381002673182873761219166865457152.00000000000000000000