Bits and bytes handling
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Hi there...I'm writing a program that will work at bits/byte level. It will accept a double number as an argument, and then the number will be decomposed in two parts: the high and the low, I'm going to do some operations with them. I know about the bitwise operators, but Is anyboady know how to make the decomposition double FUNCTION(double argument) { int hx,lx //MISSING THIS PART!!!! hx = HIGH_PART(argument); lx = LOW_PART(argument); //other operations with hx and lx // return(final_result) } Eric Manuel Rosales Pena Alfaro PhD student Unversity of Essex Wivenhoe Park Colchester, CO4 3SQ Essex, Uk email: emrosa@essex.ac.uk tel: +44-01206-87311
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Hi there...I'm writing a program that will work at bits/byte level. It will accept a double number as an argument, and then the number will be decomposed in two parts: the high and the low, I'm going to do some operations with them. I know about the bitwise operators, but Is anyboady know how to make the decomposition double FUNCTION(double argument) { int hx,lx //MISSING THIS PART!!!! hx = HIGH_PART(argument); lx = LOW_PART(argument); //other operations with hx and lx // return(final_result) } Eric Manuel Rosales Pena Alfaro PhD student Unversity of Essex Wivenhoe Park Colchester, CO4 3SQ Essex, Uk email: emrosa@essex.ac.uk tel: +44-01206-87311
emrosa wrote: ...bits/byte level...double... Do you perchance talk about
DWORD? Or do you really meandouble, the extended precision floating point type? In case ofDWORD, have a look at the HIWORD and LOWORD macros in MSDN.
My opinions may have changed, but not the fact that I am right.
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Hi there...I'm writing a program that will work at bits/byte level. It will accept a double number as an argument, and then the number will be decomposed in two parts: the high and the low, I'm going to do some operations with them. I know about the bitwise operators, but Is anyboady know how to make the decomposition double FUNCTION(double argument) { int hx,lx //MISSING THIS PART!!!! hx = HIGH_PART(argument); lx = LOW_PART(argument); //other operations with hx and lx // return(final_result) } Eric Manuel Rosales Pena Alfaro PhD student Unversity of Essex Wivenhoe Park Colchester, CO4 3SQ Essex, Uk email: emrosa@essex.ac.uk tel: +44-01206-87311
Why not use a standra C union:
union Converter
{
{
short low;
short high;
}
double value;
};Converter x;
x.value = 5.67;
short low = x.low;
short high = x.high;My uinion syntax may not be correct as I have not sed them for years n years n years.... Roger Allen Sonork 100.10016 Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003
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Why not use a standra C union:
union Converter
{
{
short low;
short high;
}
double value;
};Converter x;
x.value = 5.67;
short low = x.low;
short high = x.high;My uinion syntax may not be correct as I have not sed them for years n years n years.... Roger Allen Sonork 100.10016 Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003
Thanks for the hint...I have already tried that and it works fine. Thanks again Eric Manuel Rosales Pena Alfaro PhD student Unversity of Essex Wivenhoe Park Colchester, CO4 3SQ Essex, Uk email: emrosa@essex.ac.uk tel: +44-01206-87311
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Thanks for the hint...I have already tried that and it works fine. Thanks again Eric Manuel Rosales Pena Alfaro PhD student Unversity of Essex Wivenhoe Park Colchester, CO4 3SQ Essex, Uk email: emrosa@essex.ac.uk tel: +44-01206-87311
Your kiding me, that actualy worked? Please explane why. From MSDN: Type double Double precision values with double type have 8 bytes. The format is similar to the float format except that it has an 11-bit excess-1023 exponent and a 52-bit mantissa, plus the implied high-order 1 bit. This format gives a range of approximately 1.7E–308 to 1.7E+308 for type double. Microsoft Specific —> The double type contains 64 bits: 1 for sign, 11 for the exponent, and 52 for the mantissa. Its range is +/–1.7E308 with at least 15 digits of precision. END Microsoft Specific Ok I probubly just broke the law. But I need to know.