Re: [Boost-users] [Units] Temperature conversion problem

Subject: Re: [Boost-users] [Units] Temperature conversion problem
From: Matthias Schabel (boost_at_[hidden])
Date: 2011-11-30 16:24:05

http://www.boost.org/doc/libs/1_48_0/doc/html/boost_units/Examples.html#boost_units.Examples.AbsoluteRelativeTemperatureExample

> Hi,
> 
> There appears to be a temperature conversion problem between ºC and ºF.  Here's a simple test that shows the error under both gcc and Intel on both Darwin and Linux (with Boost trunk).
> 
> brisc:~ kbelco$ cat test3.cpp 
> #include <iostream>
> #include <boost/units/io.hpp>
> #include <boost/units/quantity.hpp>
> #include <boost/units/systems/temperature/celsius.hpp>
> #include <boost/units/systems/temperature/fahrenheit.hpp>
> 
> int main(int, char **) {
>  using namespace boost::units;
>  quantity<fahrenheit::temperature> t(100 * celsius::temperature());
> 
>  // expect output of 212 F, produces 180 F
>  // seems like not adding 32º offset when computing F = (C * 9/5 + 32)
>  std::cout << t << std::endl;
> 
>  return 0;
> }
> 
> brisc:~ kbelco$ icpc -g -Iboost test3.cpp
> 
> brisc:~ kbelco$ ./a.out
> 180 F
> 
> -- Noel
> 
> 
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